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Bolt Torque Calculator
ASME PCC-1 based bolt torque estimation
Unit System:
Carbon steel, high strength, high temp
T = K × D × F | K = 0.15
Common Bolt Material Properties
| Grade | Yield Strength (MPa) | Yield Strength (ksi) | Notes |
|---|---|---|---|
| A193 B7 | 724 | 105 | Carbon steel, high strength, high temp |
| A193 B8 | 207 | 30 | Stainless steel 304/316, lower strength |
| A193 B16 | 724 | 105 | Cr-Mo-V, high temp creep resistance |
| A320 L7 | 724 | 105 | Low temp carbon steel, -100°F service |
Note
K-factor varies significantly with thread condition, coating, and lubrication. ASME PCC-1 recommends field calibration via hydraulic tensioning or torque-turn methods for critical flange joints, following Appendix O qualified procedures.