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This SAE Information Report relates to hot-rolled steel bar products. It is intended as a guideline to assist in the selection and specification of hot-rolled steel bar; however, it is not to be interpreted as a material specification in itself.

In 1941, the SAE Iron and Steel Division, in collaboration with the American Iron and Steel Institute, made a major change in the method of expressing composition ranges for the SAE steels. The plan, as now applied, is based in general on narrower cast or heat analysis ranges plus certain product analysis allowances on individual samples, in place of the fixed ranges and limits without tolerances formerly provided for carbon and other elements in SAE steels. To avoid the possibility of confusion and conflict between SAE and AISI steel designations, all proposed changes in compositions or additions or deletions of numbers will be coordinated between the two organizations. For years the variety of chemical compositions of steel has been a matter of concern in the steel industry.