In gas metal arc welding (GMAW), also sometimes referred to as mig welding, a continuous wire electrode is fed through a welding gun and into the weld pool, joining the two base metals together. The welder has the option of using either a shielding gas or a flux-cored wire in order to protect the weld pool from contamination.
There are several factors that need to be considered when choosing the right shade lens for GMAW. First, you need to take into account the amperage range you'll be working in. Second, you need to evaluate the brightness of the arc; if it's too bright, it can cause eye damage. Finally, you should consider what type of metal you'll be welding; some metals reflect more light than others.
Based on these factors, here are some general guidelines for choosing the right shade lens for GMAW:
- If you'll be working in an amperage range between 30 and 150 A, use a #10 shade lens.
- If you'll be working in an amperage range between 40 and 200 A, use a #9-13 shade lens.
- For brighter arcs (200-250 A), use a #5-8 shade lens.
- When welding stainless steel or aluminum , which reflect more light than other metals, use a #3-4 shade lens.