1015 Carbon Steel Square Tube Material Carbon Steel Material Grade 1015 Inside Height 1 1/2 in Inside Width 1 1/2 in Outside Height 2 in Outside Width 2 in Overall Length 6 ft Fabrication Hot Rolled Mechanical Finish Mill Wall Thickness 0.25 in Heat Treatable Yes Heat Treatment No Heat Treatment Yield Strength 46 000 psi Rockwell Hardness Not Rated Tensile Strength 50 000 psi Machinability Not Rated Shape Square Tube Length Tolerance +0.125/-0 in Standards ASTM A500 Grade B