Weld overlay/Cladding between Carbon steel & Inconel 625 1

[paavainathan]

Dear all,
In Valves to avoid contact between two dissimilar material (Carbon steel and Inconel 625/DSS trim parts)cladding/weld overlay will be applied on contact area.
Can any one give guidlines to select suitable cladding /weld overlay material for below combination.
1. Carbon steel and Inconel 625 Trim
2.Carbon steel and Duplex stainless steel Trim

Thanks,
Vaithiyanathan

 

[metengr]

For question 1) above, AWS 5.14 ERNiCrMo-3 (Inconel 625 filler metal) with either gas metal arc or gas tungsten arc welding processes for the interface between CS and Inconel 625.

For question 2) above, 309 or 309MoL for the interface between duplexx ss and CS.