Welding cast Hastelloy C276
Welding cast Hastelloy C276
(OP)
I need to develop procedures for welding ASTM A494 CW12MW, the cast version of Hastelloy C276. I hope eventually to have procedures and qualifications in SMAW and GTAW, with and without PWHT. We will be welding our own castings.
Would you recommend welding with matching consumables or would Hast C22 type consumables be a better bet?
Thanks
Would you recommend welding with matching consumables or would Hast C22 type consumables be a better bet?
Thanks





RE: Welding cast Hastelloy C276
What is the service application for the castings?
RE: Welding cast Hastelloy C276
Be aware that proper deoxydation practices must be employed in the melting process used for Nickel base alloy castings to preclude hot cracking along the grain boundaries in the casting HAZ.
RE: Welding cast Hastelloy C276
@ stanweld: You are correct, this is for casting repair. This is a large project for us - we are reviewing all melting/casting practices.
RE: Welding cast Hastelloy C276
If it were me I would repair the castings using matching filler metal and perform a re-solution treatment. This is your best bet if you do not know the service duty.
RE: Welding cast Hastelloy C276
RE: Welding cast Hastelloy C276
In general that is true, but since C22 filler is often specified for C276, it might be acceptable here. The specific application (i.e., corrosive environment) needs to be considered.