In the laser cutting process, the selection of assist gas directly affects cutting quality, processing efficiency, and operating costs. Choosing the correct gas type and pressure is essential for maximizing the performance of a laser cutting machine.
Jinan EVER VIEW Machinery Technology Co., Ltd., with years of experience in laser cutting machine R&D and industrial applications, provides professional assist gas selection solutions to help manufacturers achieve better cutting results and lower production costs.
Assist gas plays multiple roles during laser cutting, including removing molten material, improving cutting speed, protecting the cutting surface, and controlling oxidation. Different materials require different gas types to achieve the best processing performance.
According to EVER VIEW's technical experience, assist gases used in laser cutting machines are mainly divided into two categories: cutting gases and protective gases. The commonly used gases include oxygen, nitrogen, and compressed air.
Oxygen is the preferred assist gas when cutting carbon steel. During the cutting process, oxygen reacts with the heated carbon steel surface and generates additional heat through oxidation, which improves cutting speed and increases processing efficiency.
For carbon steel applications, oxygen-assisted cutting can significantly reduce production time and processing costs, making it suitable for industries requiring high-volume metal fabrication.
When cutting stainless steel, aluminum alloys, copper, and other non-ferrous metals, nitrogen is commonly selected as the assist gas. Unlike oxygen, nitrogen prevents oxidation reactions during cutting.
Using nitrogen helps achieve a cleaner cutting edge with reduced discoloration, fewer burrs, and better surface quality, making it ideal for applications requiring high appearance standards and precision.
Compressed air can be used as an economical assist gas when cutting thin non-metallic materials or metal parts with lower precision requirements.
Compared with oxygen and nitrogen, air has lower operating costs and can effectively reduce processing expenses while maintaining acceptable cutting performance for suitable applications.
Besides selecting the correct gas type, gas pressure is another important factor affecting cutting performance. The required pressure should be adjusted according to the material type, thickness, and cutting requirements.
When supplying laser cutting machines, EVER VIEW provides customized assist gas recommendations based on each customer's processing materials, thickness requirements, and production goals.
The technical team also provides guidance on gas pressure adjustment and cutting parameter optimization, helping manufacturers improve cutting efficiency, maintain stable quality, and reduce overall operating costs.
The ideal assist gas depends on the material being processed and the required cutting performance:
| Material | Recommended Assist Gas | Main Advantages |
|---|---|---|
| Carbon Steel | Oxygen | Higher cutting speed and improved efficiency |
| Stainless Steel | Nitrogen | Oxidation-free surface and better edge quality |
| Aluminum Alloy / Non-Ferrous Metals | Nitrogen | Cleaner cutting surface and reduced discoloration |
| Thin Metals / Non-Metal Materials | Air | Lower cost and economical operation |
Selecting the correct assist gas is an important step in optimizing laser cutting machine performance. Oxygen, nitrogen, and air each provide different advantages depending on the material and processing requirements.
With professional experience in laser cutting technology, EVER VIEW helps customers develop suitable gas selection and pressure adjustment solutions to achieve efficient, stable, and cost-effective cutting operations.
