Form: This specification covers a corrosion and heat-resistant cobalt alloy in the form of covered welding electrodes. Application: These electrodes have been used typically for shielded-metal-arc welding of parts fabricated from material of similar composition@ particularly when the weld zone is required to have corrosion and heat resistance comparable to that of the parent metal@ but usage is not limited to such applications. Classification: The electrodes covered by this specification are classified as follows: Type A - DC Type B - DC - AC Type C - DC Type D - DC ?C AC When DC is specified@ reverse polarity (electrode positive) is required. If a type is not specified@ Type A shall be supplied. Lime-type coverings are required for Types A and C electrodes.