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Use Prevailing Torque All-Metal Nut chart if using this style of nut. = Nominal Diameter. = Clamp Load For J429 Grade 5 and 8, FNL Grade 9, A574, Class 4.6, 8.8, 10.9 and 12.9, the clamp loads are listed at 75% of the proof loads specified by the standard. For A307 Grade A, 75% of 36,000 PSI is utilized.
Due to many variables that affect the torque-tension relationship like human error, surface texture, and lubrication the only way to determine the correct torque is through experimentation under actual joint and assembly conditions.
Tightening Torque Guide for Grade 5 & 8 Hex Cap Screws. This table is based on IFI 5th Edition Technical Data N-12/N-16, using Equation (1) and a torque coefficient, K=0.20 for non plated steel fasteners and K=0.15 for plated fasteners.
For J429 Grade 5 and 8, H-K Grade 9, A574, Class 4.6, 8.8, 10.9 and 12.9, the clamp loads are listed at 75% of the proof loads specified by the standard. For A307 Grade A, 75% of 36,000 PSI is utilized. A193 B7 uses 75% of the yield strength.
Torque-Tension Relationship for A307A, Grade 5, 8 & 9 Bolts. The torque values can only be achieved if nut (or tapped hole) has a proof load greater than or equal to the bolt's minimum ultimate tensile strength. Clamp load calculated as 75% of the proof load when specified by the standard. ASTM A307 utilized 75% of 36,000 PSI.
TIGHTENING TORQUE GUIDE based on IFI 5th Edition Technical Data N-12/N-16, using Equation (1) and a torque coefficient, K-0.20 for non-plated steel fasteners and K-0.15 for plated fasteners.
26 Ιουν 2024 · The following chart appears in the 2019 Atlas Copco Industrial Tools and Solutions catalog. It gathers the three required variables to understand and determine the maximum recommended torque for your bolt: bolt size, bolt grade and friction.
