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steel grades : ウィキペディア英語版 | steel grades
Steel grades to classify various steels by their composition and physical properties have been developed by a number of standards organizations. *SAE penial grades *British Standards *International Organization for Standardization ISO/TS 4949:2003 *European standards - EN 10027 *For alloys in general (including steel), unified numbering system (UNS) of ASTM International and the Society of Automotive Engineers (SAE). *Japanese steel grades : Japanese Industrial Standards (JIS) standard *Germany steel grades : DIN standard *China steel grades : GB standard ==European standard steel grades==
European standard steel grade names fall into two categories: # Steel specified by purpose of use and mechanical properties. # Steel specified by chemical composition. The inclusion of a letter 'G' before the code indicates the steel is specified in the form of a casting.
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