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GM292M

2nd Edition, October 1, 2012

Complete Document

Spring Materials – Oil Tempered Chromium-Silicon Steel Wire, Valve Spring Quality

Includes all amendments and changes through Inactive for New Design Notice 4, October 2012


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Superseded By: GMW16807

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Additional Comments:
ENGLISH * INACTIVE FOR NEW DESIGN * USE GMW16807
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Referenced Items:

GM1000M

Product Details:

  • Revision: 2nd Edition, October 1, 2012
  • Published Date: October 2012
  • Status: Superseded By:
  • Superseded By: GMW16807
  • Document Language: English
  • Published By: General Motors Company (GMNA)
  • Page Count: 4
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This specification covers 2 grades of special quality of round and ovate chrome silicon 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.

Grade I steel shall be made by the electric furnace, open hearth, or basic oxygen process. The steel may be either ingot or strand cast. This valve spring quality material is not considered super clean steel.

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