What Gas Does A Plasma Cutter Use?

Plasma cutting is a popular method for cutting through metal and other conductive materials. This process uses high-temperature plasma to melt through the material, creating a precise cut. But, what gas does a plasma cutter use? In this article, we will explore the different gases used in plasma cutting, their roles in the cutting process, and how to choose the appropriate gas for your cutting needs.

The Role of Gas in Plasma Cutting

Gas plays a critical role in the plasma cutting process. The gas used in plasma cutting helps to create the plasma arc, which is what melts through the material being cut. The gas also helps to cool the cutting area and remove the molten metal from the cut.

Different gases have different properties that affect the plasma cutting process. For example, some gases create a hotter plasma arc, while others are better at cooling the cutting area. The gas used in plasma cutting can also affect the quality of the cut, such as the smoothness of the edges and the amount of dross produced.

Common Gases Used in Plasma Cutting

There are several gases commonly used in plasma cutting. These include:


Oxygen is a popular gas used in plasma cutting, as it creates a very hot plasma arc. This makes it ideal for cutting through thicker materials quickly. However, the use of oxygen can also create more dross, which is the molten metal that solidifies on the cut edge.


Nitrogen is another popular gas used in plasma cutting. It creates a cooler plasma arc than oxygen, which can result in a smoother cut edge. Nitrogen is also less reactive than oxygen, which means it produces less dross. Nitrogen is often used for cutting thinner materials or for creating a clean, precise cut.

Stay tuned for the next section, where we will discuss the other gases used in plasma cutting and the factors to consider when choosing the appropriate gas.

Common Gases Used in Plasma Cutting


Argon is a less common gas used in plasma cutting, but it has some unique properties that make it ideal for certain applications. Argon creates a very stable plasma arc, which makes it suitable for cutting materials that are highly reactive, such as titanium and aluminum. It also produces less dross than oxygen, making it a good choice for creating clean, precise cuts.


Air is another gas that can be used in plasma cutting. It is readily available and inexpensive, but it does have some limitations. Air creates a relatively cool plasma arc, which can make it difficult to cut through thicker materials. It also contains moisture and other impurities that can affect the quality of the cut.

Factors to Consider in Choosing the Gas for Plasma Cutting

When choosing the appropriate gas for plasma cutting, there are several factors to consider. These include:

Material being cut

Different materials require different gases for optimal cutting performance. For example, oxygen is ideal for cutting through steel, while nitrogen is better for cutting through aluminum.

Thickness of material

Thicker materials require a hotter plasma arc, which means a gas such as oxygen may be necessary. However, thinner materials may require a cooler plasma arc, which means nitrogen or argon may be more suitable.

Cutting speed

The cutting speed can also affect the choice of gas. For example, if you need to cut through a large volume of material quickly, a gas such as oxygen may be necessary to produce a hot plasma arc and a fast cutting speed.

By considering these factors and selecting the appropriate gas, you can ensure that you achieve the best possible results when using a plasma cutter.

Tips for Proper Gas Usage in Plasma Cutting

Using the appropriate gas pressure and flow rate is crucial for achieving the desired cut quality and prolonging the life of the consumables. The gas pressure should be set according to the manufacturer’s recommendations and the thickness of the material being cut. The flow rate should also be adjusted accordingly to ensure proper cooling of the cutting area and removal of the molten metal.

Proper gas handling and storage are also essential for plasma cutting. The gas cylinders should be stored in a cool, dry place, away from direct sunlight or heat sources. The cylinders should also be secured properly to prevent them from falling over or being knocked down. When replacing the gas cylinder, be sure to check the valve and regulator for any damage or leaks.


In conclusion, the gas used in plasma cutting plays a crucial role in achieving the desired cut quality and prolonging the life of the consumables. The choice of gas depends on the material being cut, its thickness, and the desired cut quality. Oxygen is ideal for cutting thicker materials, while nitrogen is better for thinner materials or producing clean, precise cuts.

It is also essential to use the appropriate gas pressure and flow rate and handle and store the gas cylinders properly. By following these tips, you can achieve the best possible cut quality and prolong the life of your consumables.

At Lil Angel Gifts , we understand the importance of using the appropriate gas in plasma cutting. Whether you are a professional metalworker or a DIY enthusiast, our website offers the latest reviews and tips for plasma cutters and other technology products. Be sure to check out our website for the latest updates and recommendations.

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