Metrode Ultramet-B347H description: Used to weld titanium and niobium stabilised 18/8 high carbon stainless steel types 321H and 347H. Applications include catalytic crackers (cat crackers), cyclones, transfer lines, furnace parts, steam piping, superheater headers, some gas and steam turbine components, used in petrochemical, chemical process plants and in power generation industries.
Note that the alloy 16.8.2 (data sheet C-12) was developed as a more ductile alternative to 347H consumables to avoid in-service HAZ failure in 347H base material of >12mm thickness.