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
4140 Alloy Steel Rectangular Bar, Material Alloy Steel, Material Grade 4140, Thickness 0.5 in, Thickness Tolerance +/-0.002 in, Overall Length 11.75 in, Overall Width 4 in, Fabrication Hot Rolled, Heat Treatable Yes, Mechanical Finish Precision Ground, Yield Strength 127,000 psi, Tensile Strength 148,000 psi, Brinell Hardness 197, Rockwell Hardness C26 to C32, Machinability Not Rated, Standards DFARS Compliant, Appearance Mill, Includes Material Certificate Yes, Length Tolerance +/-0.002 in
Aluminum Plate 6061, Material Aluminum, Material Grade 6061, Temper T651, Plate, Overall Length 36 in, Length Tolerance +/-3.000 in, Overall Width 12 in, Width Tolerance +/-0.084 in, Thickness 0.625 in, Thickness Tolerance +/-0.009 in, Fabrication Extruded, Heat Treatment Pre-Hardened, Heat Treatable Yes, Mechanical Finish Unpolished, Yield Strength 40,000 psi, Tensile Strength 45,000 psi, Brinell Hardness 95, Rockwell Hardness B95, Includes Material Certificate Yes