Which gas is the best choice for a plasma cutter? Gas is an essential component of the plasma cutting process, as it affects the quality and parameters of the cut. Plasma cutting is a technique widely used in industry for the precise cutting of various metals. Choosing the right gas is crucial for the quality and efficiency of the process. In this article, we will discuss which plasma gas to choose, taking various aspects into account. We encourage you to read on.
Which gas is the best choice for a plasma cutter? Gas is an essential component of the plasma cutting process, as it affects the quality and parameters of the cut. Plasma cutting is a technique widely used in industry for the precise cutting of various metals. Choosing the right gas is crucial for the quality and efficiency of the process. In this article, we will discuss which plasma gas to choose, taking various aspects into account. We encourage you to read on.
Plasma cutting — which gas?
The answer to the question “which gas to choose for plasma cutting?” is crucial for achieving optimal results. Each gas has its own specific properties, advantages and disadvantages, which determine its application in various industries. Here is detailed information about the individual gases used in plasma cutters.
Air – is the most commonly used gas in plasma cutting due to its availability and low cost. It is versatile and works well for cutting various materials. A disadvantage is the potential for edge oxidation, which reduces cut quality. Air is ideal for workshops and the metal industry, where low costs are key. However, it is important to bear in mind the higher wear and tear on electrodes and nozzles, which slightly increases operating costs.
Nitrogen – ideal for cutting stainless steel and aluminium, ensuring clean, unoxidised edges. It is more expensive than air but offers a higher quality of cut. Nitrogen is often chosen by the aerospace and automotive industries, where high quality standards are required.
Argon – works perfectly for cutting aluminium and non-ferrous metals, ensuring smooth and precise edges. It is relatively expensive, but the benefit is exceptional cutting quality.
Oxygen – used in specialist applications where a very high cutting temperature is required, ideal for very thick materials. Oxygen is used as a plasma gas when cutting unalloyed and low-alloy steels. Contact with oxygen reduces the viscosity of the molten material, making it more fluid. This, in turn, allows for edges free from slag contamination and top edges without unwanted rounding.
Gas mixtures – mixtures of gases, such as argon and hydrogen, combine the advantages of the individual gases, optimising cut quality. They ensure high precision and clean edges. Gas mixtures are best suited where every imperfection matters. Such solutions are used in industries where the highest cutting quality is a priority.
Criteria for selecting gas for plasma cutting
The type of material determines the choice of gas. Aluminium is best cut with argon, whilst stainless steel is best cut with nitrogen. The thickness of the material also influences the choice of gas. Oxygen is ideal for very thick materials, whilst thinner materials can be cut with air or nitrogen. High-quality cuts require gases such as argon or gas mixtures. Air is suitable for less demanding applications. Budget also determines the choice of gas. Air is the cheapest, whilst argon and gas mixtures are more expensive but offer better results.
We believe that after reading this article, choosing the right gas for a plasma cutter will no longer be a matter of doubt. Industrial machinery manufacturer CORMAK invites you to explore the full range of products in our shop. We offer, amongst other things, specialist industrial machinery and laser machines. Our range also includes:
