This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, and forging stock.
These products have been used typically for parts, 0.875 inch (22.22 mm) and under in nominal thickness at time of heat treatment, requiring a through-hardening steel capable of developing hardness as high as 50 HRC when properly hardened and tempered, and for parts of greater thickness but requiring proportionately lower hardness, but usage is not limited to such applications.
These products have been used typically for parts, 0.875 inch (22.22 mm) and under in nominal thickness at time of heat treatment, requiring a through-hardening steel capable of developing hardness as high as 50 HRC when properly hardened and tempered, and for parts of greater thickness but requiring proportionately lower hardness, but usage is not limited to such applications.
SAE AMS6412M History
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