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Ductile iron valve material selection
For the nominal pressure PN ≤ 4.0MPa, the working temperature of -30 ~ 350 ℃ of water, steam, air and oil media ductile iron valve, the selection of the main parts of the material, see "Table 1": "Table 1" ductile iron Valve Material Selection Part Name Material Name Grades Standard No. Valve body, bonnet, opening and closing pieces, bracket ductile iron QT400-16, QT450-10, QT500-7 GB / T stem, shaft chromium stainless steel 1Cr13, 2Cr13, Cast aluminum bronze ZCuA18Mn2, ZCuA19Fe4Mn2 GB / T 1176-1987 cast iron Brass ZCuZn38Mn2Pb2 rocker carbon steel casting WCA, WCB, WCC GB / T quality carbon steel 20,25,35 GB / T 699-1999 cylinder, piston chromium stainless steel 1Cr13,2 Cr13, 3Cr13 GB / T 1220- 1992 Diaphragm austenitic stainless steel 1Cr18Ni9,1Cr18Ni9Ti GB / T 4237-1992 spring spring steel 500CrVA GB / TSi2Mn, 600Si2MnA float austenitic stainless steel 1Cr18Ni9, 1Cr18Ni9Ti GB / T 4237-1992 0Cr18Ni9Ti, 1Cr17Ni13Mo2Ti filter 1Cr18Ni9, 1Cr18Ni9Ti seat, opening and closing parts of the sealing surface of cast aluminum brass ZC UZn25A17Fe3Mn3 GB / T 1176-1987 cast manganese brass ZCuZn38Mn2Pb2 cast aluminum bronze ZCuA19Mn2, ZCuA19Fe4Ni4Mn2 stainless steel 1Cr13,2Cr13,1Cr18Ni9,1Cr18Ni9Ti GB / T 1220-1992 spray welding iron-based alloy powder FFe1 ~ 5 JB / T 7744-1995 PTFE Stem Nuts Cast Aluminum Bronze ZCuA19Mn2, ZCuA19Fe4Ni4Mn2 GB / T 1176-1987 Cast Manganese Yellow Copper ZCuZn38Mn2Pb2 Aluminum Flavonoid ZCuZn35A16Fe3Mn3 Filler Teflon SFT-1 ~ 4 HG2-538 Corrosion Asbestos - - Rubber - - Dip Teflon Asbestos Rope - - Flexible Graphite - - Handwheel Malleable Cast Iron KTH330-08, KTH350-10 GB / T 9440-1988 Ductile Iron QT400-15, QT450-10 GB / T Search Keyword: Technical Article Part Name Material Name Grade Standard Body, bonnet, opening and closing parts, Cast iron QT400-16, QT450-10, QT500-7 GB / T stem, shaft chrome stainless steel 1Cr13, 2Cr13, 3Cr13 GB / T 1220-1992 aluminum bronze QA19-2, QA19-4 GB / T 4423-1992 Manganese brass HMn58-2 GB / T 4423-1992 Bush cast aluminum bronze ZCuA18Mn2, ZCuA19Fe4Mn2 GB / T 1176-1987 Cast manganese brass ZCuZn38Mn2Pb2 Rocker carbon steel castings WCA, WCB, WCC GB / T Quality carbon steel 20,25,35 GB / T 699-1999 Cylinder, piston chromium stainless steel 1Cr13, 2Cr13, 3Cr13 GB / T 1220-1992 Diaphragm austenitic stainless steel 1Cr18Ni9,1Cr18Ni9Ti GB / T 4237-1992 spring spring steel 500CrVA GB / TSi2Mn, 600Si2MnA float austenitic stainless steel 1Cr18Ni9, 1Cr18Ni9Ti GB / T 4237-1992 0Cr18Ni9Ti, 1Cr17Ni13Mo2Ti filter 1Cr18Ni9, 1Cr18Ni9Ti Seat, opening and closing parts of the sealing surface Cast aluminum ZCuZn25A17Fe3Mn3 GB / T 1176-1987 Casting manganese brass ZCuZn38Mn2Pb2 Cast aluminum bronze ZCuA19Mn2, ZCuA19Fe4Ni4Mn2 Stainless steel 1Cr13,2Cr13,1Cr18Ni9,1Cr18Ni9Ti GB / T 1220-1992 Spray welding Iron base alloy powder FFe1 ~ 5 JB / T 7744-1995 PTFE - SFB-2, SFB-3 HG2-534 SFBN-1, SFBN-2, SFBN- Cast aluminum bronze ZCuA19Mn2, ZCuA19Fe4Ni4Mn2 GB / T 1176-1987 Cast manganese brass ZCuZn38Mn2Pb2 Cast aluminum flavone ZCuZn35A16Fe3Mn3 Filler PTFE SFT-1 ~ 4 HG2-538 Corrosion asbestos - - Rubber - - PTFE impregnated asbestos rope - - Flexible graphite - - hand wheel can be Cast iron KTH330-08, KTH350-10 GB / T 9440-1988 ductile iron QT400-15, QT450-10 GB / T