Nitrogen as a backing gas for welding stainless steel
Nitrogen as a backing gas for welding stainless steel
(OP)
Does anyone have any experience of using Nitrogen as a backing gas for the welding of stainless steel - in particular duplex grade 1.4362 to EN10088 (ASTM S32304)?
The torch shielding gas will remain as Argon/2% Nitrogen. The steel is in sheet form 1.0mm thick butt welded using ASTM S32205 filler wire.
The torch shielding gas will remain as Argon/2% Nitrogen. The steel is in sheet form 1.0mm thick butt welded using ASTM S32205 filler wire.





RE: Nitrogen as a backing gas for welding stainless steel
Although I haven't used it for welding duplex grades of SS I have used it on a number of occasions for back purging of 304 & 316 grades of SS with great success. I would even go so far as to say that the finished appearance of the welds looks better than when using Argon purging.
RE: Nitrogen as a backing gas for welding stainless steel
[Note: this document was cancelled as of 10 Sept. 1999]
RE: Nitrogen as a backing gas for welding stainless steel
Matt Nousak, P.E.
Senior Staff Engineer
Middough Associates Inc.
nousakmj@middough.com
RE: Nitrogen as a backing gas for welding stainless steel
MOB1