Material of Valve

There are nine commonly used materials for valve bodies：

• 1. Gray cast iron, suitable for working temperature between 15 ~ + 200 ℃, nominal pressure 1.6 Mpa or less low-pressure valve;
• 2. Malleable cast iron is suitable for the working temperature between 15 ~ + 250 ℃, nominal pressure 2.5 Mpa or less in the low-pressure valve;
• 3. Nodular cast iron, suitable for working temperature between 30 ~ + 350 ℃, nominal pressure 4.0 MPa or less in the low-pressure valve;
• 4. Carbon steel (WCA, WCB, WCC), suitable for working temperature in between – 29 ~ + 425 ℃, and high-pressure valves, including 16 Mn, 30Mn working temperature between 40 ~ + 450 ℃, commonly used to replace ASTM A105;
• 5. Low carbon steel (LCB), suitable for working temperature between – 46 ~ + 345 ℃ cryogenic valves;
• 6. Alloy steel (WC6, WC9), suitable for working temperature between – 29 ~ + 595 ℃ of the corrosive medium of high temperature and high-pressure valve; WC5, WC12 is suitable for the work in between – 29 ~ + 650 ℃ temperature corrosive medium of high temperature and high-pressure valve;
• 7. Austenitic stainless steel, suitable for working temperature in corrosion medium – 196 ~ + 600 ℃ between valves;
• 8. Monel alloy, mainly used in valves containing hydrofluorine;
• 9. Cast copper alloys, mainly are suitable for the working temperature between 273 ~ + 200 ℃ of oxygen pipe with a valve.

The listed above is the valve body commonly used materials in a large class, specific in each class of materials, and there are many different brands, a variety of different brands and applicable to a variety of different pressure levels. Therefore, in the choice of valve body material, should be based on different purposes and different pressure levels, determine suitability for the working condition of the valve body material.

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