Valves commonly used materials for the temperature range Table Name Castings Forgings Description Grades Operating temperature ℃ Grade temperature ℃ Gray iron HT200HT250HT300HT350 -15 ~ 250 - - for low pressure valve PN ≤ 1.6MPa black heart forging KTH300-06KTH330-08KTH350-10KTH370-12 -15 ~ 250 - - Medium and low pressure valves for PN ≤ 2.5MPa Ductile iron QT350-22QT400-18QT400-15QT450-10QT500-7QT600-3QT700-2QT800-2QT900-2 -30 ~ 350 - - For medium and low pressure PN ≤ 4.0MPa Medium and low pressure valves Carbon steel WCA, WCB, WCC -29 ~ 425 20,25,35,40 -29 ~ 425 For medium and high pressure valves, 16Mn, 30Mn Commonly used on behalf of ASTMA105 16Mn, 30Mn -40 ~ 450 Low temperature carbon steel LCB -46 to 345 - - steel for low temperature valve WC6WC9 -29 ~ 595 15CrMo25Cr2MoV -29 ~ 595 high temperature and high pressure valve for non-corrosive medium C5C12 -29 ~ 650 1Cr5Mo -29 ~ 650 austenitic stainless steel ZG00Cr18Ni10ZG0Cr18Ni9ZG1Cr18Ni9TiZG0Cr18Ni9TiZG1Cr18Ni9TiZG0Cr18Ni12Mo2TiZG1Cr18Ni12Mo2TiZG1Cr17Mn9Ni14Mo3Cu2NZG1Cr18Mn13Mo2Cun -196 ~ 600 00Cr18Ni100Cr18Ni91Cr18Ni90Cr18Ni9Ti1Cr18Ni9Ti00Cr17Ni14Mo20Cr18Ni12Mo2Ti -196 ~ 600 for corrosive media austenitic stainless steel C F8CF8MCF3CF8CCN7M -L316L321B462 - For corrosive media Monel - - NCu28-2.5-1.5 -29 ~ 450 Mainly used in hydrofluoric dielectric bronze alloy ZCuSn3Zn11Pb4
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