1009 Carbon Steel Square Tread Plate, Material Carbon Steel, Material Grade 1009, Thickness 1/4 in, Thickness Tolerance +/-0.017 in, Heat Treatable Yes, Heat Treatment No Heat Treatment, Overall Length 12 in, Overall Width 12 in, Mechanical Finish Mill, Tensile Strength 60,000 psi, Yield Strength 33,000 psi, Brinell Hardness 149, Machinability Not Rated, Texture Diamond, Shape Square Tread Plate, Standards ASTM A786, Length Tolerance +/-0.125 in, System of Measurement Inch
1018 Carbon Steel Rectangular Bar, Material Carbon Steel, Material Grade 1018, Thickness 1.25 in, Thickness Tolerance +0.000 in/-0.006 in, Overall Length 24 in, Overall Width 3 3/4 in, Fabrication Cold Finished, Heat Treatable Yes, Heat Treatment Case Hardened, Mechanical Finish Polished, Yield Strength 54,000 psi, Tensile Strength 80,000 psi, Brinell Hardness 70, Rockwell Hardness Not Rated, Machinability 78 Percent, Standards ASTM A108, ASTM A29, Shape Rectangular Bar
4142 Alloy Steel Plate, Material Alloy Steel, Material Grade 4142, Heat Treatable Yes, Heat Treatment Pre-Hardened, Mechanical Finish Mill, Overall Length 18 in, Overall Width 10 in, Thickness 0.75 in, Thickness Tolerance +/-0.001 in, Yield Strength Not Rated, Fabrication Hot Rolled, Rockwell Hardness B94, Machinability 50 Percent, Tensile Strength Not Rated, Width Tolerance +0.005 in, Standards ASTM A322, Includes Material Certificate Yes, Appearance Metallic, Brinell Hardness 187, Shape Plate