The ring and ball of bearing are made of chrome steel Gcr15 or stainless steel 9Cr18.The cage is formed to be punched of quality cold-rolled steel;it also can be adopted plastics if necessary.
Steel No:
C%
Si%
Mn%
P%
S%
Cr%
Mo%
Ni%
Gcr15
0.95-1.1
0.15-0.35
0.2-0.45
0.027Max
0.2Max
1.4-1.65
0.1Max
0.23%
The Interchange Table Of Chrome Steel For Designation Country
China
Sweden
Japan
ISO
USA
Germany
Gcr15
SKF3
(JIS)SUJ2
683/XVII1
(AISI)52100
(DIN)100Cr6
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