GB/T 37570-2019Copper alloy sheet for oilless bearing (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 alloy sheet for oilless bearing.

This Standard is applicable to copper alloy sheet for Oilless bearing (hereinafter referred to as sheet).

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

YS/T 347 Copper and Copper Alloys - Estimation of Average Grain Size;

YS/T 482 Methods for Analysis of Copper and Copper Alloys - The Atomic Emission Spectrometry;

YS/T 483 Methods for Analysis of Copper and Copper Alloys - X-Ray Fluorescence Spectrometric (wavelength dispersive); hardness of sheet shall comply with the stipulations in GB/T 4340.1.

4 Test Methods

5 Inspection Rules

5.5.4 When there are samples that are disqualified in the inspection result of mechanical properties and grain size, take a double size of samples for re-inspection from that batch of sheets (including the sheet that is disqualified in the previous inspection). If the re-inspection result is completely qualified, then, that batch of sheets shall be determined as qualified. If the re-inspection result is still disqualified, then, that batch of sheets shall be determined as disqualified. Or, the supply-side may inspect sheet by sheet, 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) Determination of grain size (when the demand-side requests);

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