Ball and Roller Bearing Steels; Technical Conditions of Delivery
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.77 | 1.85 | ||
| Si | - | 0.25 | ||
| Mn | - | 0.35 | ||
| P | - | - | ||
| S | - | - | ||
| Cr | 3.75 | 4.25 | ||
| Mo | 4.00 | 4.50 | ||
| V | 0.90 | 1.10 |
Ball and Roller Bearing Steels; Technical Conditions of Delivery
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 947 (≥) | 115 (≥) | 32 | 32 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 142 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 881 (≥) | 814 (≥) | 23 | 42 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 443 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 443 | 553 | 531 |
We can customize the production of 1.2369 grade, contact us for the best solution.
–sales@specificsteel.com