Oftaj materialoj de velditaj kvadrataj tuboj estas: Q235A, Q235C, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00cr19ni118bn, 00cr19ni118bn, 10cr118bn, 10cr118n, 10cr118n, 118, 118, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19.