This specification has been declared NONCURRENT by the Aerospace Materials Division, SAE, as of September 1995. It is recommended, therefore, that this specification not be specified for new designs. Alloy: 51100 UNS Number: G51986
This specification covers a low-alloy steel in the form of bars, forgings, and forging stock. Primarily for parts of small cross-section, such as needle bearings, requiring a through-hardening steel usually with hardness of approximately 60 HRC and subject to very rigid inspection standards.
This specification covers the procedure for through-hardening and related heat treatments of carbon, low-alloy, and specialty steel parts to produce specified mechanical properties within the capability of each respective steel.