Steel Bars and Forgings 0.25Mo (0.35 - 0.40C) (SAE 4037)
|Publication Date:||15 October 1979|
Form: This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, and forging stock.
Application: Primarily for parts with sections 0.375 in. (9.5 mm) and under in nominal thickness at the time of heat treatment which require a through-hardening steel capable of developing hardness up to 40 HRC when properly hardened and tempered and also parts of greater thickness but requiring proportionately lower hardness.