sdzayisteel.en.made-in-chinaChina Seamless Steel Pipe St35.8 St45.8 17mn4 19mn5 Steel Pipe is a leading private steel production enterprise in China.The company has passed ISO9001 quality management system certification and CE certification.Our products include carbon steel pipe , welded pipe , spiral welded pipe , precision steel pipe , rectangular pipe , galvanized pipe , pipeline pipe , insulation pipe , etc., according to the American ASTM standard st45 8 pipeDIN 17175 St45.8 Carbon Steel Pipes & Tube SpecificationsDIN 17175 St45.8 pipesfactory 2018-11-12T13:22:47+00:00 DIN 17175 Seamless Tubes of Heat-resistant Steels Chemical Composition of DIN 17175 St45.8 Carbon Steel Pipes