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Welding Hastelloy C276 to 304 Stainless Steel?

December 14, 2011

Q. Hi I'm new to this site and wondered if any welders out there can help me out.

I've spent many years as a welder and most of them as a T.I.G specialist mainly on SST, carbon steel and aluminium, but I have been asked on this occasion to weld something new to me and need a bit of guidance.

I need to weld Hastelloy c276 bellows (.15 mm thick) to a stainless steel body roughly 20 mm thick but with a weld prep machined into it. Normally with stainless to stainless its not a problem. Usually an autogenous weld, about 10-12 amps and a rotation speed of 1.2 rpm (bellow is 60 mm dia.) Usual gas used 98.5% argon-1.5% hydrogen

My question is, can this be done successfully and are there likely to be any problems from a metallurgy point of view, etc?

Any help you can give, guys, will be greatly appreciated.

Thanks

Chris

Chris Wickham
Shop Floor welder - Hastings, East Sussex, England