Carbon Steel Hex Bar, Material Carbon Steel, Material Grade 1018, Fabrication Cold Rolled, Heat Treatable Heat Treatable, Heat Treatment No Heat Treatment, Hex Width 1 1/8 in, Mechanical Finish Mill, Overall Length 12 in, Rockwell Hardness Not Rated, Brinell Hardness 70 BHN, Tensile Strength Not Rated, Yield Strength 54,000 psi, Machinability 78 Percent, Standards ASTM A108, ASTM A29, Shape Hexagon, Appearance Unpolished, Includes Material Certificate Material Certificate with Lot Number