What is Inconel 750 used for?
INCONEL Alloy X-750 (UNS N07750/W. Nr. 2.4669) is a precipitation-hardened nickel-chromium alloy that resists corrosion and oxidation and maintains high strength to 1300°F. Although the effects of precipitation hardening diminish greatly as temperatures exceed 1300°F, heat-treated material retains useful strength to 1800°F. Alloy X-750 also exhibits excellent properties at cryogenic temperatures.
The economics of INCONEL Alloy X-750, coupled with its availability in all standard mill forms, have led to its widespread use in a variety of industrial applications. In gas turbines, it is used for rotor blades and wheels, bolts, and other structural parts. INCONEL Alloy X-750 is widely used in rocket engine thrust chambers. Airframe applications include thrust reversers and hot air duct systems. Large pressure vessels are made from INCONEL Alloy X-750. Other applications include heat-treating fixtures, forming tools, extrusion dies, and test machine fixtures. For springs and fasteners, INCONEL alloy X-750 is used in temperatures from sub-zero to 1200°F.
Depending on the application and the properties required, various heat treatments are employed. For service above 1100°F, especially where loads are required for extended periods, optimum properties are achieved by solution treatment (2100°F) plus stabilization (1550°F) plus precipitation treatment (1300°F).
For service below 1100°F, the alloy can be strengthened by precipitation treatment after hot or cold working or precipitation treatment after equalization or solution treatment. Furnace cooling is also employed to develop optimum properties for certain applications.
