Steel grades
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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.
- American Iron and Steel Institute, AISI steel grades
- British Standards
- International Organization for Standardization ISO/TS 4949:2003
- For alloys in general (including steel), unified numbering system (UNS) of ASTM International and the Society of Automotive Engineers (SAE).
- Japanese steel grades

