INCONEL® alloy X-750 (UNS N07750/W. Nr. 2.4669) is a precipitation-hardenable nickel-chromium alloy used for its corrosion and oxidation resistance and high strength at temperatures to 1300°F. Although much of the effect of precipitation hardening is lost with increasing temperature over 1300°F, heat-treated material has useful strength up to 1800°F. Alloy X-750 also has excellent properties down to cryogenic termperatures. Composition is shown in Table 1. The economics of INCONEL alloy X-750 coupled with its availability in all standard mill forms has
resulted in applications in a wide variety of industrial fields. In gas turbines, it is used for rotor blades and wheels, bolts, and other structural members. INCONEL alloy X-750 is used extensively in rocket-engine thrust chambers. Airframe applications include thrust reversers and hot-air ducting systems. Large pressure vessels are formed from INCONEL alloy X-750. Other
applications are heat-treating fixtures, forming tools, extrusion dies, and test machine grips. For springs and fasteners, INCONEL alloy X-750 is used from sub-zero to 1200°F. Depending on the application and the properties desired, various heat treatments are employed. For service above 1100°F, particularly where loads are to be sustained for long times, optimum properties are
achieved by solution treating (2100°F) plus stabilization treating (1550°F) plus precipitation treating (1300°F). For service below 1100°F, the alloy may be strengthened by precipitation treating after hot or cold working or by precipitation treating after equalizing or solution treating. A furnace-cooling treatment is also used to develop optimum properties for some applications.
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Additional information
| tempers | |
|---|---|
| conditions | |
| specifications | |
| dimension-1 | .1875", 1-1/2”, 1-1/4”, 1-1/8”, 1-11/16, 1-13/16”, 1-15/16”, 1-3/16”, 1-3/4”, 1-3/8”, 1-5/16”, 1-5/32”, 1-5/8”, 1-7/16”, 1-7/8”, 1-9/16”, 1”, 1/2", 1/4", 1/8”, 11/16", 13/16", 15/16”, 2-1/2”, 2-1/4”, 2-1/8”, 2-11/16”, 2-13/16”, 2-15/16”, 2-3/16”, 2-3/4”, 2-3/8”, 2-5/16”, 2-5/8”, 2-7/16”, 2-7/8”, 2-9/16”, 2", 3”, 3/16", 3/4", 3/8", 5/16", 5/8", 7/16", 7/8", 9/16", Other (Please Specify) |
| dimension-2 | |
| dimension-3 | .010"wt, .012"wt, .016"wt, .020"wt, .025"wt, .028"wt, .035"wt, .049"wt, .058"wt, .065"wt, .075"wt, .083"wt, .090"wt, .095"wt, .120"wt, .125"wt, .140"wt, .156"wt, .188"wt, .250"wt, .313"wt, .375"wt, .500"wt, .625"wt, .750"wt, .875"wt, Other (Please Specify) |