disimilar welding of 304L to A106 with nickel base filler

By James Kelly Date 04-17-2011 21:08

The Welding Institute, Great Britian, has a booklet Welding Dissimilar Metals, edited by N. Bailey, ISBN 0 85300158 8 which is useful.

Joining steel pipe to austenitic stainless, for any kind of elevated temperature service, does require a nickel alloy filler. This is not only to average out the differing thermal expansion coefficients of the base metals, but also to minimize the decarburized zone at the fusion line of the A 106.

I believe state-of-the-art is to use Inconel 82 bare wire (ERNiCr-3) or Inconel 182 (ENiCrFe-3) covered electrodes.

By js55

Date 04-20-2011 21:19

ENiCrFe-3 is a good choice. Good all position crack resistance. The Mn. Its development had the nukes in mind.
Of course, the Mn also creates a high temp instability which is why -2 is recommended at higher temps. But in dissimilars with CS its a who cares.
I'd go with the NiCr-3 though.