1018 Carbon Steel Plate Material Carbon Steel Material Grade 1018 Heat Treatable Yes Heat Treatment No Heat Treatment Mechanical Finish Mill Overall Length 12 in Overall Width 8 in Thickness 0.75 in Thickness Tolerance -0.003 in Yield Strength 54 000 psi Fabrication Cold Finished Machinability 78 Percent Rockwell Hardness Not Rated Tensile Strength 80 000 psi Length Tolerance +/-1 in Width Tolerance -0.013 in Standards A108 ASTM A29 Appearance Unpolished Brinell Hardness 70