Valve material commonly means the material of the valve body, it is the biggest part in a valve product. To be used in different working conditions and environments, the industry valves are designed from many different materials. When you choose the valve material, you should know the pressure and temperature ratings, besides that you need to evaluate the working media to take in consideration corrosive and erosive properties. Additionally, the engineer also should consider thermal and physical shock, line stress and fire hazards etc. Then you should know the material properties of the valve materials include tensile strength, wear resistance, thermal expansion, corrosion resistance and creep resistance.

About the materials of other parts in a valve, it is more complicated job, we have to consider every factor to make the decision.
The valve body materials could be made from casting、forging or other methods, the regular material are listed following: