Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
21CrMoV5-7 Torque Chart (EN 10269 / 1.7709)
The 21CrMoV5-7 torque chart gives the recommended dry and lubricated bolt-up torque values for common stud and bolt sizes in the EN 10269 21CrMoV5-7 Q+T condition. Torque values are calibrated to develop 60 percent of the 0.2 percent proof stress (Rp0.2) per standard bolt-up practice, with K-factor adjustments for friction.
Request the Project-Specific Torque Calculation for Your Application
Recommended Dry Bolt-Up Torque (60 percent Rp0.2)
| Bolt size | Stress area (mm2) | Target preload (kN) | Dry torque K=0.20 (Nm) |
|---|---|---|---|
| M12 | 84.3 | 27.8 | 67 |
| M16 | 157 | 51.8 | 166 |
| M20 | 245 | 80.9 | 324 |
| M24 | 353 | 116.5 | 559 |
| M30 | 561 | 185.1 | 1111 |
| M36 | 817 | 269.6 | 1942 |
| M42 | 1121 | 369.9 | 3107 |
| M48 | 1473 | 486.1 | 4667 |
| M56 | 2030 | 669.9 | 7503 |
| M64 | 2676 | 883.1 | 11304 |
Lubricated Bolt-Up Torque (K=0.13, MoS2 dry-film)
| Bolt size | Target preload (kN) | Lubricated torque (Nm) |
|---|---|---|
| M12 | 27.8 | 43 |
| M16 | 51.8 | 108 |
| M20 | 80.9 | 210 |
| M24 | 116.5 | 363 |
| M30 | 185.1 | 722 |
| M36 | 269.6 | 1262 |
| M42 | 369.9 | 2020 |
| M48 | 486.1 | 3034 |
| M56 | 669.9 | 4877 |
| M64 | 883.1 | 7348 |
Torque-Chart Notes
Torque calculation: T = K x d x F, where K is the nut-factor (0.20 dry, 0.13 lubricated with MoS2), d is the nominal diameter, F is the target preload (60 percent of Rp0.2 x stress area). The chart assumes the EN 10269 minimum 0.2 percent proof stress of 550 MPa. For projects with higher actual Rp0.2 (typical mill values 600 to 700 MPa), the achievable preload increases proportionally and the torque can be re-calibrated.
Related Reference Pages
More reference materials: Datasheet · Bolt Dimensions · Stress-Rupture Tables · FAQ. Back to the 21CrMoV5-7 Alloy Hub.
Satisfaction Survey
