GB/T 5293-1999 Carbon steel welding wire and flux for submerged arc welding
Some standard content:
GB/T5293-1999
This standard is a revision of GB/T5293--1985 "Flux for Submerged Arc Welding of Carbon Steel" based on ANSI/AWSA5.17-89 "Specification for Submerged Arc Welding Wire and Flux for Carbon Steel", and is equivalent to the specification in terms of technical content. When revising GB/T5293-1985 based on ANSI/AWSA5.17 specification, the content of GB/T5293-1985 that is suitable for the technical requirements of flux in my country was retained, and the welding wire and flux were compiled into a standard for the first time, so that the user units can have a more comprehensive understanding of the relationship between welding wire, flux and the mechanical properties of molten metal. This makes this standard more stringent in terms of technical content. This standard replaces GB/T5293-1985 from the date of implementation. Appendix A and Appendix B of this standard are both indicative appendices. This standard was proposed by the State Bureau of Machinery Industry. This standard is under the jurisdiction of the National Technical Committee for Welding Standardization. The drafting organizations of this standard are Harbin Welding Research Institute, Jinzhou Swan Welding Material (Group) Co., Ltd., and Shanghai Electrode and Flux Factory. The drafters of this standard are He Shaoqing, Wen Anran, Li Chunfan, and Ji Longhui. 381
1 Scope
National Standard of the People's Republic of China
Carbon steel electrodes and fluxes for submerged arc welding
Carbon steel electrodes and fluxes for submerged arc weldingGB/T 5293-—1999
Replaces GB/T52931985
This standard specifies the model classification, technical requirements, test methods and inspection rules of carbon steel electrodes and fluxes for submerged arc welding. This standard is applicable to carbon steel electrodes and fluxes for submerged arc welding. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. GB/T700-1988 Carbon structural steel
GB/T 1591-1994
GB/T 2650--1989
GB/T 2652--1989
GB/T 3323—1987
GB/T 3429—1994
Low alloy high strength structural steel
Impact test method for welded joints
Tensile test method for welds and deposited metal
Radiography and quality classification of steel fusion welded butt joints Steel wire rod for welding
GB/T12470—1990
GB/T 14957—1994
Flux for submerged arc welding of low alloy steel
Steel wire for fusion welding
JB/T7948.8-1999 Chemical analysis method for molten flux Determination of phosphorus content by molybdenum blue photometric method JB/T7948.11—1999 Chemical analysis method for molten flux Determination of sulfur content by combustion-iodine titration method 3 Model classification
3.1 Model classification is divided according to the mechanical properties and heat treatment status of the deposited metal of the welding wire-flux combination. 3.2 The model compilation method of welding wire-flux combination is as follows: the letter "F" represents the flux; the first digit represents the minimum tensile strength of the deposited metal of the welding wire-flux combination; the second letter represents the heat treatment state of the specimen, "A" represents the welded state, and "P" represents the post-weld heat treatment state; the third digit represents the minimum test temperature when the impact absorption energy of the molten metal is not less than 27J; the "_" represents the brand of welding wire, and the brand of welding wire shall be in accordance with GB/T14957.
3.3 An example of a complete welding wire-flux model is as follows: F 4A 2 H08A
Indicates the welding wire brand
Indicates that the test temperature is 20℃ when the impact absorption energy of the deposited metal is not less than 27J (see Table 5) Indicates that the specimen is in the welded state (see A1.2)
Indicates that the minimum value of the tensile strength of the deposited metal is 415MPa (see Table 4) Indicates the flux
Approved by the State Administration of Quality and Technical Supervision on September 3, 1999 382
Implementation on March 1, 2000
Technical requirements
4.1 Welding wire
4.1.1 The chemical composition of the welding wire shall comply with the requirements of Table 1. 1999
GB/T5293
Chemical composition of welding wire
Wire grade
Ho8MnA
HIoMn2
H08Mn2Si
H08Mn2SiA
0.30~0.60
0.110.180.350.65
0.11~0. 18
0. 80~~1.10
1.50~1.90
1.70~2.10
1.80~2.10
0.65~0.95
If other elements are present, the total amount of these elements shall not exceed 0.5%. When the surface of the welding wire is copper-plated, the copper content should not exceed 0.35%. According to the agreement between the supply and demand parties, other grades of welding wire can also be produced. 0.20
According to the agreement between the supply and demand parties, the silicon content of H08A, H08E, H08C non-boiling steel is allowed to be no more than 0.10%. 5The manganese content in H08A, H08E, H08C welding wire shall comply with GB/T3429. 4.1.2 Size
The size of the welding wire shall comply with the provisions of Table 2.
