This specification covers a low-alloy steel in the form of investment castings. These castings have been used typically for small structural parts of intricate design requiring heat treatment to minimize strengths up to 175 ksi (1207 MPa), but usage is not limited to such applications.
SAE AMS5338F-2009 history
2022SAE AMS5338H-2022 Steel, Investment Castings 0.95Cr - 0.20Mo (0.35 - 0.45C) (4140 Mod) Normalized or Normalized and Tempered
2017SAE AMS5338H-2017 Steel@ Investment Castings 0.95Cr - 0.20Mo (0.35 - 0.45C) (4140 Mod) Normalized or Normalized and Tempered (UNS J14046)
2013SAE AMS5338G-2013 Steel, Investment Castings, 0.95Cr - 0.20Mo (0.35 - 0.45C) (SAE 4140 Mod), Normalized or Normalized and Tempered