GB/T 37571-2019Copper and copper alloy strip for relay (English PDF)

Foreword

This Standard was drafted in accordance with the rules in GB/T 1.1-2009.

1 Scope

This Standard stipulates the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order form (or contract) content of copper and copper alloy strip for relay.

This Standard is applicable to copper and copper alloy strip for relay (hereinafter referred to as strip).

2 Normative References

The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 232 Metallic Materials - Bend Test;

GB/T 351 Metallic Materials - Resistivity Measurement Method;

GB/T 4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method;

GB/T 5121 (all parts) Methods for Chemical Analysis of Copper and Copper Alloys;

GB/T 5231 Designation and Chemical Composition of Wrought Copper and Copper Alloys;

GB/T 8170 Rules of Rounding-off for Numerical Values & Expression and Judgement of Limiting Values;

GB/T 8888 Wrought Heavy Non-ferrous Metal Products - Packing, Marking, Transportation, Storing and Certificate of Quality;

GB/T 26303.3 Measuring Methods for Dimensions and Shapes of Wrought Copper and Copper Alloys - Part 3: Sheets and Strips;

GB/T 32791 Electromagnetic (eddy-current) Examination Method for Electrical Conductivity of Copper and Copper Alloys;

GB/T 34505-2017 Copper and Copper Alloy Materials - Tensile Testing at Room Temperature;

YS/T 482 Methods for Analysis of Copper and Copper Alloys -

GB/T 34505-2017

GB/T 34505-2017

4 Test Methods

5 Inspection Rules

5.5.2 When the inspection result of chemical composition is disqualified, then, the batch of strips shall be determined as disqualified.

5.5.3 When dimensions, allowable deviations and surface quality are disqualified, the coil of strip shall be determined as disqualified.

5.5.4 When there are samples that are disqualified in the inspection result of mechanical properties, bending performance and electrical performance, take a double size of samples for re-inspection from that batch of strips (including the coil of strip that is disqualified in the previous inspection). If the re-inspection result is completely qualified, then, that batch of strips shall be determined as qualified. If the re-inspection result is still disqualified, then, that batch of strips shall be determined as disqualified. Or, the supply-side may inspect coil by coil, and deliver those that are qualified.

7 Order Form (or contract) Content

Order form (or contract) content of materials listed in this Standard shall include the following content:

a) Product name;

b) Designation (code);

c) Status of supply;

d) Weight;

e) Dimensional precision (common grade or high-precision grade);

f) Either tensile test or hardness test (choose one from them);

g) Electrical performance (when the demand-side requests);

h) Serial No. of this Standard; i) Others. […]