A36 + 8620 welding

[davidhiep86]

Welding A36 to 8620 (or 8610) would you tig or mig? what filler? What would you not use.
Has to hold 50k psi.

 

[Richard.]

Has the 8620 been through any hardening treatment?

 

[Richard.]

I'm no expert on this I can only go on what I've picked up but the 8620 can be welded before it's been through any form of surface hardening with a low hydrogen filler material. After wards is a bit more tricky as the surface carbon content is much higher making it prone to cracking. In this case to stand a chance you need a good pre heat, high strength filler and slow cooling. I'm not going to recommend a filler as that is better advised from someone who has done this before. I have not
What is it your welding exactly