Alloy Steel Rectangular Bar, Material Alloy Steel, Material Grade 4140, Thickness 1 in, Thickness Tolerance 0 in/-0.009 in, Overall Length 36 in, Overall Width 3 in, Fabrication Cold Rolled, Heat Treatable Heat Treatable, Heat Treatment Annealed, Mechanical Finish Mill, Yield Strength 60,000 psi, Tensile Strength 95,000 psi, Brinell Hardness 241 BHN, Rockwell Hardness Not Rated, Machinability 66 Percent, Standards ASTM A304, ASTM A322, ASTM A331, Appearance Unpolished