JB/T 56099-1999 Quality classification of copper and copper alloy welding wire products JB/T56099-1999 standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T56099-1999
Copper and copper alloy welding wire
Product quality classification
(Internal use)
Published on December 30, 1999
National Bureau of Machinery Industry
Implemented on June 1, 2000
JB/T56099—1999
This standard is a revision of JB/T5609994 "Product quality classification of copper and copper alloy welding wire". During the revision, the original standard was edited and the main technical content remained unchanged. This standard replaces JB/T56099—94 from the date of implementation. This standard is proposed and managed by the National Welding Standardization Technical Committee. The responsible drafting units of this standard are Harbin Welding Research Institute and Shanghai Electric Welding Rod Company. The main drafters of this standard are Li Deshan and Xie Yongdan. 1 Scope
Standard of the Machinery Industry of the People's Republic of China
Copper and Copper Alloy Welding Wire
Product Quality Classification
(Internal Use)
JB/T56099-1999
Replaces JB/T56099-94
This standard specifies the quality grade, inspection and test methods, sampling methods, and evaluation methods of copper and copper alloy welding wires. This standard is applicable to copper and copper alloy welding wires used in welding processes such as molten inert gas shielded welding, tungsten inert gas shielded welding, and gas welding.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2651—1989
Welded joint tensile test method
GB/T2653—1989
GB/T 9460—1988
3 Quality grade
Welded joint bending and flattening test method
Copper and copper alloy welding wire
3.1 The product quality level of copper and copper alloy welding wire is divided into three grades: qualified product, first-class product and superior product, and is assessed in terms of external quality and internal quality. The quality indicators of different grades are shown in Table 1. The root pass rate is not assessed for coiled welding wire. Table 1 Welding wire quality grade index
Inspection items
External quality
(score)
Average root pass rate
Appearance shape
Welding wire chemical composition
Welding seam mechanical properties
Qualified products
Uniform and neat
Quality grade index
Copper and copper alloy welding wires meet the requirements of 3.1 in GB/T9460-1988
Superior products
Uniform, neat and beautiful
Copper and copper alloy welding wires meet the requirements of 3.1 in GB/T9460-1988, and the total amount of impurities should not exceed 0.3%Copper and copper alloy welding wires meet the requirements of the "Welding Material Product Sample" In special cases, according to the needs, the inspection items and inspection methods can be increased or reduced through agreement. When inspected according to the inspection items specified in the agreement, the results should meet the specified quality indicators. Approved by the State Bureau of Machinery Industry on December 30, 1999, and implemented on June 1, 2000
4 Inspection and test methods
4.1 External quality inspection
JB/T56099-1999
4.1.1 The score distribution and inspection quantity of welding wire external quality inspection items are shown in Table 2. Table 2 Welding wire inspection content
Score distribution
Inspection items
Bending
(Fractional item)
2 Welding wire external quality inspection details
4.1.2.1 ImpuritiesWww.bzxZ.net
(Fractional item)
The welding wire surface has obvious inclusions and impurities that affect the welding quality, which is unqualified for this item. 2 Oil stains (including oil strips)
The welding wire surface has obvious oil stains (including oil strips), which is unqualified for this item. 4.1.2.3 Cracks
Inspection quantity
(root item)
(m/item)
If the surface of the welding wire is cracked or the seam is black, the longitudinal length is greater than or equal to 40mm, the transverse length is greater than or equal to πR, and there is obvious pain when pulling the hand, it is unqualified for this item.
4.1.2.4 Pits
Can be clearly detected, which significantly affects the appearance of the welding wire, which is unqualified for this item. 5 Diameter
The diameter of the welding wire shall comply with the provisions of Chapter 2 of GB/T946019882
4.1.2.6 Screws
If there is obvious feeling, it is unqualified for this item.
