Flat Bar Stock Aluminum 6061 T6511 Sheet 12 in Overall Length Length Tolerance +/-1.000 in 6 in Overall Width Width Tolerance +/-0.044 in 0.25 in Thickness Thickness Tolerance +/-0.008 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