Nitriding Companies

IQS Directory provides a comprehensive list of nitriding companies. Use our website to review and source top nitriding companies with roll over ads and detailed product descriptions. Find nitriding companies that can design, engineer, and provide nitriding services to your companies specifications. Then contact the nitriding companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product new articles. Whether you are looking for manufacturers of nitrite hardening, salt bath nitriding, liquid nitriding, or customized nitriding of every type, this is the resource for you.

  • Russellville, IN

    Metal Forming Industries offers unparalleled heat treating. Our robust solutions are entirely customer-centric, and come at a very affordable price. We are the suppliers that will always put you as our priority. We keep your production goals in mind, which is why you will receive your products in a short amount of time. Contact us to learn more!

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  • Westland, MI

    We offer worry-free nitriding services. These items come with exceptional value and we utilize advanced methodology for all of our procedures. These sophisticated items come at an affordable price. We will work closely with you to determine the best products for you! If you already know your specifics then just give us a call today! We are ready to speak with you!

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  • Cleveland, OH

    Euclid Heat Treating Company was founded in 1946 and has been providing quality nitriding services ever since. We pride ourselves in offering 100% on-time delivery and 100% quality and reliability. It is our mission to always be fair and ethical while meeting all of our customers’ expectations. Our team of dedicated employees would love to answer any questions you may have. Visit our website today!

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  • Cincinnati, OH

    Are you in need of nitriding services? Our engineers will provide you with consistent and long-lasting satisfaction. The capabilities of our company is unmatched. We honor all customer deadlines with one of the best on-time deliver records in the industry. If you are interested in more details then please give one of our representatives a call today! Our engineers are ready to work diligently on your projects!

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  • Loves Park, IL

    Founded in 1956, Progressive Steel Treating is an industry leader, providing high quality services including nitriding. We operate three shifts, seven days a week and offer pick-up and delivery. The dedicated members of our team have extensive backgrounds in heat treating, engineering, production and manufacturing. Call us today; we look forward to hearing from you!

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businessIndustry Information


Nitriding is a case hardening operation that diffuses nitrogen into metal parts and components to create a strong and durable outer layer. Unlike other coatings and plating techniques, there is no risk of delaminating with nitriding as the nitrogen is actually fully alloyed or incorporated into the surface of the metal.

While steel and its alloys have long been treated through nitriding, it is gaining popularity for applications involving other metals such as cast iron, aluminum, molybdenum and titanium. Metallurgical, construction, shipping, tool and die and other high stress machining applications frequently use nitriding which is faster, more precise and more readily reproduced than many other case forming heat treatments.  Cold wall and hot wall furnaces are used to heat parts and nitrogen rich gases, liquids or solids in order to enact case hardening. With either type of furnace temperature regulation is integral to the success of nitriding as it is with many other forms of heat treating. Non-uniform temperatures can lead to increased distortion and uneven stresses which could result in unpredictable product performance and even potentially hazardous mechanical failure. Uneven surface hardness, thickness and case depth may also result from inadequate temperature regulation during the nitriding process. Technological advancements allow for careful temperature monitoring of both the furnace atmosphere and the part itself to ensure the most effective treatment. Progressively more advanced, the nitriding process allows for a broad range of materials to be case hardened via the introduction and diffusion of nitrogen into the surface layers of industrial parts and components.

There are three main methods used to effectively infuse parts with nitrogen for increased hardness and durability. Each process is named for the technique used to implant nitrogen into the substrate. Gas nitiriding is a popular technique in which the gas ammonia is put in contact with a heated work piece. The heat allows the nitrogen present in ammonia to dissociate from the hydrogen and instead bond chemically and physically with the metallic component. Another technique is what is known as salt bath nitridng or cyaniding. Unlike other processes which may take hours, cyaniding takes as little as 30 minutes depending upon the metal and part being hardened. The process for salt bath nitriding is very simple. The part is placed in the bath of sodium cyanide which is heated to a temperature between 550 and 590 °C (1,022 - 1,094 °F). The component remains submerged for a period of time which is determined by the desired effect of nitriding. Though it was once exceedingly common, the use of cyanide salt baths continues to diminish as more environmentally friendly materials gain preference over the highly toxic cyanide. The third and final type of nitriding is known as plasma nitriding. This process, also known as ion nitriding or glow discharging is quickly becoming the most popular avenue for case hardening with nitrogen. At high voltage, nitrogen atoms are dissociated and accelerated to diffuse in the part. This heats the working surface which cleans and hardens it. In addition to improved strength and structural integrity, each of these nitriding methods offers enhanced performance, strain limits, fatigue strengths and product longevity when performed properly.