4.1.2.7 Peeling
JB/T56099—1999
If the surface of the welding wire is peeled off or lifted, it is unqualified for this item. 4.1.2.8 Pit
If the area of ​​the pit on the surface of the welding wire is greater than 4mm2 and the depth is greater than 0.3mm, it is unqualified for this item. 4.1.2.9 Scratches
If the depth of the local scratch of the welding wire is greater than 0.2mm, or the scratches on the whole wire or the whole section of the wire are obviously noticeable, it is unqualified for this item. 4.1.2.10
If the cut of the welding wire is not flat, it is unqualified for this item. 4.1.2.11 Hair
If the surface is not smooth and can be clearly noticed, and it significantly affects the appearance of the welding wire, it is unqualified for this item. 4.1.2.12 Discoloration
If the color of the welding wire surface is obviously different, it is unqualified for this item. 4.1.2.13 Mark
If there is no mark on the surface of the welding wire, it is unqualified for this item. 4.1.2.14 Curvature
The maximum curvature of the straight welding wire shall not exceed the provisions of Table 3. Table 3 Curvature requirements
Wire diameter
25, 3, 4
4.1.2.15 Length
Wire length shall comply with the provisions of Chapter 2 of GB/T94601988. 4.1.2.16 Tip
Wire tip length greater than 0.5mm is considered unqualified. 4.1.2.17 Double knife
Wire blade depth greater than 0.2mm is considered unqualified. 4.1.3 Scoring method
Wire curvature
4.1.3.1 For straight wires, in addition to diameter, discoloration, and marking, 10% of the total score for each unqualified wire will be deducted for each wire. If more than 10 wires are unqualified, 0.1 point will be deducted for each wire.
Except for diameter, discoloration and marking, for coiled wire, each 500mm section is a section. For each section of unqualified wire, 10% of the total score of that item will be deducted for each section
4.1.3.2 If a straight wire fails to meet the requirements for one item, the higher-scoring item will be deducted, and the deduction will not be repeated, but the number of unqualified items will be counted. If more than one item in each section of coiled wire fails to meet the requirements, the deduction can be repeated. 4.1.3.3 The diameter, discoloration and marking can be deducted repeatedly, but the number of unqualified items will not be counted. 3
JB/T56099—1999
4.1.3.4 The average pass rate of straight welding wire shall be calculated according to formula (1): average pass rate (%) - 1400 passes - sum of unqualified passes 14×100 passes
4.2 Internal quality inspection of welding wire
4.2.1 Chemical analysis of welding wire
Chemical analysis of welding wire shall comply with the provisions of 4.1 of GB/T9460—1988. 4.2.2 Tensile test of welding joint
Tensile test of welding joint shall be carried out in accordance with GB/T2651. 4.2.3 Bending test of welding joint
Bending test of welding joint shall be carried out in accordance with GB/T2653. 4.3 Re-inspection
4.3.1 Superior and first-class products shall be subject to one-time inspection, and re-inspection is not allowed. x100%
4.3.2 If any one of the internal quality inspections fails, the inspection shall be doubled and re-inspected. The double re-inspection results shall meet the requirements of qualified products for the inspection.
4.3.3 If any one of the quality grade indicators of the external quality is found to be unqualified, it shall be doubled and re-inspected, and each inspection item shall be used as a re-inspection item at the same time. The re-inspection results shall meet the requirements of qualified products. 4.3.4 If the external quality is doubled and re-inspected again, the unqualified ones shall be re-selected or judged as unqualified products. 5 Sampling method
100 straight welding wires shall be sampled from each batch, and 6m of coiled welding wires shall be sampled, and the sampling locations shall not be less than two. When two items need to be inspected at the same time, 120 straight welding wires can be sampled, and 7m of coiled welding wires can be sampled. When the inspection fails and needs to be re-inspected, the sampling shall be doubled according to the above method. Evaluation method
Qualified products
The external and internal quality of the welding wire meet the requirements of qualified products. First-class products
The external and internal quality of the welding wire meet the requirements of first-class products. 6.3Superior products
Both the external and internal quality of welding wires meet the requirements of superior products. 4
Mechanical industry standards
Copper and copper alloy welding wires
Product quality classification
(for internal use)
JB/T56099—1999
Published and distributed by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing, zip code 100044)*
1/16 sheet 1/2|| tt||2Word count 1Q000
Format 880×1230
First edition in April 2000
Print run 1-500
First printing in April 2000
Price 1000 yuan
99-1542
Mechanical Industry Standard Service Network: http/kvwwJB.ac.cn6661-66095 /8
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