Product Code:SAE AMS6440 Title:Steel, Bars, Forgings, and Tubing, 1.45Cr (0.93 - 1.05C) (SAE 52100), for Bearing Applications Issuing Committee:Ams E Carbon And Low Alloy Steels Committee Scope:This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.