1.Seamless Steel Square Pipe 2.Standard:GB/T3094-2000,GB/T6728-2002 ASTM A500 EN10219 3.Material:Q235,Q345,20#,45#,16Mn Products description1.Name of commodity:Seamless Steel Square Pipe2.Standard: GB/T3094-2000,GB/T6728-2002 ASTM A500 EN10219 3.Material:Q235,Q345,20#,45#,16Mn4.Size:30*30*1.0-2.5mm to 200*200*2.5-10mm3.