Form: This specification covers a low-carbon steel in the form of welding wire. Application: This wire has been used typically as filler metal for gas-tungsten-arc or gas-metal-arc welding of parts fabricated from low-carbon and low-alloy steels@ but usage is not limited to such applications. Classification: Wire supplied to this specification is classified as follows: Type 1 ?C Copper coated Type 2 ?C Bare Type 1 shall be supplied unless Type 2 is specified