Thanks for your post guys.
Gerhardl - The issue is that client is asking us to decide which material to accept and the justification for its acceptance. So i request you to help me in this regard. Kindly let me know what details you need in this regard. Or if any one can suggest me a good link...
Hi in one of the projects, the required material for Valve stem is A182 F316L, but the supplier has provided 2 options
1. AISI 4140
2. A182 F316,
Considering following design criteria, which one can be accepted.
1. Design Pressure - 63.5 Barg
2. Design temperature - 5 to 85 Deg Celcius