Carbon Steel Square Bar, Material Carbon Steel, Material Grade 1018, Thickness 1.25 in, Thickness Tolerance +/-0.001 in, Overall Length 24 in, Overall Width 1 1/4 in, Fabrication Cold Rolled, Heat Treatable Heat Treatable, Heat Treatment No Heat Treatment, Mechanical Finish Precision Ground, Yield Strength 54,000 psi, Tensile Strength 64,000 psi, Brinell Hardness 126 BHN, Rockwell Hardness 71 HRB, Machinability 78 Percent, Standards ASTM A681, Appearance Metallic