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Case Hardening Companies

IQS Directory is a top industrial directory listing of leading industrial case hardening companies. Access our comprehensive index to review and source case hardening companies with preview ads and detailed product descriptions. These case hardening companies can design,engineer and provide case hardening services to your specifications and application need. A quick and easy to use request for quote form is provided for you to contact these case hardening companies. Each company has detailed profile information, locations, phone number, website links, product videos and product information defined. Read customer reviews and product specific news articles. We are the right resource for your information requirement whether its for a provider of hi speed-it case hardening, case hardening of steel, nitride hardening.

  • Warsaw, IN 574-269-7116

    Applied Thermal Technologies specializes in bright vacuum heat treating services. We can do stainless steel heat treating and brazing services often demanded by medical industries. Our metal processing includes tempering, hardening, sintering and titanium heat treating.

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  • Racine, WI 262-637-9301

    We are a contract manufacturer of heavy-gauge metal components. We perform multiple secondary operations including various forms of heat treating . Our experienced engineering staff has the expertise to solve the most challenging design requirements. Please contact us for a quote for your needs.

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  • Westland, MI 734-729-1665

    Westside Flame Hardening provides many heat treating services for ferrous and aluminum alloys. Utilizing the latest in processing, and monitoring technology, we are capable of meeting or exceeding our customer’s requirements in both a timely and cost effective manner. Our in-house metallurgical laboratory, enables us to test and develop processing techniques and ensure the highest level of quality.

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  • Wickliffe, OH 877-484-2867

    Our multifaceted company knows metals. Heat treating of aluminum, die castings and high-speed steel via induction heating and vacuum heat treating are among our major functions. Other services we perform include annealing of brass, copper and magnetic alloys via vacuum, solution, induction, bright and atmosphere.

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Case Hardening Industry Information

Case Hardening

Case hardening is a heat treatment that combines the ductility of low carbon materials with the strength of high carbon through the creation of a tough outer coating which surrounds a softer more malleable core. Unlike other coating and plating techniques, case hardening actually penetrates the surface of the base material providing a gradual transition from high carbon content to low.

Quick links to Case Hardening Information

Applications of Case Hardening

Also known as surface hardening, case hardening can be applied in various applications. Industries such as construction, fencing, machining, grating, and metalworking commonly utilize case hardened steel and iron components, as they provide reliable parts and improve product longevity under extreme stresses.

Screws, grates, bolts, engine camshafts, firing pins, theft prevention systems, chains, metal panels, and doors undergo this particular type of heat treating to resist cutting or shearing while remaining less brittle than untreated high carbon materials. Most often these parts are shaped before hardening, as it reduces machining opportunities due to the heightened strength and rigidity.

Case Hardening Process

Although the results of nitriding and boriding heat treatments may differ slightly from that of carburizing, the processes are quite similar. The steel or iron worked piece is placed inside what is known as a carburizing pack. Essentially, this is an encasement tightly filled with carbon-based compounds.

The part and its pack are then put inside a hot furnace and heated to high temperatures, usually between 482 and 955 °C ( 900-1,750 °F) depending upon materials, thickness, desired hardness, and corrosion resistance. The duration and temperature of this heating determines the depth to which the hardening extends beyond the surface of the substrate. Typical depths are around 1.5 mm, at which point carbon content tapers down.

While this is the traditional and most common technique used for case hardening, it is not the only one. Alternative methods abound and are growing in popularity. One such technique is to heat the parts in a carbon-rich atmosphere, such as a methane-rich furnace. The carbon from the air will create a thin protective layer. Additionally, steel and iron components can be heated repeatedly with a torch and then quenched in a carbon-rich medium. This is most effective for smaller parts, as it is often capable of less penetration than furnace based methods. As homogeneous steels with low or high carbon content are now more readily available, case hardening is used less frequently, though these uniform metals cannot match the combination of extreme hardness and toughness provided by case hardened parts and materials.

Notable Types of Case Hardening

While carburization, or the diffusion of carbon into a metal, is the most commonly used type of case hardening, nitriding, and boriding are also used and involve nitrogen and boron diffusion. With each technique, high temperatures diffuse the material, after which the surface layer is treated to attain the desired hardness.