Welding Duplex to 90/10 Cu/Ni
Welding Duplex to 90/10 Cu/Ni
(OP)
I am wanting to make up a funnel using a duplex 31803 reducer welded to a 90/10 Cunifer fitting, hence no pressure or corrosion issues to worry about, I just need to be able to join them together. (I am offshore and have limited access to materials).
I am think of using Inconel 625 as a filler rod. Does anyone see any problems or offer an alternative suggestion?
I am think of using Inconel 625 as a filler rod. Does anyone see any problems or offer an alternative suggestion?





RE: Welding Duplex to 90/10 Cu/Ni
Dilution with Cu in alloy 625 weld meatl may prove unacceptable. As a general rule Cu should not exceed 15% in Inconel type filler metals to prevent hot cracking.