Stainless Steel Flat Bar Stainless Steel 304 Square Bar 6 ft Overall Length Length Tolerance +/-1.000 in 1 in Overall Width Width Tolerance +0.000 in/-0.006 in 1.25 in Thickness Thickness Tolerance +0/-0.006 in Fabrication Cold Finished Heat Treatment Annealed Heat Treatable Yes Mechanical Finish Mill Yield Strength 30 000 psi Tensile Strength 75 000 psi 131 Brinell Hardness 74 Rockwell Hardness Includes Material Certificate Yes Standards AMS 5639 ASTM A276 ASTM A479