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GB/T 39799-2021 English PDF (GBT39799-2021)

GB/T 39799-2021 English PDF (GBT39799-2021)

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GB/T 39799-2021: Dimensions, shape, weight and tolerances of titanium and titanium alloy bars and wires
This Document specifies the cross-sectional shape, size and tolerance, appearance and weight of titanium and titanium alloy bars and wires. This Document is applicable to titanium and titanium alloy wires with a diameter of 0.1mm~7.0mm (hereinafter referred to as wire); titanium and titanium alloy round bars with a diameter of greater than 7.0mm~450.0mm (hereinafter referred to as round bars); titanium and titanium alloy square bars with the side length of 30.0mm~450.0mm (hereinafter referred to as square bars); titanium and titanium alloy rectangular bars with a thickness of 25.0mm~204.0mm and a width of 25.0mm~254.0mm.
GB/T 39799-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.50
CCS H 04
Dimensions, Shape, Weight and Tolerances of
Titanium and Titanium Alloy Bars and Wires
ISSUED ON: MARCH 09, 2021
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Cross-Sectional Shape ... 5
5 Dimensions and Tolerances ... 6
6 Appearance ... 9
7 Weight ... 10
Appendix A (Informative) Density of Titanium and Titanium Alloy ... 11
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2009 Directives for Standardization – Part 1: Structure and Drafting of Standards.
Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents. This Document was proposed by China Nonferrous Metals Industry Association. This Document shall be under the jurisdiction of National Technical Committee for Standardization of Nonferrous Metals (SAC/TC 243).
Drafting organizations of this Document: Baoti Group Ltd.; Baoji Titanium Industry Co., Ltd.; China Nonferrous Metals Techno-Economic Research Institute; and AVIC Metal Test Technology Co., Ltd.
Chief drafting staffs of this Document: Hu Zhijie, Feng Junning, Xie Chen, Zhang Jiangfeng, Ma Zhongxian, Bai Zhihui, Zhang Fang, Feng Yongqi, Gao Qi, and Jia Shuanxiao.
Dimensions, Shape, Weight and Tolerances of
Titanium and Titanium Alloy Bars and Wires
1 Scope
This Document specifies the cross-sectional shape, size and tolerance, appearance and weight of titanium and titanium alloy bars and wires.
This Document is applicable to titanium and titanium alloy wires with a diameter of 0.1mm~7.0mm (hereinafter referred to as wire); titanium and titanium alloy round bars with a diameter of greater than 7.0mm~450.0mm (hereinafter referred to as round bars); titanium and titanium alloy square bars with the side length of 30.0mm~450.0mm (hereinafter referred to as square bars); titanium and titanium alloy rectangular bars with a thickness of 25.0mm~204.0mm and a width of 25.0mm~254.0mm (hereinafter referred to as rectangular bars) .
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this document.
GB/T 8170 Rules of Rounding off for Numerical Values and Expression and
Judgement of Limiting Values
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply. 3.1 Roundness
The cross-sectional shape of the round bar is close to the theoretical roundness. 3.2 Squareness
The cross-sectional shapes of the square bars and rectangular bars are close to the theoretical squareness.
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