Carbon Steel Rectangular Bar, Material Carbon Steel, Material Grade 1018, Thickness 0.125 in, Thickness Tolerance +/-0.006 in, Overall Length 36 in, Overall Width 4 in, Fabrication Cold Rolled, Heat Treatable Heat Treatable, Heat Treatment No Heat Treatment, Mechanical Finish Mill, Yield Strength 54,000 psi, Tensile Strength 64,000 psi, Brinell Hardness 126 BHN, Rockwell Hardness 71 HRB, Machinability 78 Percent, Standards ASTM A108, Appearance Metallic