Product Code:SAE AMS5339 Title:Steel, Maraging, Investment Castings, 17Ni - 10Co - 4.6Mo - 0.30Ti - 0.06Al, Vacuum Melted, Homogenized, Overaged and Solution Heat Treated Issuing Committee:Ams E Carbon And Low Alloy Steels Committee Scope: This specification covers an alloy steel in the form of investment castings. Rationale: This specification covers an alloy steel in the form of investment castings.