Table 2 Size of welding wire
Nominal diameter
1.6,2.0,2.5
3. 2,4. 0,5. 0,6. 0
Note: According to the agreement between the supply and demand parties, other sizes of welding wire can also be produced. 4.1.3 Surface quality of welding wire
N0.0300.030
0.0350.035
0. 035 ≤0. 035
Limit deviation
a) The surface of welding wire shall be smooth, without burrs, depressions, cracks, folds, scales or other defects that are not conducive to welding operation and have adverse effects on the properties of weld metal. b) The surface of welding wire is allowed to have scratches that do not exceed half of the allowable diameter deviation and local defects that do not exceed the diameter deviation. c) According to the agreement between the supply and demand parties, the surface of welding wire can be copper-plated, and the surface of the coating shall be smooth, without visible cracks, pits, rust and coating shedding.
4.2 Flux
4.2.1 The flux is granular and can freely pass through the flux supply pipe, valve and nozzle of standard welding equipment. The particle size of the flux shall383
GB/T 5293-1999
comply with the provisions of Table 3, but other sizes of flux can be manufactured according to the requirements of the agreement between the supply and demand parties. Table 3 Requirements for particle size of flux
Ordinary particle size
<0.450 mm (40 mesh)
>2.50 mm (8 mesh)
4.2.2 The moisture content of the flux shall not exceed 0.10%. <0.280 mm (60 mesh)
>2. 00 mm (10 mesh)
Fine particle size
4.2.3 The mass percentage of mechanical inclusions (carbon particles, iron filings, raw material particles, ferroalloy condensate and other impurities) in the flux shall not exceed 0.30%.
4.2.4 Sulfur and phosphorus content of flux
The sulfur content of flux shall not exceed 0.060%, and the phosphorus content shall not exceed 0.080%. According to the agreement between the supply and demand parties, flux with lower sulfur and phosphorus content can also be manufactured.
4.2.5 When welding with flux, the weld should be neat, beautiful in shape, and easy to remove slag. The transition between welds and between welds and parent materials is smooth, and no serious undercut phenomenon should occur.
4.3 Radiographic flaw detection of weld metal of welding wire-flux combination shall comply with Grade I in GB/T3323. 4.4 Mechanical properties of deposited metal
4.4.1 The tensile test results of deposited metal shall comply with the provisions of Table 4. Table 4 Tensile test
Flux model
F4×X-HXX×
F5××-H×××
Tensile strength products
415-550
480~~650
2 Melt number metal impact test results shall comply with the provisions of Table 5. 4.4.2
Table 5 Impact test
Flux model
F×X0-HX××
F×X2-HX×X
F×X3-HX××
F××4-HX××
FXX5-HXXX
FXX6-HXXX
5 Test method
5.1 Test base material
Impact absorption energy, 」
Finishing strength a
≥330
≥400
Elongation
Test temperature, C
The test base material shall comply with the Q235A grade, B grade, Q255A grade, B grade or other materials with the chemical composition equivalent to the welding wire specified in GB/T700. 16Mn or other equivalent materials specified in GB/T1591 may also be used. 5.2 Chemical composition and surface quality of welding wire
5.2.1 Chemical composition analysis of welding wire Take samples from the welding wire, and any appropriate analysis method may be used for chemical analysis. The arbitration test shall be carried out in accordance with GB/T223.1~223.24L, see Appendix B (suggested Appendix). 5.2.2 Surface quality of welding wire According to the requirements of 4.1.3, visual inspection shall be carried out on any part of each coil (roll) of welding wire. 5.3 Deposited metal mechanical property test
5.3.1 Preparation of mechanical property test pieces
GB/T5293-1999
5.3.1.1 The test pieces shall be prepared in the flat welding position shown in Figure 1. Before welding, the flux shall be dried at 250-400℃ for 1-2 hours or in accordance with the drying specifications recommended by the manufacturer.
