GB/T 26306-2010Free-cutting copper alloy rod and bar (English PDF)

Foreword

The modification of this Standard adopts ASTM B 16/B 16M-2005 "Standard

Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines"

and ASTM B 301/B 301M-2008 "Standard Specification for Free-Cutting Copper Rod,

Bar, Wire, and Shapes". The degree of consistency with ASTM B 16/B 16M-2005 and

ASTM B 301/B 301M-2008 is modified.

The main differences between this Standard and US ASTM B 16/B 16M-2005 and

ASTM B 301/B 301M-2008 are as follows.

- This Standard has 24 more designations than the US standards. HPb57-4, HPb58-

2, HPb58-3, HPb59-1, HPb59-2, HPb59-3, HPb60-2, HPb60-3, HPb63-3,

HBi59-1, HBi60-1.3, HBi60-2, HMg60-1, HSi75-3, HSi80-3, HSb60-0.9,

HSb61-0.8-0.5, HBi60-0.5-0.01, HBi60-0.8-0.01, HBi60-1.1-0.01, QPb1,

QTe0.3, QTe0.5-0.008, QSn4-4-4.Corresponding technical requirements for

these designations are added.

- This Standard does not include the designations C14510 and C14520 that are in

the American standards.

- Compared with the US standards, it adds internal quality, torsion, ultrasonic flaw

detection, residual stress, dezincification corrosion resistance, grain size, cutting

requirements and corresponding inspection method regulations in this Standard.

- This Standard does not include the requirements for resistivity and conductivity as

well as corresponding test method regulations that are in the American standards.

- This Standard does not cover the O60 condition of rods and bars that is in the

American Standard.

This Standard was proposed by China Nonferrous Metals Industry Association.

This Standard shall be under the jurisdiction of National Technical Committee on Non-

ferrous Metals of Standardization Administration of China (SAC/TC 243).

Main drafting organizations of this Standard. Zhejiang Hailiang Co., Ltd., Ningbo

Pauway Group Co., Ltd.

The drafting organizations of this Standard. Luda (Xiamen) Industrial Co., Ltd., Ningbo

Changzhen Copper Co., Ltd.

Main drafters of this Standard. Feng Huanfeng, Liu Yong, Cai Jihua, Jiang Shaojun,

Sun Gangfeng, Zhou Hebin, Liu Qing, Zhang Ming, Hu Zhenqing, Wang Shuo.

Free-cutting copper alloy rod and bar

1 Scope

This document specifies the requirements, test methods, inspection rules and marks,

packaging, transportation, storage, quality certificate and contract (or purchase orders),

etc. for free-cutting copper alloy rod and bar.

This Standard applies to free-cutting copper alloy rod and bar.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 228-2002, Metallic materials - Tensile testing at ambient temperature

GB/T 2828.1, Sampling procedures for inspection by attributes - Part 1.Sampling

schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

GB/T 3310, Ultrasonic testing method of copper and copper alloy bars

GB/T 5121 (all parts), Methods for chemical analysis of copper and copper alloys

GB/T 5231-2001, Wrought copper and copper alloys chemical composition limits

and forms of wrought products

GB/T 6394, Determination of estimating the average grain size of metal

GB/T 8888, Wrought heavy non-ferrous metal products - Packing, marking,

transporting, storing and quality certificate

3 Requirements

4 Test methods

5 Inspection rules

6 Marks, packaging, transportation, storage and quality certificate

The marks, packaging, transportation, storage and quality certificate of rods and bars

shall be carried out in accordance with the provisions of GB/T 8888.

7 Contract (or purchase order)

The contract (or purchase order) for ordering materials listed in this Standard shall

include the following.

......