Product Code:SAE AMS6359 Title:Steel, Sheet, Strip, and Plate, 0.80Cr - 1.8Ni - 0.25Mo (0.38 - 0.43C) (SAE 4340) Issuing Committee:Ams E Carbon And Low Alloy Steels Committee Scope:This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.