1018 Carbon Steel Plate, Material Carbon Steel, Material Grade 1018, Heat Treatable Yes, Heat Treatment Case Hardened, Mechanical Finish Polished, Overall Length 4 ft, Overall Width 9 in, Thickness 0.38 in, Thickness Tolerance +0.000 in/-0.0013 in, Yield Strength 54,000 psi, Fabrication Cold Finished, Machinability 78 Percent, Rockwell Hardness Not Rated, Tensile Strength 80,000 psi, Width Tolerance +0.000 in/-0.0013 in, Standards ASTM A108, ASTM A29, Brinell Hardness 70, Shape Plate