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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.

  • Warren, MI 586-264-8100

    Vac-Met, Incorporated offers hydrogen atmosphere processing using state-of-the-art equipment up to 84" in diameter by 120" deep. Vac Met, Inc. is a high-tech processing company specializing in heat treating utilizing the modern machinery capable of proving your business the superior solutions you need to stay ahead of the curve. Please call Vac-Met today for quality and affordable services.

  • Newington, CT 860-523-9090

    We are a commercial facility which processes metal parts to improve their hardness, strength, ductility or formability. We serve commercial, military and aerospace markets. We are an approved source for numerous companies and are approved by NADCAP for heat treating. We are ISO 9001:2000 Registered and AS 9100 Registered. We also process steel parts to provide a deep black oxide surface finish.

  • Fraser, MI 586-293-5355

    Heat treating services for aerospace, auto, truck, tool and die applications. At our facility we have the distinction of being the only US heat treat facility to carburize Class “A” flight-critical and flight-safety mechanisms for Bell Helicopter. Our certifications: ISO 9002, NADCAP, Q1, QS9000.

  • Pittsburgh, PA 412-781-8053

    Offering industrial and commercial heat treating for over 60 years, Pittsburgh Metal Processing specializes in heat treating, both ferrous and nonferrous alloys. We offer annealing, tempering, stress relieving, normalizing, hardening and quenching. Expect short lead times and a quick turnaround!

  • St. Louis, MO 314-647-7500

    Our commercial metal heat treating services include brazing, vacuum tempering, vacuum heat treating, induction heat treating, batch heat treating and more. At PAULO, we are able to do metallurgical testing and offer analysis services, which is why we are a leader in the metal heat treating industry.

  • Fort Wayne, IN 260-426-8700

    We at Ward Corp pride ourselves as being a large enough business to support the tooling, casting, heat treating, and machining requirements of our customers, yet small enough to be responsive and pro-active to assure ongoing customer satisfaction. Located in Fort Wayne, Indiana, this family owned business has successfully grown from 3 employees to over 200 employees throughout its four divisions.

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businessIndustry Information

Nitriding

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.