... Steel Grade: Gr. A/B/C, X42-X80, Q235 Standard: ASTM, API, BS, JIS, GB, DIN Brand Name: YF SSAW ... 20MnG, 25MnG, 15MoG, 20MoG, 12Cr1MoVG, 15CrMoVG, 12Cr2MoG, 12Cr2MoWVTiB, 12Cr3MoVSiTiB,ASTM A106-96aATSM A213-95aJIS G3461-1988JIS G3462-1998DIN 17175-1979BS3059Part ... low and Medium Pressure Boilers GB3087-199910, 20ASTM A179, ASTM A192ASTM SA179,SA192,BS3059Seamless Steel Tubes for high pressure -- ...