Flat Bar Stock, Aluminum, 6061, T6511, Sheet, 12 in Overall Length, Length Tolerance +/-1.000 in, 1 in Overall Width, Width Tolerance +/-0.012 in, 0.5 in Thickness, Thickness Tolerance +/-0.009 in, Fabrication Extruded, Heat Treatment Pre-Hardened, Heat Treatable Yes, Mechanical Finish Mill, Yield Strength 40,000 psi, Tensile Strength 45,000 psi, 95 Brinell Hardness, B95 Rockwell Hardness, Includes Material Certificate Yes, Standards AMS-QQ-A-200, ASTM B221, Minimum Temperature -320 Degrees F