JB/T 56102.1-1999 Carbon steel welding rods, low alloy steel welding rods, stainless steel welding rods Product quality classification Part 1: Carbon steel welding rod product quality classification
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T56102.1-1999
Carbon steel welding rod, low alloy steel welding rod,
Stainless steel welding rod
Product quality classification Part 1:
Carbon steel welding rod product quality classification
(Internal use)
Published on December 30, 1999
State Machinery Industry Bureau
Implementation on June 1, 2000
JB/T5610 2.1—1999
1 Scope
2 Reference standards
3 Technical requirements
4 Sampling
5 Test methods
Inspection rules
JB/T56102.1-1999
This standard is a revision of the carbon steel welding rod part of JB/T56102-94 "Quality classification of carbon steel welding rods, low alloy steel welding rods and stainless steel welding rods" based on GB/T5117-1995 "Carbon steel welding rods". Compared with the carbon steel welding rod part of JB/T56102-94, the main technical content of this standard has been changed as follows: 1. E5018M type welding rod has been added; 2. Adjustments have been made to the elongation of deposited metal and the interval time for re-arcing; 3. The dust generation item in the process performance has been cancelled. This standard is part of the JB/T56102 series of standards "Quality classification of carbon steel welding rods, low alloy steel welding rods, and stainless steel welding rods". This series of standards includes the following three parts: JB/T56102.1-1999 Quality classification of carbon steel welding rods JB/T56102.2-1999 Quality classification of low alloy steel welding rods JB/T56102.3-1999 Quality classification of stainless steel welding rods This standard replaces JB/T56102-94 from the date of implementation. This standard is proposed and managed by the National Welding Standardization Technical Committee. The drafting units of this standard are Harbin Welding Research Institute, Tianjin Jinqiao Welding Material Co., Ltd., and Jiande Xinanjiang Electric Welding Rod Factory. The drafters of this standard are Wu Zhenxiang, Chen Mo, Chu Jijun, Hou Yongtai, and Du Jiancai. This standard was first issued in 1980, revised for the first time in 1985, revised for the second time in 1988, and this is the third revision. 1 Scope
Machinery Industry Standard of the People's Republic of China
Carbon Steel Welding Rod, Low Alloy Steel Welding Rod,
Stainless Steel Welding Rod
Product Quality Grading Part 1:
Carbon Steel Welding Rod Product Quality Grading
(Internal Use)
JB/T56102.1-1999
Replaces JBT56102-94
This standard specifies the technical requirements, sampling, test methods and inspection rules for the product quality grade of carbon steel welding rods. This standard applies to the product quality grading of carbon steel welding rods. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were 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/T5117--1995 Carbon Steel Welding Rod
3 Technical Requirements
The product quality of carbon steel welding rods is divided into three levels: qualified products, first-class products and superior products. They are assessed according to their external quality, internal quality and process performance.
3.1 External quality
The external quality shall comply with the provisions of Table 1.
Table 1 External quality
Inspection items
External quality
(score)
Average root pass rate%
Eccentricity
Welding rod clamping end
Inner quality
(score)
3.2.1 Chemical composition of deposited metal
Qualified products
The chemical composition of deposited metal shall comply with the provisions of Table 2. Approved by the State Machinery Industry Bureau on December 30, 1999. Quality products
Excellent products
Clamping end is neat and beautiful, and there is no obvious rust on the exposed core part. Implementation on June 1, 2000. Welding rod model
E4300, E4301,
E4303, E4310,
E4311, E4312,
E4313, E4320,
E4322, E4323,
E4324, E4327
E5001, E5003,
E5010, E5011
E5015, E5016,
E5018, E5027||tt| |E4315, E4316,
E4328, E5014,
E5023, E5024
E5028, E5048
ES018M
JB/ T56102.1-1999
Table 2 Chemical composition of deposited metal
Qualified products
First-class products
Superior products
Note: The single values in the table are all maximum values
2 Mechanical properties
0.40~1.60
Qualified products,
First-class products, Superior products
0.0350.040
Mh, N, G, M, V
a) Deposited metal tensile test and E The results of the transverse tensile test of the weld of type 4322 welding rod shall comply with the provisions of Table 3 Table 3 Tensile properties
Tensile strength 0
Welding rod model
E4300, E4301, E4303,
E4310, E4311, E4315,
E4316, E4320, E4323
E4327, E4328
E4312, E4313, E4324
Service point.
