Carburizing, Nitriding, and Hardening
Expert solutions to help you succeed
Covai Air Products’ Atmosphere Solutions are available for carburizing, neutral hardening, carbonitriding, nitriding, and nitrocarburizing. Nitrogen, methanol, and/or a small amount of enriching gas are blended at the furnace to provide a furnace atmosphere essentially identical in composition to that of endothermic. By varying the amount of enriching gas, the furnace carbon potential can be adjusted to meet your specific atmosphere requirements. The benefit of Covai Air Products’ Atmosphere Solutions is superior atmosphere control for consistent part quality, operational cost savings, significant increases in operational productivity, and ease of operation.
Carburizing, Nitriding, and Hardening Expertise and Solutions
Improved operational efficiency and safety
A control system increases flow with a nitrogen purge during charging, quenching, or furnace malfunction, enhancing operation efficiency and safety
High-pressure gas quenching solutions
Gas supply systems up to 40 bar using nitrogen, argon, or helium are available
Improved quality of carburized, nitrided, or hardened components
Covai Air Products’ Atmosphere Solutions for carburizing, nitriding, and hardening provide an excellent means to improve the quality of metal products
Reduced costs
Elimination of endo-generation and its associated maintenance produces the greatest impact on cost reduction
Controlled furnace carbon potential
The furnace carbon potential can be adjusted to meet your specific atmosphere requirements
Customized high-pressure gas storage
High-pressure gas storage is custom-designed and optimized to meet the specific requirements of the process and quench frequency
Each Atmosphere Solution is Customized for Your Needs
We can help you choose the right atmosphere composition.
- Select and provide blending and flow control equipment
- Perform on-site atmosphere analyses for consistent dimensional control, carbon control, and physical and metallurgical properties
- Optimize your furnace process to lower operating costs
- Perform state-of-the-art metallographic and chemical analyses (SEM, ESCA, SAM, ISS, SIMS)
- Provide safety training
- Test atmospheres using your parts in our lab furnaces
- Demonstrate our system at your facility

Industrial Gas Audits and Leak Detection Services
Cap Provides Audits and leak detection services can be comprehensive assessments of the entire gas supply system, or specific to gas or process equipment that uses the gas.


In Short,
Covai Air Products gases, typically provided in gaseous and liquid form, enable customers in a wide range of industries to improve their environmental performance, product quality, and productivity.
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Compressed argon gas and liquid argon in a variety of purities and in various modes of supply around the world thanks to our network of storage and transfill facilities.
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An inert gas for cryogenic, heat transfer, shielding, leak detection, analytical and lifting applications
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Valued for its reactive and protective properties, and used by many industries such as electronics, foods, glass, chemicals, refining and more can benefit from its unique properties to improve quality, optimize performance and reduce costs.
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Useful as a gas, for its inert properties, and as a liquid for cooling and freezing. Virtually any industry can benefit from its unique properties to improve yields, optimize performance and make operations safer.
Get in touch with our technical experts.
Let us help you determine how to maximize the benefits of Carburizing, Nitriding, and Hardening.