Form: This specification covers a corrosion and heat resistant nickel alloy wire in the form of covered welding electrodes. Application: Primarily for shielded-metal-arc welding of parts fabricated from alloys of similar or dissimilar composition@ particularly when the weld zone is required to have corrosion and heat resistance comparable to that of the parent metal. Classification: Coverings shall be suitable for welding in all positions using DC reverse polarity (electrode positive).