(a) Chemical composition of bearing steel
|
Spec |
C % |
Si % |
Mn % |
P % |
S % |
Cr % |
Mo % |
Ni |
Hardness |
---|---|---|---|---|---|---|---|---|---|---|
Chrome |
SAE52100 100Cr6 SUJ2 |
0.95 ~ 1.10 |
0.15- |
0.50 |
0.025 |
0.025 |
1.30 |
|
|
64 HRC |
Stainless Steel |
AISI440C SUS440C X105CrMo17 |
0.95 ~ 1.20 |
1.00 |
1.00 |
0.04 |
0.03 |
16.0 ~18.0 |
0.75 max |
|
58 HRC |
KS440 ACD34 X65Cr13 |
0.60 ~ 0.75 |
1.00 |
1.00 |
0.03 |
0.02 |
11.5 |
0.3 max |
|
60 HRC |
|
AISI420 SUS420 X20Cr13 |
0.26 ~ 0.35 |
1.00 |
1.50 |
0.04 |
0.03 |
12.0 |
|
|
55 HRC |
|
AISI304 SUS304 X5CrNi1810 |
0.08 |
0.75 |
2.00 |
0.045 |
0.03 |
18.0 |
|
8.0 |
39 HRC |
|
AISI316 SUS316 X5CrNiMo17- |
0.08 |
1.00 |
2.00 |
0.045 |
0.03 |
16.0 |
2.0 |
10.0 |
39 HRC |
(b) Steel grades for EZO Japan bearings
Component |
Chrome steel bearings |
Stainless steel bearings |
---|---|---|
Inner and Outer Rings |
SAE52100 / SUJ2 / 100Cr6 |
KS440 / ACD34 / X65Cr13 |
Balls |
SAE52100 / SUJ2 / 100Cr6 |
AISI440C / SUS440C / X105CrMo17 |
Shield |
SPCC steel strip |
AISI304 / SUS304 / X5CrNi1810 |
Cage |
SPCC steel strip |
AISI304 / SUS304 / X5CrNi1810 or AISI420 / SUS420 / X20Cr13 |