20X20mm Ms Square Steel Tube for Building Material

What kind of pipe/tube can we do? ms square steel tube 20x20 mm steel for building material We have eight manufacture lines,10mm*10mm-1000mm*1000mm square tubes;10mm*20mm-800mm*1000mm rectangular tubes, thickness:0.3mm-50mm,over 2800 kinds of specifications. The steel grade that we can do show as the following sheet: Executive standard China GB/T3094-2000 GB/T6728-2002 Europe EN10210-2006 EN10219-2006 German DIN17100-80 America ASTM A106/A500 Japan JIS G3466 Steel grade Q195, Q215, Q215B S185 ST33  SS330 Q235B S235JR ST37-2 Gr. A SS400 Q235C S235J0 ST37-3   Q345B…