5.3.1.2 The test plate used shall be in accordance with the provisions of 5.1. When the test piece is required to be in the welded state and the heat-treated state, two test pieces or one test piece that can provide samples in both states shall be prepared. When one test piece is used, the block test piece shall be cut into two pieces, one in the welded state and the other in the heat-treated state.
5.3.1.3 The test piece shall be reversed or restrained before welding to prevent angular deformation. Test pieces with angular deformation greater than 5° after welding shall be scrapped and correction is not allowed.
5.3.1.4 Use 4.0mm diameter welding wire to weld according to the specifications specified in Table 6. Alternatively, other diameter welding wires may be tested according to the welding specifications recommended by the manufacturer as agreed upon by both parties. 5.3.1.5 Before welding each pass, use a temperature measuring pen or surface thermometer to measure the temperature of the middle of the test piece at a distance of 25mm from the center line of the weld and control it within the range specified in Table 6. If welding is interrupted, the test piece shall be preheated to the interpass temperature range specified in Table 6 when welding is restarted. 300
Impact test specimen
Tensile test specimen
Figure 1 Preparation of test specimens for radiographic inspection and mechanical properties test≥20
Welding wire specifications
Welding current
GB/T 5293—1999
Table 6 Reference welding specifications
Arc voltage
Current type
Welding speed
DC or AC
Interpass temperatureWire extension length
135~165
5.3.1.6 The first layer is welded 1~2 times, and the welding current is appropriately reduced than the specified value. The last layer is welded 3~4 times, and the remaining layers are welded 2~3 times. The transition between the weld and the parent material should be smooth, and the excess height should be uniform, and its height should not exceed 3mm. 5.3.1.7 Heat treatment of test pieces The furnace temperature of the test piece shall not be higher than 300℃ when it is loaded into the furnace, and then heated to 620℃±15℃ at a heating rate of no more than 200℃/h, and kept warm for 1h. After keeping warm, the furnace is cooled to 320℃ at a cooling rate of no more than 190℃/h, and then furnace cooled or air cooled to room temperature. Other heat treatment specifications can also be adopted according to the agreement between the supply and demand parties. 5.3.2. Deposited metal tensile test
5.3.2.1 According to Figure 2, a molten metal tensile test specimen is processed from the test piece after radiographic flaw detection. 5.3.2.2 Molten metal tensile test is carried out in accordance with GB/T2652. 5.3.3 Impact test of deposited metal
5.3.3.1 According to the provisions of Figure 3, a group of 5 impact test specimens shall be processed from the same test piece from which the tensile test specimen of the molten metal is cut. 5.3.3.2 The impact test of deposited metal shall be carried out according to the test temperature specified in GB/T2650 and Table 5. 5.3.3.3 When calculating the average value, the maximum and minimum values of the 5 values shall be discarded. Among the remaining 3 values, 2 values shall not be less than 27J and the other value shall not be less than 20J. The average value of the three values shall not be less than 27J. 5.4 Radiographic flaw detection test of weld
5.4.1 Radiographic flaw detection test of weld shall be carried out before tensile test specimen and impact test specimen are cut from the test piece. The backing plate shall be removed before radiographic flaw detection of weld. If the test piece needs to be subjected to post-weld heat treatment, radiographic flaw detection can be carried out before or after heat treatment. 5.4.2 Radiographic flaw detection test of weld shall be carried out according to GB/T3323. 5.4.3 When evaluating the weld radiographic film, the 25 mm at both ends of the test piece shall not be considered. 12.5
Figure 2 Deposited metal tensile test specimen
5.5 Flux quality inspection
27. 5 ± 0. 30
GB/T5293—1999
RO. 25±0. 025:
Other 125
10:1
Figure 3 Charpy V-notch impact test specimen
From the flux to be inspected (see 6.2.2), take out not less than 100 g of flux respectively by the quartering method and inspect the following items. The sensitivity of the weighing balance used shall not exceed 1 mg.
