Alloy Steel Sheet, Material Alloy Steel, Material Grade 4130, Heat Treatable Heat Treatable, Heat Treatment Air-Hardened, Mechanical Finish Mill, Overall Length 24 in, Overall Width 24 in, Thickness 0.125 in, Thickness Tolerance +/-0.009 in, Yield Strength 63,000 psi, Fabrication Cold Rolled, Rockwell Hardness 92 HRB, Machinability 70 Percent, Tensile Strength 97,000 psi, Length Tolerance Not Rated, Width Tolerance Not Rated, Standards AMS 6345, ASTM A505