Alloy Steel Rectangular Bar, Material Alloy Steel, Material Grade 4142, Thickness 0.31 in, Thickness Tolerance +/-0.001 in, Overall Length 36 in, Overall Width 2 in, Fabrication Hot Rolled, Heat Treatable Heat Treatable, Heat Treatment Precipitation-Hardened, Tempered, Through-Hardened, Water-Hardened, Mechanical Finish Precision Ground, Yield Strength 60,500 psi, Tensile Strength 95,000 psi, Brinell Hardness 261 BHN, Rockwell Hardness 32 HRC, Standards AISI 4142, ASTM A322, UNS G41420