5.5.1 Inspection of flux particle size
5.5.1.1 When inspecting flux with normal particle size, weigh the flux particles under the 0.450mm (40 mesh) sieve and the particles on the 2.50mm (8 mesh) sieve respectively. When inspecting flux with fine particle size, weigh the flux particles under the 0.280mm (60 mesh) sieve and the particles on the 2.00mm (10 mesh) sieve respectively. Calculate the percentage of flux under the 0.450mm (40 mesh) and 0.280mm (60 mesh) sieves and the flux on the 2.00mm (10 mesh) and 2.50mm (8 mesh) sieves in the total mass.
5.5.1.2 Calculate the percentage of flux with particle size exceeding the standard according to formula (1). Flux with excessive particle size 1
Where: m
Mass of flux exceeding the standard, g #
Total mass of flux, g.
5.5.2 Flux moisture content test
.......( 1 )
5.5.2.1 Place the flux in a furnace at a temperature of 150℃±10℃ and dry it for 2h. After taking it out of the furnace, immediately place it in a desiccator to cool it to room temperature and weigh its mass.
5.5.2.2 Calculate the flux moisture content mo according to formula 2
Flux moisture content 2
Where: m
Mass of flux after drying, 忍;
Mass of flux before drying, 名.
5:5.3 Inspection of mechanical inclusions in flux
5.5.3.1 Select mechanical inclusions by visual inspection and weigh their mass. ×100%
GB/T5293-1999
5.5.3.2 Calculate the percentage of mechanical inclusions according to formula (3). Mechanical inclusions=
Where: m-
Mass of mechanical inclusions, g,
Total mass of flux·g.
5.5.4 Inspection of phosphorus and sulfur content in flux
X 100%
The phosphorus and sulfur content of flux shall be determined according to JB/T7948.8 and JB/T7948.11. 5.5.5 Inspection of welding process performance of flux
When welding mechanical properties test plates, the welding process performance of flux shall be inspected at the same time, and the slag removal performance, weld fusion, weld formation and undercut shall be observed one by one. If any of them is unqualified, the batch of flux shall be considered to have failed the welding process performance inspection. 6 Inspection rules
Welding wire and flux shall be inspected by the quality inspection department of the manufacturer in batches. 6.1 Batch division
Each batch of welding wire shall consist of welding wires of the same furnace number (high-quality welding wire shall be the same furnace number and the same heat treatment furnace number), the same shape, the same size, and the same delivery status.
Each batch of flux shall be made of the same batch of raw materials, with the same formula and manufacturing process. The maximum amount of each batch of flux shall not exceed 60t. 6.2 Sampling method
6.2.1 Sampling of welding wire: 3% of each batch of welding wire shall be taken, but not less than 2 reels (coils, bundles), for chemical composition, size and surface quality inspection.
6.2.2 Flux sampling: if the flux is scattered, no less than 6 samples shall be taken from each batch of flux. If the sample is taken from the packaged flux, at least 6 bags shall be taken from each batch of flux, and a certain amount of flux shall be taken from each bag, with a total amount of no less than 10kg. Mix the extracted flux evenly, and use the quartering method to take out 5kg of flux for welding test pieces, and the remaining 5kg shall be used for other project inspections. 6.3 Acceptance
The quality of each batch of welding wire shall be inspected and accepted in accordance with the provisions of 6.3.1~6.3.3. The quality of each batch of flux and the molten metal mechanical properties of the welding wire-flux combination shall be inspected, and the inspection results of the welding wire with a diameter of 4.0mm or 5.0mm shall be used to determine.
