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Nitrex Metal Technologies is a privately held company that specializes in precision gas nitriding and ferritic nitrocarburizing in both batch and continuous forms.

Carolina Commercial Heat Treating provides metallurigical heat treating services for customers in a wide variety of industries.

Curtiss-Wright Corporation is a global leader in designing, manufacturing, and overhauling precision components and engineered products primarily for the aerospace, defense, industrial, and power generation markets. Established in 1929 and headquartered in Davidson, North Carolina, the company operates through three main segments: Commercial/Industrial, Defense, and Power. The Commercial/Industrial segment provides products such as electronic throttle controls, sensors, and surface technology services. The Defense segment supplies advanced computing modules, flight test instrumentation, and integrated subsystems, along with avionics and aircraft data management solutions. The Power segment focuses on equipment for nuclear power plants, including pumps, valves, and specialized containment systems, as well as naval propulsion and auxiliary equipment for the U.S. Navy. With over 200 facilities worldwide, Curtiss-Wright is known for its commitment to delivering reliable and sophisticated solutions across its diverse markets.

Nitruvid S.A is a privately held company that provides renowned plasma assisted nitriding processes for stainless steel applications.

Ningbo Jiangdong Ruidahong Heat Treatment is a privately held company that provides protective atmosphere heat treatment services and testing support.