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| Bearing collar and roller material |
The best material for rolling bearing is high carbon chromium bearing steel, which features desired hardness, strong rolling fatigue resistance, wearing resistance and stable dimension. Its chemical composition is:
Chemical composition of bearing steel GCr15
| Element(wt%) |
C
0.95-1.05 |
Cr
1.40-1.65 |
Si
0.15-0.35 |
Mn
0.25-0.45 |
P
=0.027 |
S
=0.02 |
| Element(wt%) |
Ni
<0.23 |
Cu
=0.25 |
Mo
=0.1 |
Sn
<0.03 |
As
<0.04 |
Ti
<0.005 |
| Element(wt%) |
Sb
<0.002 |
Pb
<0.002 |
O<0.001 |
Al
<0.05 |
Ca
<0.01 |
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Corresponding designation equivalent GCr15
| CHINA |
ISO |
USA |
GERMANY |
JAPAN |
SWEDEN |
| GCr15 |
683/XV? |
52100
(ASTM) |
100Cr6
(DIN) |
SUJ2
(JIS) |
SKF3 |
Staintess steel
| Steel No. |
Chemical composition% |
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
| AISI-440C |
0.95-1.2 |
<1.0 |
<1.0 |
<0.04 |
<0.03 |
16-18 |
<0.75 |
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