6.3.1 The chemical composition inspection results of each batch of welding wire shall comply with the provisions of Table 1. 6.3.2 The size inspection results of each batch of welding wire shall comply with the provisions of Table 2. 6.3.3 The surface quality inspection results of each batch of welding wire shall comply with the provisions of 4.1.3. 6.3.4 The quality inspection results of each batch of flux shall comply with the provisions of 4.2. 6.3.5 The radiographic flaw detection results of the weld of each batch of welding wire-flux combination shall comply with the provisions of 4.3. 6.3.6 The mechanical property test results of the deposited metal of each batch of welding wire-flux combination shall comply with the provisions of Table 4 and Table 5. 6.4 Re-inspection
When any item fails to pass the inspection, the item shall be re-inspected twice. When re-inspecting the tensile test, the tensile strength, yield strength and elongation shall be re-inspected at the same time. The specimen can be cut from the original test piece or the new test piece. The double re-inspection results shall comply with the provisions of the inspection for that item. 7 Packaging, marking and quality certificate
7.1 Packaging
7.1.1 Welding wire
7.1.1.1 The packaging forms are with wire reel, without wire reel and barrel packaging. The packaging size and mass of each form are shown in Table 7. Other forms of packaging may also be used with the agreement of the supply and demand parties. 388
Welding wire size, mm
2. 5-~6.0
7. 1. 1. 2
fixed.
Welding wire net weight, kg
45,70,90
GB/T 5293--1999
, Packaging size and mass
Inner diameter of shaft, mm
With welding wire reel 305±3
Determined by agreement between the supplier and the buyer
Maximum width of reel, mm
65,120
Without welding wire reel as agreed by the supplier and the buyer
Bucket as agreed by the supplier and the buyer
Maximum outer diameter of reel, mm
445,430
Wire packaging should prevent the wire from being damaged during normal loading and unloading and use, and should be kept clean and dry. Wire winding should avoid waves, hard bends or kinks. The free welding wire should be free from restraint, the beginning of the welding wire should be easily identifiable, and 7.1.1.4 The diameter and pitch of the welding wire should ensure that the welding wire can be continuously fed on automatic and semi-automatic welding equipment. 7.1.2 Flux
7.1.2.1 The packaging of the flux should ensure that it will not be damaged during normal transportation and storage. And ensure that the flux will not deteriorate after one year of storage. 7. 1. 2.2
The weight of the flux packaging is 25kg and 50kg.
7.1.2.3 If the purchaser has special requirements for the packaging of the flux, the packaging of the flux shall be determined by negotiation between the supply and demand parties. 7.2 Marking
7.2.1 The following contents shall be marked on the outside of each welding wire and flux package. a) Standard number, model or brand of welding wire and flux; b) Manufacturer's name and trademark;
c) Specification and net weight;
d) Batch number and production date.
7.2.2 For welding wire without wire reel, a label or instruction manual with marked contents shall be placed inside the package. 7.2.3 For welding wire with wire reel, the label shall be firmly fixed on the wire reel. 7.2.4 For welding wire in barrel, the label shall be firmly fixed on a conspicuous position on the barrel wall. 7.3 Quality certificate
For each batch of welding wire and flux, the manufacturer shall issue a quality certificate based on the actual inspection results. When the user makes a request, the manufacturer shall provide a copy of the inspection results.
A1 Classification system
GB/T 5293--1999
Appendix A
(Suggestive Appendix)
Standard application instructions
A1.1 Wire grades
The wire grades in this standard shall be in accordance with GB/T14957. The first letter "H\" indicates the welding wire content, and the two digits after the letter indicate the average carbon content in the welding wire. If it contains other chemical components, the element symbol will be used after the number. The A, E, and C at the end of the brand name indicate the level of sulfur and phosphorus impurity content, respectively.