Qualified products, first-class products, superior products
E43 series
Qualified products
Elongation 8
Not required
Superior products
Welding rod model
E5001, E5003, E5010
E5015, E5016, E5018,
E5015-1, E5016-1,||tt| |E5018-1、E50241、
E5027、E5028、E5048
E5014、E5023、
E5018M
Tensile strength
Qualified products,
1The single values in the table are all minimum values
JB/T56102.1-1999
Table 3 (end)
Service point. .
First-class products, superior products
E5O series
365~500
Qualified products
Elongation 8s
Superior products
2The tensile strength of the deposited metal of E5018M type welding rod is nominally 490MPa, and the diameter is 2.The service point of 5mm welding rod shall not exceed 530MPab) The Charpy V-notch impact test results of weld metal shall comply with the provisions of Table 4: Table 4 Impact performance
Welding rod model
EXX10, EXX11, E5048
EXX15,
EXX16, EXX18,
EXX01, EXX28, E50241
E4300, EXX03, EXX23
E5015-1, E5016-1,
E5018-1||tt| |E4312, E4313, E4320,
E4322, E5014, EXX24
E5018M
Qualified products
Charpy√-notch impact absorption energy
Average value of 3 values among 5 samples
Average value of 5 samples2
Superior products
Test temperature
1For E4303 welding rod, the test temperature of Charpy V-notch impact can also be 20℃. The impact absorption energy of first-class products shall not be less than 47J, and the impact absorption energy of superior products shall not be less than 60J.
2 For acidic carbon steel electrodes with a diameter not exceeding 25mm, the Charpy V-notch impact absorption energy of first-class and superior products shall be the same as that of qualified products of the corresponding models.
1) When calculating the average value of 3 values in 5 samples, the maximum and minimum values of the 5 values shall be discarded. For qualified products, 2 of the remaining 3 values shall be not less than 27J and the other two values shall be not less than 20J. 2) When calculating the average value using the values of 5 samples, 4 of the 5 values shall be not less than 67J and the other value shall be not less than 54J. c) After bending, the longitudinal bending specimen of the weld metal of E4322 electrode shall not have cracks larger than 3.2mm on the weld. 3
3.2.3 Radiographic flaw detection of weld metal
JB/T56102.1-1999
The requirements for radiographic flaw detection of weld metal shall comply with the provisions of Table 5. Table 5 Requirements for radiographic flaw detection of weld metal
Electrode model
EXX01, EXX15, EXX16, E5018
E5018M, E4320, E5048
E4300, EXX03, EXX10, EXX11, E4313, E5014, EXX23, EXX24, EXX27, EXX28
E4312, E4322
3.2.4 Moisture content of coating, diffusible hydrogen content of deposited metal Requirements for radiographic flaw detection films of weld metal
Qualified products, first-class products, superior products
The moisture content of coating and the diffusible hydrogen content in deposited metal of low-hydrogen type electrodes shall comply with the provisions of Table 6. Except for E5018M welding rod, other low-hydrogen welding rod manufacturers can provide users with either the test results of the welding rod coating moisture content or the diffusible hydrogen content in the deposited metal. In case of dispute, the result of the welding rod coating moisture content shall prevail. The E5018M welding rod manufacturer must provide users with the test results of the coating moisture content and the diffusible hydrogen content in the deposited metal.
Table 6 Coating moisture content, diffusible hydrogen content of deposited metal Coating moisture content
Welding rod model
EXX15, EXX15-1,
EXX16, EXX16-1,
E5018, E5018-1,
EXX28, E5048
EXX15R, EX X15-1R
EXX16R、EXX16-1R
E5018R、E5018-1R
EXX28R、E5048R
E5018M
3.3 Process performance
Normal state
Qualified products
3.3.1 T-joint fillet weld
Moisture absorption state
Diffusible hydrogen content of deposited metal
mL/100g
Glycerol method
First-class productsExcellent productsQualified products, first-class products, excellent productsQualified products≤035
≤030
≤010
First-class productsExcellent products| |tt||Chromatography or mercury method
Qualified products
Qualified products, first-class products and superior products of welding rods shall meet the following requirements: Superior products
≤100
a) The surface of the fillet weld shall be free of cracks, weld bumps, slag inclusions and surface pores after visual inspection. Individual short undercuts with a depth of less than 1mm4
are allowed;
JB/T56102.1—1999
b) The leg size of the fillet weld shall comply with the provisions of Table 7, and the convexity of the convex fillet weld and the difference in the length of the two legs of the fillet weld shall comply with the provisions of Table 8;
c) The two longitudinal fracture surfaces of the fillet weld shall be free of cracks after visual inspection. The total length of the unfused root of the weld shall not exceed 20% of the total length of the weld. For fillet welds welded with E4312, E4313 and E5014 electrodes, when the depth of unfusion is not greater than 25% of the smallest weld leg, it is allowed to exist continuously; for fillet welds welded with other types of electrodes, when the depth of unfusion is not greater than 25% of the smallest weld leg, the length of continuous unfusion should not be greater than 25mm. The fillet weld test does not check internal pores. Table 7 Weld leg size
Electrode model
EX×o1
EX×11
Electrode diameter
1.6，2.0
6.4，8.0
5.6，6.0
6.4，8.0
5.6，6.0
6.4，8.0
6.4，8.0|| tt||Test plate ruler
Plate thickness T
Plate length L
≥150
≥250
≥300
≥300, ||tt ||≥400
≥250
≥300
≥400
≥300
≥300,
≥400||tt ||≥400
≥250
≥300
300,400
≥400
Welding position
Vertical, overhead
Vertical, overhead
Vertical, overhead
Vertical, overhead
Weld leg size
Electrode model
EX×23
EX×24||tt ||EX×27
Electrode diameter
6.4，8.0
5.6，6.0
6.4，8.0
5.6，6.0
6.4，8.0
JB/T56102.1-1999
Table 7 (End)
Plate thickness T
represents “43” or “50”.
