Precision, speed, and material versatility matter greatly in the metalworking industry. CNC plasma cutting uses a high-temperature ionized gas (plasma) to cut metals with precision, and its greatest strength is material flexibility. So which metal materials can be cut with CNC plasma cutting? In this article we cover the material range of plasma cutting and the specific requirements of each material.
CNC Plasma Cutting and Material Compatibility
CNC plasma cutting is an automated cutting system that operates according to predetermined digital design data. An electric arc heats a gas and turns it into plasma; this high-energy jet melts the metal and blows it away along the cutting line.
The decisive rule here is this: plasma cutting only works on metals that conduct electricity. Unlike oxy-fuel cutting, it does not depend on an oxidation reaction, so it can also cut materials like stainless steel and aluminum where oxy-fuel cutting does not work.
Carbon Steels
Carbon steel is the most commonly used metal type in industrial applications. CNC plasma cutting is ideal for cutting carbon steel sheets of different thicknesses quickly and cleanly. Cutting parameters are optimized based on carbon content. On carbon steel, plasma's rival is oxy-fuel cutting; as thickness increases, oxy-fuel gains the economic edge.
Stainless Steels
Thanks to their high resistance to corrosion, stainless steels are used across a wide range of applications, from the food industry to medical equipment, and from architecture to the chemical industry. Oxy-fuel cutting does not work on this material — the chromium oxide layer prevents burning. This makes plasma the only economical thermal alternative for stainless steel.
Aluminum and Its Alloys
Known for its light weight, corrosion resistance, and good conductivity, aluminum is widely used in aerospace, automotive, electronics, and packaging industries. Aluminum's high thermal conductivity changes the cutting settings: because heat dissipates quickly, different current and gas combinations are required.
Copper and Its Alloys
Copper and brass are used in the electrical-electronics industry, heat exchangers, and decorative applications due to their excellent electrical and thermal conductivity. Cutting these metals requires special attention because of their high conductivity.
Titanium
Titanium is critically important in aerospace, aviation, and medical sectors thanks to its high strength, low density, and superior corrosion resistance. Because of its reactivity, gas selection is decisive when cutting titanium; an incorrectly chosen gas can make the cut edge brittle.
Materials That Cannot Be Cut
The limit of plasma cutting is clear: non-conductive materials cannot be cut. Since an arc cannot form on materials such as wood, plastic, glass, composites, and ceramics, plasma cannot be used on them.
Consumable Use Varies by Material
An often overlooked point: material affects not only cutting quality but also consumable life. Highly conductive metals and thick sections accelerate nozzle and electrode wear.
Post-Cutting Operations
Plasma cutting naturally produces some slag and a slight edge angle deviation. Burr removal after cutting, grinding when needed, and edge preparation for surfaces to be welded should all be planned in advance.
CNC Plasma Cutting with DMK Makina
DMK Makina offers CNC plasma cutting service at its production facility in Lüleburgaz. Cutting parameters are determined individually based on material type and thickness; piercing strategy and part nesting are planned to reduce both scrap and consumable use. We are here with engineering support for your cutting work in the Thrace and Marmara region.