1018 Carbon Steel Plate Material Carbon Steel Material Grade 1018 Heat Treatable Yes Heat Treatment No Heat Treatment Mechanical Finish Mill Overall Length 24 in Overall Width 10 in Thickness 0.25 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 +/-2 in Width Tolerance -0.013 in Standards A108 ASTM A29 Appearance Unpolished Brinell Hardness 70