GMNA GM2901M PDF

This specification covers two grades of special quality round and ovate steel wire intended for the manufacture of valve springs requiring resistance to set when used at moderately elevated temperatures and high stress levels. This wire shall be in the oil tempered condition as specified by the purchaser. GM2901M has higher tensile strength requirements and tighter cleanliness specifications than GM292M.

Materials Description. This steel shall be made by the electric furnace, open hearth, or basic oxygen process. This steel shall be strand cast. The subsequent refining processes must include use of secondary ladle refining and use of silicon for deoxidation purposes. The resulting inclusions thus shall predominantly be of a deformable nature. This material is considered super clean steel.

Typical Application. Engine valve springs.