GB/T 26017-2020High purity copper (English PDF)

3.2 Chemical composition

3.2.1 The chemical composition requirements of high purity copper shall comply with the requirements in Table 1.

3.3 Product dimensions

3.3.1 Strip. length × width is (300±1) mm × (10±1) mm; thickness is (4±2) mm.

3.3.2 Block. length × width is (50±1) mm × (50±1) mm; thickness is (4±2) mm.

3.3.3 Product dimensions can be cut to suit the requirements of the purchaser and must be specified in the order (or contract).

3.4 Appearance quality

3.4.1 The surface of high purity copper has a metallic luster. It is clean and tidy. It is free of oil stains, attachments, and pores.

3.4.2 The size of the protrusions on the surface of high purity copper shall not exceed 3 mm × 3 mm. The height beyond the surface shall not exceed 3 mm.

3.4.3 The color of the same batch of products shall remain consistent.

3.5 Other requirements If the purchaser has special requirements for the chemical composition and physical specifications of high purity copper, the supplier and the purchaser can negotiate and indicate it in the order (or contract).

5.1 Inspection and acceptance

5.1.1 The supplier's quality supervision department is responsible for inspecting the products, ensuring that the products comply with the provisions of this Standard or the purchase order (or contract), and filling in the quality certificate.

5.1.2 The purchaser may inspect the products received. If the inspection results are inconsistent with the provisions of this Standard or the purchase order (or contract), the purchaser shall submit a request to the supplier within 15 days from the date of receipt of the product. The supplier and purchaser shall negotiate to resolve the issue. If arbitration is required, the arbitration sampling shall be conducted by the purchaser. The supplier and purchaser shall jointly conduct the arbitration.

5.2 Batching Each batch of products shall consist of products of the same designation produced in the same system and in the same production cycle. The batch weight shall not exceed 1 ton.

5.3 Sampling and sample preparation

5.3.1 Chemical composition arbitration sampling. Use shearing equipment to randomly cut no less than two samples (the specific details can be negotiated by the supplier and the purchaser and specified in the contract). The sample size specifications shall comply with the analysis requirements of YS/T 922.

5.3.2 Place the cut sample in a nitric acid solution with a ratio of V (nitric acid). V (deionized water) = 1.1 [nitric acid purity must be analytical designation or above. Sulfuric acid can also be used instead of nitric acid according to customer requirements and shall be specified in the order (or contract)] and soak for 1 min~2 min. Wash thoroughly with deionized water to remove all foreign dirt and residual acid on the surface and dry (avoid oxidation). Vacuum pack in aluminum plastic bag for arbitration analysis.

5.3.3 Product size and appearance quality shall be inspected piece by piece.

5.4 Determination of test results

5.4.1 The analysis results shall be rounded off in accordance with the provisions of GB/T 8170.The rounded value comparison method shall be used for determination.