C276 Filler Metals

[holdpt]

Our customer has requested ERNiCrMo-10 instead of the recommended ERNiCrMo-4 for the C276 joints. The service duty of this equipment is basically a door frame for a corrosive environment. Is the -4 not more resistant than the -10 because of a higher Ni content?

 

[metengr]

The service duty of this equipment is basically a door frame for a corrosive environment. Is the -4 not more resistant than the -10 because of a higher Ni content?

No. The critical alloy additions are Cr and Mo in combination. You can use the web site below for comparison between the two filler metals - C 276 and C22. The selection of the filler metal may be for dissimilar metal weld joints. The higher Mo content does provide for increased pitting resistance.

http://www.specialmetalswelding.com/products/prod.htm

 

[holdpt]

Thanks!

 

[fegenbush]

metengr is correct. I have used -10 to weld to carbon steel (dissimillar metals). I would ask the client to confirm that this is their choice to ensure that you are covered.

 

[EdStainless]

22 is often used as filler for 276, it is more corrosion resistant in almost all environments.
In addition to higher Mo it has less Fe, which does help these alloys.

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