... steel seamless steel pipe 2.Material: Q195, Q235, Q345, 10#, 20#, 45# etc., 3.Specification: 6-610* ... 1-30mm Typecarbon steel Seamless steel pipe /seamless steel tubeSpecification 6- ... 20cr,SAE1045API5L(GRB,X42,X52,X60);API5CT(P55,J55,N80,P110) etc.Application range1. Low ... transportation pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. ...