GB/T 2059-2017Copper and copper alloy strip (English PDF)

3.1 Product classification

3.1.1 Designation, state and specification

The designation, state and specification of strips shall comply with the provisions of Table 1. B - Oxygen-free copper, Pure copper, Phosphorus deoxidized copper; […]

3.1.2 Marking example

The product marking is expressed in the sequence of product name, standard number, designation (or code name), state and specification. The marking example is as follows:

accuracy of ordinary grade, thickness of 0.8 mm and width of 200 mm is marked as:

accuracy of high grade, thickness of 0.8 mm and width of 200 mm is marked as:

3.2 Chemical composition

The chemical composition of strips shall comply with the corresponding provisions in GB/T 5231.

3.3 Dimension and its allowable deviation

The dimension and its allowable deviation of strips shall comply with the corresponding provisions in GB/T 17793. The dimension and its allowable deviation exceeding the range of GB/T 17793 shall be determined by negotiation between the supply and demand parties.

3.4 Mechanical properties

The mechanical properties of strips at room temperature shall comply with the provisions of Table 2. […]

3.5 Bend test

The strips of designation and state listed in Table 3 can be subjected to the bend test. The bend test conditions shall comply with the provisions in Table 3. After the test, the curved surface shall not have visible cracks.

A - 0 times the strip thickness;

B - 0.5 times the strip thickness;

C - 1 times the strip thickness;

D - 1.5 times the strip thickness;

E - 2 times the strip thickness.

3.7 Grain size

The strips of designation listed in Table 5 in the soft annealed (O60) state can be subjected to the grain size inspection, and the grain size shall comply with the provisions of Table 5.

a refers to the minimum grain after complete recrystallization.

A - Nominal mean diameter of grains/mm.

3.8 Surface quality

3.8.2 It is allowed for the surface of strips to have minor, localized defects such as scratches, spots, pits, indentations, roll marks, wrinkles, etc. […]

4.1 Chemical composition

The analysis method for the chemical composition of strips shall comply with the provisions of GB/T 5121 (all parts) or YS/T 482 or YS/T 483. The arbitration analysis method for the chemical composition shall comply with the provisions of GB/T 5121 (all parts).

4.2 Dimension and its allowable deviation

The test method for the dimension and its allowable deviation of strips shall comply with the provisions of GB/T 26303.3. The thickness of strips shall be measured at a distance of ≥ 5 mm form the edge when the width of strips is > 100 mm; and measured at a distance of ≥ 3 mm form the edge when the width of strips is ≤ 100 mm. Beyond the measurement range, the excessive thickness deviation will not be used as the basis for discard.

4.4 Bend test

The bend test method for strips shall comply with the provisions of GB/T 232.

4.5 Electrical properties

4.6 Grain size

The test method for grain size of strips shall comply with the provisions of YS/T 347.

4.7 Surface quality

The surface quality of strips shall be inspected visually.

5.1 Inspection and acceptance

5.1.1 The strips shall be inspected by the technical supervision department of the supply party, to ensure that the product quality comply with the provisions of this Standard (or the order contract); the quality certificate shall be filled. 5.1.2 The demand party shall re-inspect the products received in accordance with the provisions of this Standard and the order (or contract). […]

5.2 Batching

The strips shall be submitted for acceptance in batches, AND each batch shall be composed of the same designation, state and specification. The weight of each batch shall generally be not more than 4 500 kg (if the batch is from same melting, then the batch weight may be not more than 8 000 kg).

5.3 Inspection items

5.3.1 Each batch of strips shall be subject to the inspection of chemical composition, dimension and allowable deviation and surface quality.

5.3.2 Each batch of strips shall be subject to the inspection of mechanical properties (tensile test or hardness test). Select either tensile test or hardness test, if not specified in the contract, select the tensile test. When the tensile test is selected, the hardness test shall be carried out when it is required by the demand party and specified in the contract, and the hardness test results are for reference only. When the hardness test is selected, the tensile test shall be carried out when it is required by the demand party and specified in the contract, and the tensile test results are for reference only.

5.3.3 If required by the demand party and specified in the contract, the inspection of bend test, electrical properties and grain size shall also be carried out.

5.5 Determination of test results

5.5.1 When the chemical composition test results are not qualified, then the whole batch of strips is determined as disqualified. 5.5.2 When the dimensions and surface quality of the strip are not qualified, then the corresponding strip is determined as disqualified. 5.5. […]