supply high qulity erw steel tube with low price 1) Material:Q235,Q345B,20#,ST37, ST44, ST52, ASTM A53, ASTM A106 and so on2) Diameter:16-219mm, Thickness:0.8-10mm, Length:<13m3)Use: construction structure, machinery, hall structure,airport structure, shipbuilding and so on4) Packing: as usual export packing ERW steel pipe