Materials for rolling bearings

Standard material for rings and balls is a vacuum degassed high carbon chromium steel allowing for high efficiency, low torque, low noise level and long bearing life. For bearings requiring anti-corrosion or heat-resistance properties, martensitic stainless steel is used.

CHEMICAL COMPOSITION OF BEARING MATERIALS

MATERIAL SYMBOL CHEMICAL COMPOSITION (Wt%) EQUIVALENT

HARDNESS

 (HRC)

C Si Mn P S Cr Mo
HIGH CARBON CHROMIUM STEEL 100Cr6 0,95~1.10 0,15~0,35 ≤0,50 ≤0,025 ≤0,025 1,30~1.60 ≤0,08 SAE52100, SUJ2, ASTM52100, BS535A99, 1.3505 58~62
STAINLESS STEEL AISI440C 0,95~1.10 ≤1,00 ≤1,00 ≤0,040 ≤0,030 16,0~18,0 ≤0,75 X102CrMo17, X105CrMo17, 1.4125, 1.3543 58~62
KS440 (ACD34) 0,60~0,75 ≤1,00 ≤1,00 ≤0,030 ≤0,020 11,5~13,0 ≤0,30 X65Cr13, 1.4037 58~62