Note: “××” in electrode model
Weld leg size
Plate length L
≥250, ≥300
≥300
≥300
≥400
≥300
≥300, ≥400
≥400
≥250
≥300
≥300
≥4 00
≥650
≥300
≥300,
≥400
Convexity and difference in length between two weld legs
Welding position
Vertical, upward
Vertical downward, upward
Horizontal, vertical downward
Weld leg size
Difference in length between two weld legs
3.3.2 Re-striking
The re-striking performance shall comply with the requirements of Table 9.
Coating type
JB/T56102.1-1999
Table 9 Re-ignition performance
Re-ignition interval time
Qualified products
4 Sampling
4.1 Sampling quantitybzxz.net
Superior products
110 electrodes should be sampled from each batch of electrodes, of which 5 electrodes are taken for moisture resistance and coating strength tests respectively, and the other 100 electrodes are first used to inspect other items of external quality, and then used to inspect internal quality and process performance. If the 100 electrodes used to inspect external quality need to be retained, the number of electrodes required for internal quality and process performance tests should be increased during sampling. When the inspection fails and needs to be re-inspected, the sampling should be doubled according to the above method. 2 Sampling method
When sampling each batch of electrodes, take representative samples at least at three locations according to the required number. 5Test methods
5.1 External quality
The scores and inspection quantity of the 18 items of external quality of welding rods are shown in Table 10Table 10 External quality scores and inspection quantity
Inspection items
Eccentricity
Moisture resistance
Coating strength
Electrode diameter
Electrode length
Length of clamping end
Bending
Unclean grinding tail
Blistering and wrinkling
Number of inspection
5.1.1 Eccentricity
JB/T56102.1-1999
Eccentricity shall be inspected by non-destructive method. For each inspection welding rod, any two points shall be measured, and the distance between the two points shall be more than 100mm, but the distance between the measuring point and the end of the welding rod shall be greater than 25mm. The eccentricity is calculated based on the highest value. The measuring point should not be selected at the defective part that affects the measurement of electrode eccentricity.
5.1.2 Moisture resistance
Put the electrode in water and observe it after 1 hour. The coating should not expand or peel off. 5.1.3 Coating strength
Put the electrode horizontally and let it fall freely onto a smooth and flat steel plate with a thickness of not less than 14mm and placed horizontally. The height of the electrode falling is specified in Table 11. Only the coating at both ends of the inspected electrode is allowed to be broken, and the total length of the break is not more than 30mm. Table 11 Rod drop height
Rod diameter
5.1.4 Rod diameter
Rod diameter shall comply with the provisions of Table 12,
5.1.5 Rod length
Rod length shall comply with the provisions of Table 12,
Rod diameter
Basic size
Rod diameter and rod length
Limit deviation
Drop height
Rod length
Basic Size
250-350
350-450
450-700
Limit Deviation
1 It is allowed to manufacture 2.4mm or 2.6mm diameter welding rods instead of 2.5mm welding rods, 3.0mm diameter welding rods instead of 3.2mm welding rods, 4.8mm diameter welding rods instead of 5.0mm welding rods, 5.5mm diameter welding rods instead of 5.6mm welding rods, and 5.8mm diameter welding rods instead of 6.0mm welding rods. 2 According to the requirements of the purchaser, it is allowed to supply welding rods of other sizes through agreement. 5.1.6 Clamping end length
The clamping end length shall comply with the provisions of Table 13
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