A1.2 Flux model
Flux models are divided according to the mechanical properties of the molten metal formed by using various combinations of welding wires and fluxes. Examples of flux models are as follows:
F4A0-H08A
F5P6-H08MnA
F5P4-H10Mn2
"F" indicates flux, and the number after "F" indicates the level of tensile strength. The letter "A" after the strength level indicates the mechanical properties tested in the welded state. "P" indicates the mechanical properties tested after heat treatment; the number after the letter "A\ or "P\" indicates that the impact absorption energy of the deposited metal is not less than 27, and the test temperature requirement, any brand of flux, due to the use of different welding wires and heat treatment conditions, its classification model may have many categories, therefore, the flux should be marked with at least one or all test category models. A2 Flux type
Flux is divided into melting flux, bonding flux and sintering flux according to different production processes. According to the addition of deoxidizer and alloying agent in the flux, it can be divided into neutral flux, active flux and alloy flux. Different types of flux can be identified by the corresponding brand and manufacturer's product manual.
A2.1 Neutral flux
Neutral flux refers to the flux that is left after welding. A flux that does not produce significant changes in the chemical composition of the deposited metal and the chemical composition of the welding wire. Neutral flux is used for multi-pass welding, and is particularly suitable for base materials with a thickness greater than 25mm. The following are the precautions for welding with neutral flux. A2.1.1 Since neutral flux contains no or a small amount of deoxidizer, the welding process can only rely on the welding wire to provide deoxidizer. If single-pass welding or welding of severely oxidized base materials is used, pores and weld cracks will occur. A2.1.2 When the arc voltage changes, the neutral flux can maintain the stability of the chemical composition of the deposited metal. Some neutral fluxes are reduced in the arc zone, and the released oxygen combines with the carbon in the welding wire to reduce the carbon content in the deposited metal. Some neutral fluxes contain silicates, which are reduced to manganese and silicon in the high temperature zone of the arc. Even if the arc voltage changes greatly, the molten metal The chemical composition is also quite stable. A2.1.3 When parameters such as penetration depth, heat input and number of welds change, mechanical properties such as tensile strength and impact toughness change. A2.2 Active flux
Active flux refers to a flux with a small amount of manganese and silicon deoxidizers added. Improve the anti-porosity and anti-cracking performance. The welding precautions of active flux are as follows.
A2.2.1 Due to the presence of deoxidizers, the manganese and silicon in the deposited metal will change with the change of arc voltage. The increase of manganese and silicon will increase the strength of the deposited metal and reduce the impact toughness. Therefore, when using active flux for multi-pass welding, the arc voltage should be strictly controlled. A2.2.2 Among active fluxes, more active fluxes have stronger anti-porosity performance, but will cause more problems in multi-pass welding. A2.3 Alloy flux
GB/T5293-1999
Alloy flux refers to a flux that uses carbon steel welding wire and whose deposited metal is alloy steel. More alloy components are added to the flux and it is used for transition alloys. Most alloy fluxes are bonding fluxes and sintering fluxes. Alloy fluxes are mainly used for welding low alloy steel and wear-resistant cladding, see GB/T12470.
A2.4 Flux neutrality number
Flux neutrality number is a simple method to measure flux neutrality. It is an index related to the Mn and Si content in the weld metal when welding carbon steel with a welding wire-flux combination. When evaluating the flux neutrality number, the flux neutrality number cannot be greater than 40,The smaller the flux neutrality number, the more neutral the flux is.
The calculation method of flux neutrality number is as follows:
a) When welding two chemical composition analysis test blocks, the welding specifications of the first block are the same as the welding test piece specifications. b) When welding the second test block, use a voltage 8√ higher than the arc voltage of the first block, and other specifications are the same. c) The surface of each test block is processed smooth, and the fourth layer (top) of the test block is taken for molten metal analysis. The Mn and Si contents of the two samples are analyzed separately.
d) The flux neutrality number is calculated by the sum of the absolute values of the changes in the Mn and Si values of the two test blocks. The calculation formula is as follows: N = 100(ASil +IAMn)
The change in Si content of one or two test blocks, %, where: ASi-
AMn-The change in Mn content of the two test blocks, %. A3 Selection of welding wire
When selecting welding wire for submerged arc welding, the most important thing to consider is the content of manganese and silicon in the welding wire. Whether single-pass welding or multi-pass welding, the influence of Mn and Si in the transition of welding wire to the deposited metal on the mechanical properties of the deposited metal should be considered. The minimum manganese content must be guaranteed in the deposited metal to prevent the formation of cracks in the center of the weld. In particular, the use of low-Mn welding wire with neutral flux is prone to cracks in the center of the weld. At this time, high-manganese welding wire and active flux should be used to prevent cracks. Generally, some neutral fluxes use Si instead of C and Mn, and reduce their content to the specified value. When using such fluxes, it is not necessary to use Si deoxidized welding wire. For other fluxes without Si addition, Si deoxidized welding wire is required to obtain appropriate wettability and prevent pores. Therefore, welding wire and flux manufacturers should cooperate with each other so that the two products complement each other when used. When welding oxidized parent materials in single-pass welding, sufficient deoxidation components provided by flux and welding wire can prevent pores. Generally speaking, Si has a stronger deoxidizing ability than Mn, so Si deoxidized welding wire and active flux must be used. A4 Mechanical properties of submerged arc welding deposited metal
Tables 4 and 5 list the mechanical properties of weld metal of wire-flux combinations. The mechanical properties are determined by preparing the test specimens according to the procedures required by this standard. This procedure has a small degree of dilution of the parent material, so it can accurately reflect the mechanical properties of the deposited metal of each wire-flux combination. In use, the wire and flux should be treated separately and do not need to be changed at the same time. Therefore, standard test methods must be used to determine the influence of wire and flux on the mechanical properties of weld metal. The chemical reaction of the molten part of the wire and flux and the dilution rate of the parent material have an effect on the composition of the weld metal.
When the thickness of the parent material is within a certain range, the multi-pass welding process required by this standard is generally not used, and single-pass welding is often used. When the toughness requirement is high, multi-pass welding must be used
Special mechanical properties are affected by chemical composition, cooling rate and post-weld heat treatment. High current single pass welding has a greater penetration depth, so the dilution rate of the parent metal is greater than that of low current multi pass welding. Moreover, the weld of high current single pass welding cools more slowly than that of low current multi pass welding. Moreover, the multi pass welded first is affected by the thermal cycle of the welded later, and the microstructures of different parts of these welds change. Therefore, when welding with the same welding wire and flux, there are differences in the mechanical properties of single pass welding and multi pass welding. The mechanical properties of the deposited metal in this standard are measured in the as-welded state or after weld heat treatment (620℃±15℃×1h), or in both states. Most of the deposited metal is suitable for any state, but this standard cannot cover all the states encountered during manufacturing and use. Therefore, the classification requirements in this standard require that the deposited metal be made and tested according to certain specific conditions encountered in practice. In addition, the differences in wire size, wire extension length, joint form, preheating temperature, interpass temperature and post-weld heat treatment have a great influence on the mechanical properties of the joint. Extending the post-weld heat treatment time (20-30h) has a great influence on the strength and impact toughness of the deposited metal.
