Aluminum Plate, Material Aluminum, Material Grade MIC-6, Temper T6, Plate, Overall Length 18 in, Length Tolerance +0.125 in/0 in, Overall Width 18 in, Width Tolerance +0.125 in/0 in, Thickness 0.625 in, Thickness Tolerance +/-0.005 in, Fabrication Cast, Heat Treatment No Heat Treatment, Heat Treatable Not Heat Treatable, Mechanical Finish Mill, Yield Strength 15,200 psi, Tensile Strength 23,900 psi, Brinell Hardness 65 BHN, Rockwell Hardness 60 HRB