Hi, In our chemical company, the pipe spec for check valves prescribes stellited material for disc and seat. Now, suppliers are having a hard time meeting this specification. Are there other materials with comparable properties that are more commonly used? Mostly suppliers offer SS (eg A351 CF8M) Fluids go from water, nitrogen to hydrocarbons. Press/Temp starts at -28°C/9 bar over 50°C/18 bar to 350°C/4 bar Thanks!!