GB/T 342-2017Dimension, shape, mass and tolerance of cold-drawn round, square and hexagonal steel wires (English PDF)

Foreword

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

This Standard replaces GB/T 342-1997 "Dimension shape mass and tolerance

for cold-drawn round square and hexagonal steel wires". As compared with

GB/T 342-1997, the main changes of this Standard are as follows.

- MODIFY the scope;

- ADD normative references;

- ADD codes;

- ADD the classification of steel wires;

- DELETE marking example;

- MODIFY the nominal dimension, sectional area, and theoretical weight of

steel wires;

- MODIFY the dimension tolerance of steel wires;

- MODIFY the application range of dimension tolerance level of steel wires;

- MODIFY the shape requirements of steel wires;

- MODIFY the length and tolerance of straight strip steel wires.

This Standard uses the redraft law to refer to ISO 22034-2.2016 "Steel wire and

wire products - Part 2.Tolerances on wire dimensions" for preparation. The

degree of consistency with ISO 22034-2.2016 is not equivalent.

This Standard was proposed by China Iron and Steel Association.

This Standard shall be under the jurisdiction of China National Technical

Committee for Steel Standardization (SAC/TC 183).

Drafting organizations of this Standard. Hangzhou Chuangyu Metal Technology

Co., Ltd., China Metallurgical Information and Standardization Institute, Jiangsu

Goodroller Machinery Co., Ltd., Jiangsu Fasten Group Co., Ltd.

Main drafters of this Standard. Hong Yazhou, Xu Honglin, Ren Cuiying, Wang

Lingjun, Mu Kaihong, Zhou Xiaohong, Zhu Weijun, Wang Huan.

The previous releases of versions of the standard replaced by this Standard

are.

- GB/T 342-1964, GB 342-1982, GB/T 342-1997.

Dimension, shape, mass and tolerance of

cold-drawn round, square and hexagonal steel wires

1 Scope

This Standard specifies the dimension, shape, mass and tolerance of cold-

drawn round, square and hexagonal steel wires.

This Standard is applicable to the cold-drawn round steel wire with a diameter

of 0.05 mm~20 mm, the cold-drawn square steel wire with a side length of 0.50

mm~10 mm, and the cold-drawn hexagonal steel wire with an opposite side

distance of 1.60 mm~10 mm.

2 Normative references

The following documents are indispensable for the application of this document.

For the dated references, only the versions with the dates indicated are

applicable to this document. For the undated references, the latest version

(including all the amendments) are applicable to this document.

GB/T 321-2005 Preferred numbers - Series of preferred numbers

GB/T 1800.1-2009 Geometrical product specifications (GPS) - Limits and fits

- Part 1.Bases of tolerances deviations and fits

3 Section diagram and labeling symbol

4 Classification, codes

5 Dimension, sectional area, and theoretical weight

6 Dimension tolerance

7 Shape

8 Length and tolerance of straight strip steel wire

The length and tolerance of straight strip steel wire shall conform to the

provisions of Table 6.

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