Monday, October 18, 2010

[MW:7625] SA-335 Grade P12 and P22

hi all,

what is the main practical difference between these two alloys:
1- SA-335 Grade P12 (USA / ASME) Cr(0.8-1.2) Mo(0.44-0.65)
2- SA-335 Grade P22 (USA / ASME) Cr(1.9-2.6) Mo(0.8-1.1)

Is it possible to substitute the second item with first one?
We are going to use them in boilers?

thanks a million


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