GMW GMW16807 PDF

This specification covers three 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 tempered condition as specified by the purchaser. 

• Type A wire has the lowest tensile strength.

• Type B wire is an intermediate tensile strength grade and 

• Type C wire is a high tensile strength grade.

Material Description. This steel shall be made by any GM approved steel making practice, such as the electric arc furnace or the basic oxygen process. This steel shall be continuously cast. The subsequent refining processes must include the use of secondary ladle refining and the use of silicon for deoxidation purposes. The resulting inclusions shall be predominantly of a deformable nature. This material is considered super clean steel. 

Symbols. Not applicable. 

Typical Applications. Engine valve springs. 

Remarks. Not applicable.