.045 MIG wire is a type of welding wire that is commonly used in gas metal arc welding (GMAW) applications. This wire is made from a solid steel core and is coated with a thin layer of copper. The diameter of this wire is 0.045 inches (1.14 mm).
This type of welding wire is often used for welds that are 1/8 inch (3 mm) or less in thickness. It can be used on both ferrous and non-ferrous metals, but it works best on thinner materials. .045 MIG wire also produces less spatter than other types of welding wires, which makes it ideal for use in clean environments or when aesthetics are important.