4142 Alloy Steel Rectangular Bar Material Alloy Steel Material Grade 4142 Thickness 2 in Thickness Tolerance +0.010 in/-0.045 in Overall Length 24 in Overall Width 2 1/2 in Fabrication Hot Rolled Heat Treatable Yes Heat Treatment Pre-Hardened Yield Strength 93 000 psi Tensile Strength Not Rated Brinell Hardness 261 Rockwell Hardness C28 to C32 Machinability 63 Percent Standards ASTM A322 Length Tolerance +/-2 in Maximum Temperature 1 000 Degrees F Shape Rectangular Bar