Some standard content:
National Standard of the People's Republic of China
Oxygen free copper
Oxygen free copper sheets and stripsSubject content and scope of application
GB/T 14594--93
This standard specifies the product classification, technical requirements, test methods, inspection rules and packaging, marking, transportation and application of oxygen-free copper sheets and strips: This standard applies to oxygen-free copper sheets and strips for use in the electronics industry. Reference standards
GB 5121
GB5231
GB6394
GB 6397
GB 8888
3 Product classification
Metal tensile test method
Metal bending test method
Copper chemical analysis method
Processed copper chemical composition and product shape
Metal average grain size determination method
Metal tensile test specimen
Heavy non-ferrous metal processing product packaging, marking, transportation and storage Oxygen-free copper for electric vacuum devices Metallographic inspection method for oxygen content 3.1 Brand, state, specification
The brand, state and specification of the product shall comply with the provisions of Table 1. Table 1
Soft (M)
Hard (Y)
Note: Hot-rolled plates can be supplied upon agreement between the two parties. 3.2 Permissible deviation of overall dimensions
0.40~10.00
0. 06~0. 45
>0.45~0.85
>0.85~1.20
200~～600
20～300
800~-1500
3.2.1 The permissible deviation of the dimensions of the plate shall comply with the provisions of Table 2. The permissible deviation of the dimensions of the strip shall comply with the provisions of Table 3. Approved by the State Bureau of Technical Supervision on August 30, 1993, and implemented on March 1, 1994
0. 4 ~~0. 5
70.5～~0.7
20. 7~1. 0
>1.0~1. 5bzxZ.net
>1. 5～2. 0
>2. 0~2. 5
>2.5～3. 0
3. 0~4. 0
≥4. 05. 0
5. 0~6. 0
>6. 0~~8.0
>8.0~10. 0
200~400
GB/T14594--93
>400～600
Thickness tolerance
Ordinary grade
Higher grade
Ordinary grade
Higher grade
200~400400~~600
Width tolerance
Length tolerance
Note: D plate width is divided into three types: fixed length, multiple length and irregular length. The width tolerance of multiple length plate is +10mm, and the length tolerance of multiple length plate is +15mm. ②The thickness tolerance level must be specified in the contract, otherwise it shall be supplied as ordinary grade. ③When the purchaser requires the thickness tolerance to be only +” or -”, its value shall be twice the value in the table.) For irregular length plates, the permissible delivery weight shall not exceed 15% of the batch weight and the length shall not be less than 600mm. Table 3
Thickness tolerance
Ordinary grade
0. 06 ~~ 0. 09
≥0. 09~0. 12
0. 12~0. 22
≥>0.22～0.35
>0. 35 ~0. 45
>0. 45~～0. 70
≥0. 70~ 0. 85
0. 85 ~1. 00
>1. 00 -~ [. 20
Wang: When the purchaser requires the thickness deviation to be only "" or "higher grade
t. 0. 020
", the value is twice the value in the table.
②The thickness tolerance level must be specified in the contract, otherwise it will be supplied as ordinary grade. ③The permissible delivery weight is not more than 15% of the batch weight, and the length is not less than 3m. Short strips, 20~150
150---300
Width tolerance
The shape of the plate and strip should be straight, but slight waves are allowed. The unevenness of the plate in the length direction shall not exceed "20mm per meter, and the side curvature of the strip shall not exceed 4mm per meter. GB/T 14594-93
3.2.3 Beveling should not cause the width and length of the plate to exceed its tolerance. 3.3 Marking examples
a. Ordinary plate made of TU1, hard state, 0.65mm thick and 200mm wide. Marked as: Plate TU1Y 0.65X200 GB/T 14594---93b. Higher-grade strip made of TU2, hard state, 0.20mm thick and 200mm wide, marked as: Strip TU2Y Higher-grade 0.20×200 GB/T14594-934 Technical requirements
Chemical composition
The chemical composition of plates and strips shall comply with the provisions of GB5231. 4.2 Mechanical properties
The tensile test results of plates and strips with a thickness greater than 0.3mm shall comply with the provisions of Table 4. Table 4
Tensile strength Gh
4.3 Process properties
Soft (M)
Hard (Y)
N/tnma
Not less than
Elongation
According to the requirements of the purchaser and indicated in the contract, the soft state plate can be subjected to bending test along the rolling direction at room temperature. The plate with a thickness not exceeding 5mm is bent until the two sides are in contact; the plate with a thickness exceeding 5mm is bent until the two sides are parallel, and the diameter of the bending core is equal to the plate thickness. There should be no defects such as cracks at the bending part.
