Heat Treating

Heat treating for metals and materials processing

Made to Last

Toughen up your metals with some help from Praxair. Our heat treating applications enhance the strength and durability of metal, and we’ll work with you to produce the most durable metals for today’s demands. Heat treatment involves a number of controlled heating and cooling operations with an end goal of improving the structural and physical properties specific to the metal's use. The results vary, but they all involve heating, soaking, and cooling, depending on the process.

We offer a diverse portfolio of heat treating applications that can improve the quality and appearance of your metals, help you make highly reproducible parts and give you more control over your process. We can help you find ways to effectively treat your metals, so you never have to choose between cost and quality.



Praxair’s hydrogen and nitrogen gases are used in various forms of annealing. Annealing is the process of heating steel above the transformation temperature and slowly cooling it to increase the workability of the metal. Nitrogen or hydrogen-based atmospheres are also required to achieve a bright annealed surface finish. We have developed technologies to help you obtain atmosphere uniformity and maximize your part quality.

Learn more about annealing


Brazing parts in furnace

Brazing is a joining process that heats filler metal and evenly distributes it between two parts. Furnace brazing is commonly used when large batches of parts are to be processed at one time. We provide a reducing atmosphere to help you produce higher quality joints, with controlled heat temperatures and improved production rates.

Learn more about brazing

Carburizing & Hardening

Carburizing Furnace

Carburizing is a heat treatment process in which steel absorbs carbon while the metal is heated. Our technology provides ideal conditions for better control and repeatability.

Learn more about carburizing and hardening

Gas Quenching & Inerting

Gas Quenching

Furnace inerting and parts quenching are common heat treating applications. We offer gases in a variety of supply systems to meet your process requirements. 

Learn more about quenching and inerting


Gears Sintering

The sintering process uses compressed metal or ceramic powders to form various shapes. Our atmosphere gases help achieve a consistent performance for your sintering operation.

Learn more about the sintering process