bearing steel is divided into four main categories of carbon chromium bearing steel, carburizing bearing steel, high carbon chromium stainless bearing steel and high temperature bearing steel, etc..
(1) carbon chromium bearing steel, the head grade and the symbol "G", but does not indicate the carbon content. Chromium content to a few thousandths of other alloying elements according to the alloy content of the alloy structural steel. For example: the average amount of chromium bearing steel, 1.50 percent of the grade of GCr15 ".
② carburizing bearing steel, alloy structural steel grades that approach, and the other in the head grade and the symbol "G".
For example, "G20CrNiMo."
③ High quality carburizing bearing steel in the grades of the rear plus the "A". For example: "G20CrNiMoA."
④ carbon chromium stainless bearing steel and high temperature bearing steel, stainless steel and heat-resisting steel grades that method, the head grade without the symbol "G". For example: high-carbon chromium stainless bearing steel 9Cr18 and high temperature bearing steel 10Cr14Mo ".