Rolling bearing steels
Rolling bearing steels
According to the EN standard, rolling bearing steels are steels for components of rolling bearings. They are subjected first and foremost to high local alternating stresses and wear during operation. In the used condition they exhibit hardening microstructure (at least in the surface zone).
Hardness
The following table gives the hardness in the usual conditions of delivery for a number of rolling bearing steels as an extract form the corresponding standard.
| Steel designation | Hardness in the delivered condition | Previous designation | ||||||
| Short name | Material number |
+S max. HB |
+A max. HB |
+HR
HB |
+AC1) max. HB |
+AC1) +C max. HB |
+FP
HB |
|
| Through hardening rolling bearing steels | ||||||||
| – | 1.3501 | 2) | – | – | 207 | 2413)4) | – | 100 Cr 2 |
| 100Cr6 | 1.3505 | 2) | – | – | 207 | 2413)4) | – | 100 Cr 6 |
| 100CrMnSi6-4 | 1.3520 | 2) | – | – | 217 | 2514) | – | 100 CrMn 6 |
| 100CrMo7 | 1.3537 | 2) | – | – | 217 | 2514) | – | 100 CrMo 7 |
| 100CrMo7-3 | 1.3536 | 2) | – | – | 230 | – | – | 100 CrM0 7 3 |
| 100CrMnMoSi8-4-6 | 1.3539 | 2) | – | – | 230 | – | – | 100 CrMnMo 8 |
| Case hardening rolling bearing steels | ||||||||
| 17MnCr5 | 1.3521 | 5) | 207 | 156…207 | 170 | 6) | 140…187 | 17 MnCr 5 |
| 19MnCr5 | 1.3523 | 255 | 217 | 170…217 | 180 | 6) | 152…201 | 19 MnCr 5 |
| – | 1.3531 | 255 | – | 179…227 | 180 | 6) | – | 16 CrNiMo 6 |
| 18NiCrMo14-6 | 1.3533 | 255 | – | – | 241 | 6) | – | 17 NiCrMo 14 |