This specification covers a corrosion and heat resistant steel in the form of welding wire. This wire has been used typically as filler metal for gas-tungsten-arc or gas-metal-arc welding of critical weldments of precipitation-hardenable, corrosion and heat resistant steels of similar composition comparable to those of the parent metal, but usage is not limited to such applications. This filler metal provides joints with increased crack resistance over those using AMS 5805 wire when welding similar steels.