Bearing steel and ingot material for bearing having excellent rolling contact fatigue life characteristics and method for manufacturing the same

摘要

The present invention provides bearing steel, comprising a chemical composition including by mass %, C: 0.56%≦[% C]≦0.70%, Si: 0.15%≦[% Si]0.50%, Mn: 0.60%≦[% Mn]≦1.50%, Cr: 0.50%≦[% Cr]≦1.10%, Mo: 0.05%≦[% Mo]≦0.5%, P: [% P]≦0.025%, S: [% S]≦0.025%, Al: 0.005%≦[% Al]≦0.500%, O: [% O]≦0.0015%, N: 0.0030%≦[% N]≦0.015%, and remainder as Fe and incidental impurities.