Our produced square and rectangular tubes come in full sizes: square tubes from 20*20 to 600*600, rectangular tubes from 20*30 to 400*800, with wall thickness ranging from 1.5mm to 32mm, and over 2,800 specifications. Materials include Q355B, Q355C, Q235, S275JOH, S355JOH, Q460, Q550, S275JR, S355JR, S355J2H, ASTM A500 square tubes, British standard square tubes, seamless square tubes, large diameter thick-walled square tubes, and square-rectangular tubes. Custom sizes according to customer-provided drawings and dimensions are also available.

Seamless steel tube materials include: Q345D, Q345B, Q345C, Q345E, Q355B, Q390B, 20#, 10#, 20#, 35#, 45#, 20#3087, 20G5310, Q345B, Q345C, Q345D, Q345E, 16Mn, Q355B, Q355C, Q355D, Q355E, 27SiMn, 20CrMo, 30CrMo, 35CrMo, 42CrMo, 20Cr, 30Cr, 40Cr, 15CrMoG, 12Cr1MoVG, 20CrMnTi, 37Mn5, 45Mn2, 40Mn2, 15CrMo, 12Cr1MoV, 1Cr5Mo, 10CrMo910, SA-210C, SA-106B, T12, P12, T22, P22, P91, T91, P92, T92. J55, K55, N80, P110, L245/x42, L290/x50.