GB/T 5216-2004 Translated English of Chinese Standard. (GBT 5216-2004, GB/T5216-2004, GBT5216-2004): Structural steels subject to end-quench hardenability requirements

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https://www.chinesestandard.net, 2015 M01 25 - 44 pages
This standard specifies the steel dimensions, shape, weight and permissible tolerances, technical requirements, test methods, inspection rules, packaging, sign and quality certificate etc. of the hot rolling and hot forging structural steels subject to end-quench hardenability requirements. This standard is applicable to the hot rolling and forging structural steel bars of hardenability used in machinery manufacture with its diameter or thickness no less than 30 mm. The steel hardenability is determined by edge quenching or calculated by the formula.

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Contents

Corrigendum
6
Order Contents
9
Classification and Code Number
10
Technical Requirements
11
Change the primary Article 3 7 2 into the austenite grain size of the steel is not less than
16
Testing Method
17
Inspection Rules
18
Appendix A Informative Calculation Methods of Steel Hardenability
39
Appendix B Informative Comparison Table of Newlyadded Grades Listed in Table 1
44

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