52100 noun1 •(US) A common ball bearing metal, also used for blademaking, knifemaking. A high-carbon low-alloy chromium steel; typically containing 1.0% carbon and 1.5% chromium, with low silicon (0.25%) and manganese (0.35%).52100 bearings developed the largest compressive residual stress.52100 continues to be the most used bearing steel.
