Carbon Steel Square Bar, Material Carbon Steel, Material Grade 1045, Thickness 1.75 in, Thickness Tolerance -0.006 in, Overall Length 6 ft, Overall Width 1 3/4 in, Fabrication Cold Rolled, Heat Treatable Heat Treatable, Heat Treatment No Heat Treatment, Mechanical Finish Mill, Yield Strength 77,000 psi, Tensile Strength 100,000 psi, Brinell Hardness 70 BHN, Rockwell Hardness 39 HRC, Machinability 64 Percent, Standards ASTM A108, ASTM A29, Appearance Unpolished