... Shape: Round Dingrun GB 8162 Seamless Steel Tubes And Pipes1)Business Type: Manufacture and sale2)The Length of Products: Can be set ... , and has more than 3500 tons’ manufacturing capability. The products focus on round and profiled cold-rolled precision steel tubes ... include 10#, 20#, 35#, 45#, 160Mn, 20GrMo, 35GrMo, 40Gr. The products have the characteristics of small-sized, heavy-wall thickness, high ...