3 8 Bolt Shear Strength Grade 5

Grade 8 medium carbon alloy steel quenched and tempered up to.

3 8 bolt shear strength grade 5.

Ultimate tensile strength uts psi lbs square inch ultimate shear strength uss psi uss 6 x uts body shear area bsa square inches single shear strength sss lbs sss uss x bsa nominal bolt diameter gr 2 a307a b gr 5 a325 gr 8 a490. The same is true in metric when comparing 8 8 vs 10 9. Tensile strength psi 307a low carbon steel. The common class grades for metric are 5 8 8 8 10 9 and 12 9.

To be fair the higher the grade of bolt the harder it becomes as rated by the rockwell scale. Reference to table 1 shows that the yield strength of a grade 8 bolt is higher than the ultimate strength of a grade 5 bolt. Bolt safe working loads lbs safe tensile load at 6 000 psi load. Grade 5 medium carbon steel quenched and tempered up to 1 proof load 85000 psi 1 1 1 2 proof load 74000 psi minimum tensile strength 105000 psi.

No matter the system used to grade the bolts the higher the number means the stronger the bolt. Grade 2 low carbon steel up to 3 4 proof load 55000 psi minimum tensile strength 74000 psi 3 4 1 1 2 proof load 33000 psi minimum tensile strength 66000 psi. Shear strengths of bolts by diameter. 1 4 thru 4 n a.

Each grade has a specific bolt strength. Shear is not part of any industry standard and the values presented below are estimations based on 60 of the ultimate tensile strengths. This information is derived from data here. The grade 5 bolt will therefore always fail first whether in tension or shear.

Grade 2 low or medium carbon steel. Safe shear strength at 7500 psi load. Shear strength of alloy steel is approximately 60 of its ultimate tensile strength. Proof load psi min.

The following tensile yield proof and estimated shear strengths are based on the consensus industry standard where applicable. Lead screws and nuts found in hand powered clamps vises grates doors and work tables lead screws and nuts have broad square threads that are well suited for quick assembly high clamping forces and lifting and lowering heavy objects. Head marking grade and material nominal size range inches mechanical properties. There are several grades of bolts but the three common grades for sae are 2 5 and 8.

Yield strength psi min. Bolt grade markings and strength chart. 1 1 4 1 22718 44 178 5 44 178 5 77 312 3 110 446 2 definitions. Medium strength steel coupling nuts include grade 5 and class 8 coupling nuts.

In fact over 21 higher in shear and 25 in tension.