4.4 Grain size
The grain size of the plate and strip in the soft state should not be greater than 0.055mm. Note: The supplier may not conduct grain size inspection, but must ensure the grain size requirements. 4.5 Oxygen content
After hydrogen annealing, the oxygen content of the plate and strip is determined by metallographic method. The oxygen content shall comply with the standard pictures 1, 2, and 3 in YB731. 4.6 Surface quality
4.6.1 The surface of the plate and strip shall be smooth and clean, and shall not have defects such as delamination, cracks, peeling, bubbles, burrs, folds, inclusions, etc. 4.6.2 Slight, local scratches, spots, pits, indentations, and roller marks that do not exceed the allowable deviation of the plate and strip thickness are allowed.
Slight oxidation color, darkening, and slight, local water marks and oil marks are not used as a basis for scrapping. 4.7 Others
The two sides of the plate and strip should be cut flush, without cracks and curling. Slight burrs are allowed. 5 Test methods
5.1 The arbitration analysis method of the chemical composition of the plate and strip shall be carried out in accordance with the provisions of GB5121. 5.2 The tensile test method of the plate and strip shall be carried out in accordance with the provisions of GB228. 5.3 The bending test method of the plate shall be carried out in accordance with the provisions of GB232. 5.4 The grain size determination method of the plate and strip shall be carried out in accordance with the provisions of GB6394. 5.5 The oxygen content determination method of the plate and strip shall be carried out in accordance with the provisions of YB731. 125
GB/T14594--.93
5.6 The external dimensions of the plate and strip shall be measured with a measuring tool of corresponding accuracy. The thickness of the plate shall be measured at a distance of not less than 100 mm from the top corner and not less than 10 mm from the edge; the thickness of the strip shall be measured at a distance of not less than 100 mm from the end and not less than 5 mm from the edge (the strip with a width of less than 50 mm shall be measured at a distance of not less than 3 mm from the edge). The thickness outside the measurement range shall not be scrapped. 5.7 The appearance of the plate and strip shall be visually inspected. 6 Inspection rules
6.1 Inspection and acceptance
6.1.1 Plates and strips shall be inspected and accepted by the supplier's technical supervision department, and the product quality shall be guaranteed to meet the requirements of this standard. 6.1.2 The purchaser shall re-inspect the received products in accordance with the provisions of this standard. If the re-inspection results do not conform to the provisions of this standard, the purchaser shall submit the matter to the supplier within 3 months from the date of receipt of the product, and the supply and demand parties shall negotiate to resolve the issue. 6.2 Batches
Plates and strips shall be submitted for acceptance in batches, and each batch shall consist of the same brand, state and specification. The weight of each batch shall not exceed 2000kg6.3 Inspection items
Each batch of plates and strips shall be inspected for chemical composition, external dimensions, mechanical properties, oxygen content and surface quality. 6.4 Sampling location and sampling quantity
6.4.1 During the melting and casting process, the supplier shall take one sample from each furnace for chemical composition inspection. The buyer shall take one sample from each batch of plates and strips for chemical composition inspection.
6.4.2 For tensile test, two plates (coils) and strips shall be randomly selected from each batch, and one sample shall be randomly selected from each (coil) (for plates, perpendicular to the rolling direction; for strips, along the rolling direction). The samples shall comply with the provisions of P01, P04, and P05 in Table 10 of GB6397. 6.4.3 For bending test or grain size determination, two plates (coils) and strips shall be randomly selected from each batch, and one sample shall be randomly selected from each (coil). 6.4.4 When the batch size is not more than 100kg, two plates (coils) and strips shall be randomly selected from each batch, and one sample shall be randomly selected from each (coil) for oxygen content determination; when the batch size is more than 100kg, four plates (coils) shall be randomly selected from each batch, and one sample shall be randomly selected from each (coil) for oxygen content determination. 6.4.5 Plates and strips shall be inspected for dimensions and surface quality sheet by sheet (roll). 6.5 Repeated test
Even if one sample fails the test, double the sample shall be taken from the batch to retest the failed item. If one sample still fails the retest, the whole batch shall be scrapped or inspected sheet by sheet (roll). The qualified ones shall be accepted in a separate batch. 7 Packaging, marking, transportation and storage
The packaging, marking, transportation and storage of plates and strips shall be carried out in accordance with the provisions of GB8888. Additional remarks:
This standard was proposed by China Nonferrous Metals Industry Corporation. This standard was drafted by Shenyang Nonferrous Metals Processing Plant. The main drafters of this standard are Zhang Chunxuan, Xi Lianyin, Zhang Yicheng and Tan Zhongcheng. From the implementation of this standard, the former Ministry of Metallurgical Industry of the People's Republic of China, the Ministry Standard YB700-70 "Oxygen-free Copper Plate and Strip" issued by the Ministry of Metallurgy Industry of the People's Republic of China, shall be invalidated.
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