Final answer:
In SMAW or MIG welding, .036 wire is used for its suitability for welding thinner materials or out-of-position welds, offering a stable arc and minimal spatter.
Step-by-step explanation:
The use of .036 wire in Shielded Metal Arc Welding (SMAW), sometimes referred to in the question as SM, is typically chosen based on the application requirements such as the thickness of the metal being welded, the desired strength of the weld, and the welding position.
A wire that is .036 inches in diameter is considered relatively thin; it may be used for welding thinner materials or for out-of-position welding, where a smaller, more controllable weld bead is necessary.
This size wire can provide a more stable arc and less spatter, facilitating a cleaner welding process and is used with gas metal arc welding (GMAW) machines, commonly known as MIG welders.