Welding Alloy625
Welding Alloy625
(OP)
I have a pretty basic question I guess... We are going to be doing some welding on a non pressure piece of equipment and it is constructed out of inconel 600. This equipment typically operates between 1400*F and 800*F. We typically use a ENiCrMo3 filler to repair cracking. That is also what the WPS calls out. My question is, would ENiCrMo4 comply or match the chemical properties needed? Thanks in advance!





RE: Welding Alloy625
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RE: Welding Alloy625
RE: Welding Alloy625
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Plymouth Tube
RE: Welding Alloy625
I'll suggest to use the inconel 82.
I don't know which is you r service but i've found a lot of paper on cracking of alloy 600 and care should be taken in select the correct filler metal.
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http://www.corrosionist.com
RE: Welding Alloy625
Of course they prefer you use their products, but, Special Metals offer very good technical support.
RE: Welding Alloy625
RE: Welding Alloy625
RE: Welding Alloy625
RE: Welding Alloy625
RE: Welding Alloy625
RE: Welding Alloy625
RE: Welding Alloy625
RE: Welding Alloy625
You'll have thermal fatigue problems regardless of whether the tube welds were originally post weld heat treated. Since you've made the repairs with the stronger filler metal, you can only wait to find out when you will need to repair again. Assuming that no change in operating parameters will occur and the current heating and cooling rates will not change, I suspect that the cyclic thermal strains incurred will be more greatly concentrated in the Alloy 600 HAZ or at the fusion line resulting in fewer operating cycles to the next weld repair.
RE: Welding Alloy625
A better solution would be a ENiCrFe-3 since it is insucceptible to embrittlement.