A18 steel MIG welding wire is a copper-coated, double-deoxidized wire that is designed for use on low and medium tensile steels. It is the most common type of MIG welding wire and is widely used in a variety of applications, including steel construction, boiler and tank fabrication, automotive manufacturing and repair, and general maintenance and repair.

A18 steel MIG welding wire produces a high-quality weld with good mechanical properties and impact toughness. It is also easy to feed and work with, making it a popular choice for both beginners and experienced welders.