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GB/T 33220-2016 PDF English

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GB/T 33220-2016: Copper-beryllium alloy forgings and extrusions -- General specification
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GB/T 33220-2016: Copper-beryllium alloy forgings and extrusions -- General specification

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NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.150.30 J 32 Copper-beryllium Alloy Forgings and Extrusions - General Specification ISSUED ON: DECEMBER 13, 2016 IMPLEMENTED ON: JULY 01, 2017 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 5 4 General requirements ... 5 5 Order Information ... 6 6 Materials and manufacturing ... 6 7 Chemical composition ... 7 8 State ... 7 9 Grain size ... 7 10 Physical properties ... 7 11 Mechanical properties ... 7 12 Heat treatment ... 8 13 Special requirements ... 9 14 Dimensions and allowable deviation ... 9 15 Process, final processing and appearance ... 9 16 Test method ... 9 Copper-beryllium Alloy Forgings and Extrusions - General Specification

1 Scope

This Standard specifies the requirements, order information, materials and manufacturing, chemical composition, state, grain size, physical properties, mechanical properties, heat treatment, dimensions and allowable deviation, process, final processing, appearance and test method of copper-beryllium alloy forgings and extrusions. This Standard applies to copper-beryllium alloy forgings and extrusions whose alloy grades are C17000 (Be content of 1.7%) and C17200 (Be content of 1.9%). The alloys, which are not indicated with the grade, in this Standard, are C17200 copper-beryllium alloys.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6394, Determination of estimating the average grain size of metal GB/T 8541, Terminology of forging and stamping ASTM E 8, Test methods for tension testing of metallic materials ASTM E 18, Test methods for Rockwell hardness of metallic materials ASTM B 194, Specification for Copper-beryllium Alloy Plate, Sheet, Strip and Rolled Bar ASTM B 249/B249M, Specification for General Requirements for Wrought Copper and Copper-alloy Rod, Bar, Shapes and Forgings ASTM B 601, Classification for Temper Designations for Copper and Copper Alloys - Wrought and Cast ASTM B 846, Terminology for Copper and Copper Alloys requirements are supplements to the relevant provisions of ASTM B 249/B249M.

5 Order Information

5.1 Product order information includes: a) name and version number of this Standard; b) quantity: number of pieces or quality; c) alloy number (see Chapter 1); d) state (see Chapter 8) or heat treatment (see Chapter 12); e) if necessary, the provided forging drawings shall contain shapes, dimensions and allowances; f) the extrusion shall be provided with length (or mass) and straightness. 5.2 when it is required, the forging drawings or purchase order shall be provided with the following information: a) tensile test (see Chapter 11); b) special tests, such as grain size; c) post processing (see Chapter 15); d) grain size (see Chapter 9).

6 Materials and manufacturing

6.1 Materials 6.1.1 The materials which are used for the manufacture of forgings shall be ingots or forgings of C17000 or C17200, of which, the purity and compactness shall be in accordance with the provisions of the products in this Standard. 6.1.2 The quality certificate and test report shall be provided with the smelting furnace number. 6.2 Manufacturing The hot working and heat treatment processes which are used in the manufacture of the product shall be able to make the products meet the requirements of this Standard. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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