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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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Steel grades」の詳細全文を読む スポンサード リンク
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