There are a few materials that you should avoid cutting with a plasma cutter. These include:
Aluminum
While aluminum is a conductive material, it tends to melt and distort when cut with a plasma cutter. This can damage your cutter and create a messy, unusable piece of aluminum.
Cast iron
Cast iron is extremely hard and brittle, making it difficult to cut with a plasma cutter. In addition, the high heat generated by the cutter can cause the iron to shatter.
Copper
Copper is another conductive material that can be damaged by the high heat of a plasma cutter. It’s also difficult to cut cleanly, so you’re likely to end up with a messy, unusable piece of copper.
So, there you have it – a few materials that you should avoid cutting with your plasma cutter. Stick to cutting stainless steel and other metals, and you’ll be sure to get the best results.