Bearing steel can be divided into high carbon chromium bearing steel, carburized bearing steel, high carbon chromium stainless bearing steel and high temperature bearing steel and other four categories.

High carbon chromium bearing steel, in brand head plus symbol "G", but does not indicate the carbon content.Chromium content in a few parts per thousand, other alloying elements in the alloy structural steel alloy content.For example: the average chromium content is 1-50% of bearing steel, the brand is expressed as "GCr15.

Carburizing bearing steel, alloy structural steel grades said method, the other in brand head plus symbol "G".For example: "the G20 CrNiMo".Senior high quality carburizing bearing steel, add an "A" at the end of the brand.For example: "G20CrNiMoA".

High carbon chromium stainless bearing steel and high temperature bearing steel, stainless steel and heat resistant steel brand representation, symbol "G" brand head all the time.For example: high carbon chromium stainless bearing steel and high temperature bearing steel cr18 9 "10 cr14mo".