Alloy 625 is a nickel-chromium alloy used for high strength, excellent fabricability, and outstanding corrosion resistance. This filler metal is a common choice in sea water applications, aircraft, chemical processing, and nuclear facilities. Aerospace Material Specification 5837 is corrosion and heat resistant nickel alloy welding wire.
Further reading: Alloy AMS 5786 Corrosion.
Further reading: AMS 5838 nickel alloy welding wire.