Product Code:SAE AMS6424 Title:Steel Bars, Forgings, and Tubing 0.80Cr - 1.8Ni - 0.25Mo (0.49 - 0.55C) Issuing Committee:Ams E Carbon And Low Alloy Steels Committee Scope:This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.