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Acceptable filler for alloy 20 Stainless Steel

Acceptable filler for alloy 20 Stainless Steel

(OP)
What is the best filler metal for GTAW welding of Alloy 20 stainless steel pipe?

RE: Acceptable filler for alloy 20 Stainless Steel

Use SFA 5.14 ERNiCrMo-9

RE: Acceptable filler for alloy 20 Stainless Steel

The "best" is somewhat subjective. Least cost? Most corrosion resistant?

We use E/ER320LR, E/ERNiCrMo-3 and other more corrosion resistant Nickel base filler metals; e.g., E/ERNiCrMo-4, etc.   

RE: Acceptable filler for alloy 20 Stainless Steel

What about ER 320LR? This is the recommended filler wire by some  manufacturers?

Andy

RE: Acceptable filler for alloy 20 Stainless Steel

Yes, this could be used. What is the service application of the 20Cb-3 stainless steel?

RE: Acceptable filler for alloy 20 Stainless Steel

If they are using 20 them I assume that they are after acid resistance.
I which case you had better use a stabilized 20 chemistry for filler.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Acceptable filler for alloy 20 Stainless Steel

Welds made with ER320 are highly susceptible to hot cracking. the use of ER320LR greatly minimizes its potential.  

RE: Acceptable filler for alloy 20 Stainless Steel

I concur with stanweld; welding with 320 can be tricky because things need to be kept ultra-clean to avoid hot cracking.  It might be easier to resort to some of the Ni alloys already posted above.   

RE: Acceptable filler for alloy 20 Stainless Steel

In my experience cleanliness is critical when welding any of the  Ni alloys.  ER320LR should be fine from a welding standpoint.  We use it regularly.  Use the same good practices you would use for any Ni alloys and you'll be fine.   

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