Appendix B
(Suggested Appendix)
Cited Related Standards Catalog
Determination of Carbon Content in Iron, Steel and Alloy
GB/T 223. 1--1981
GB/T 223. 2—1981
GB/T 223. 3—1988
GB/T 223. 4-1988
GB/T 223. 5---1997
GB/T 223.6--1994
GB/T 223. 7-1981
GB/T 223. 8-1991
GB/T 223.9—1989
GB/T 223.10—1991
GB/T 223. 11--1991
GB/T 223. 12--1991
GB/T 223. 13--1989
Determination of sulfur content in iron, steel and alloys
Chemical analysis methods for iron, steel and alloys
Chemical analysis methods for iron, steel and alloys
Chemical analysis methods for iron, steel and alloys
Chemical analysis methods for iron, steel and alloys
Determination of iron content in alloys and iron powder
Chemical analysis methods for iron, steel and alloys
Chemical analysis methods for iron, steel and alloys
Chemical analysis methods for iron, steel and alloys
Diantimony Phosphorus content by pyrine phosphomolybdic acid gravimetric method Determination of phosphorus content by ammonium nitrate oxidation volumetric method Determination of manganese content
Reduced silicomolybdate photometric method Determination of acid-soluble silicon content by neutralization titration Determination of boron content
Sodium fluoride separation-EDTA volumetric method Determination of aluminum content by azure S photometric method Determination of aluminum content
Copper-iron reagent separation-chrome azure S photometric method Determination of aluminum content Chemical analysis methods for steel and alloys
Chemical analysis methods for steel and alloys
Chemical analysis methods for steel and alloys
GB/T 223. 14—-1989
GB/T 223. 15—1982
GB/T 223. 16-1991
GB/T 223. 17.--1989
GB/T 223. 18—1994
GB/T 223.19-
GB/T 223. 20--1994
GB/T 223. 21--1994
GB/T 223. 22--1994
GB/T 223. 23--1994
GB/T 223.24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||t t||Sodium carbonate separation-diphenylcarbonyl dithiocyanate dithiophotometric determination of chromium contentAmmonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium contentSodium thiosulfate separation-iodine titration determination of copper contentNew cuprous acid-trifluoromethane extraction photometric determination of copper contentPotentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt contentNitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||tt| |Sodium carbonate separation-diphenylcarbonyl dithiocyanate photometric determination of chromium content Ammonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium content Sodium thiosulfate separation-iodine titration determination of copper content Cuproline-trifluoromethane extraction photometric determination of copper content Potentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt content Nitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloysbZxz.net
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||tt| |Sodium carbonate separation-diphenylcarbonyl dithiocyanate photometric determination of chromium content Ammonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium content Sodium thiosulfate separation-iodine titration determination of copper content Cuproline-trifluoromethane extraction photometric determination of copper content Potentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt content Nitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||tt| |Sodium carbonate separation-diphenylcarbonyl dithiocyanate photometric determination of chromium content Ammonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium content Sodium thiosulfate separation-iodine titration determination of copper content Cuproline-trifluoromethane extraction photometric determination of copper content Potentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt content Nitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||tt| |Sodium carbonate separation-diphenylcarbonyl dithiocyanate photometric determination of chromium content Ammonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium content Sodium thiosulfate separation-iodine titration determination of copper content Cuproline-trifluoromethane extraction photometric determination of copper content Potentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt content Nitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content19-
GB/T 223. 20--1994
GB/T 223. 21--1994
GB/T 223. 22-1994
GB/T 223. 23--1994
GB/T 223.24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||t t||Sodium carbonate separation-diphenylcarbonyl dithiocyanate dithiophotometric determination of chromium contentAmmonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium contentSodium thiosulfate separation-iodine titration determination of copper contentNew cuprous acid-trifluoromethane extraction photometric determination of copper contentPotentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt contentNitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content19-
GB/T 223. 20--1994
GB/T 223. 21--1994
GB/T 223. 22-1994
GB/T 223. 23--1994
GB/T 223.24--1994
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Determination of chromium content by ammonium persulfate oxidation-based method||t t||Sodium carbonate separation-diphenylcarbonyl dithiocyanate dithiophotometric determination of chromium contentAmmonium ferrous sulfate volumetric determination of vanadium content
Molybdenum reagent extraction photometric determination of vanadium disk
Gravimetric determination of titanium
Chromotropic acid photometric determination of titanium content
Diantipyryl methane photometric determination of titanium contentSodium thiosulfate separation-iodine titration determination of copper contentNew cuprous acid-trifluoromethane extraction photometric determination of copper contentPotentiometric titration determination of cobalt content
5-CI-PADAB spectrophotometric determination of cobalt contentNitroso R salt spectrophotometric determination of cobalt content
Diacetyl spectrophotometric determination of nickel content
Extraction separation-diacetyl spectrophotometric determination of nickel content
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