Carbon Steel Hex Bar, Material Carbon Steel, Material Grade 1018, Fabrication Cold Rolled, Heat Treatable Not Heat Treatable, Heat Treatment No Heat Treatment, Hex Width 11/16 in, Mechanical Finish Mill, Overall Length 4 ft, Rockwell Hardness 71 HRB, Brinell Hardness 126 BHN, Tensile Strength 64,000 psi, Yield Strength 54,000 psi, Machinability 78 Percent, Standards ASTM A108, Shape Hexagon, Appearance Metallic, Includes Material Certificate Material Certificate with Lot Number