Form This specification covers a low-alloy steel in the form of welding wire. Application This wire has been used typically for filler metal for gas-metal-arc or gas-tungsten-arc welding of critical weldments of lowalloy steels requiring a joint capable of being heat treated to a strength level approximating that of the basis metal@ but usage is not limited to such applications. Classification Wire shall be classified as follows: Type 1 - Bare Wire Type 2 - Copper Coated Type 1 shall be supplied unless Type 2 is specified.