Detailed Product Description spiral welded tube (1) Materials: Q235A,Q236,OCr13,1Cr17,00Cr19Ni11,Q345,L245 ,1Cr18Ni90Cr18Ni11Nb ,10#,20#, ... ,K55 (4) Usage: oil and gas transmission, pipe, pier, Civil Engineering, building works etc. We also supply the following steel products:profileChannel ...