Flat Bar Stock, Aluminum, 6061, T6511, Bar, 24 in Overall Length, Length Tolerance +/-2.000 in, 6 in Overall Width, Width Tolerance +/-0.044 in, 0.5 in Thickness, Thickness Tolerance +/-0.009 in, Fabrication Extruded, Heat Treatment Pre-Hardened, Heat Treatable Yes, Mechanical Finish Mill, Yield Strength 37,000 psi, Tensile Strength 42,000 psi, 95 Brinell Hardness, B95 Rockwell Hardness, Includes Material Certificate Yes, Standards ASTM B221, AMS QQ-A-200/3, Minimum Temperature -320 Degrees F