How To Calculate The Torque Of A Bolt TorcStark 174
Sep 25 2021 nbsp 0183 32 The effective diameter of M20 is Φ17 the effective cross sectional area is 227 square millimeters and the minimum tensile strength of M20 of class 8 8 is σb 830MPa F 830 227 188 41KN Therefore the minimum tensile strength of M20 bolt 8 8 performance grade is 188 41KN Pre tightening torque Mt K P0 d 0 001N m K Tightening force