Bearing Material

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
HIGH CARBON CHROMIUM STEEL STAINLESS STEEL
SYMBOL SUJ2
SUS440C KS440
(ACD34)
CHEMICAL COMPOSITION % C
0.951.10 0.951.20
0.600.75
Si 0.150.35 1.00 1.00
Mn 0.50 1.00 1.00
P 0.025 0.040 0.030
S 0.025 0.030 0.020
Cr 1.301.60 16.0018.00 11.5013.00
Mo 0.08 0.75 0.30
EQUIVALENT SAE52100, 100Cr6 AISI440C,
X102CrMo17
X65Cr13