Carbon Steel Rectangular Bar, Material Carbon Steel, Material Grade 1018, Thickness 0.25 in, Thickness Tolerance +/-0.001 in, Overall Length 24 in, Overall Width 1 in, Fabrication Hot Rolled, Heat Treatable Heat Treatable, Heat Treatment Tempered, Mechanical Finish Precision Ground, Yield Strength 48,000 psi, Tensile Strength 65,000 psi, Brinell Hardness 168 BHN, Rockwell Hardness 71 HRB, Machinability 78 Percent, Standards AISI C-1018, ASTM A1018, FEDERAL 635, UNS G10180, Appearance RMS 45 Max