Will Age Hardening Monel 400 give it any additional corrosion resistance to Ammonia environments or H2S environments? If yes, is the required age hardening process detailed somewhere?
I bet you meant Monel K500 which has similar composition but with 3% Al addition. K500 is age hardenable arising from Ni3(Ti,Al)precipitation. I donot see much of benefit for corrosion from aging but i could be wrong.