Rod nickel alloy X-750™

sheetplatefor the aerospace industry

ATI X-750™ alloy (UNS N07750) is a precipitation hardenable nickel-base superalloy which is used in applications requiring high strength to approximately 1300°F (704°C) and oxidation resistance to approximately 1800°F (982°C). Following heat treatment, ATI X-750™ alloy possesses high stress-rupture strength and a low creep rate at temperatures up to approximately 1500°F (816°C). ATI X-750™ alloy is also highly resistant to corrosion. This alloy has been used primarily in the aerospace industry for items such as gas turbine rotor blades, gas turbine wheels, bolts, and other gas turbine structural parts. It has also found use in jet engine afterburners and airframe and missile structures. Non-aerospace applications include heat treat fixtures, forming tools, and extrusion dies. SPECIFICATIONS & CERTIFICATES The AMS 5542 and AMS 5598 specifications, among others, cover ATI X-750™ alloy strip, sheet and plate. The ASTM B637, AMS 5667, AMS 5668, AMS 5670, AMS 5671, and ASME SB637 specifications cover rod and bar PRODUCT FORMS ATI X-750™ alloy is available as strip, sheet, plate and long product forms. PHYSICAL PROPERTIES Density 0.299 lb/in 3 (8249 kg/m3) HEAT TREATMENT ATI X-750™ alloy is typically supplied in the annealed condition. For strength, it depends on a precipitation hardening reaction involving nickel, titanium, columbium, and aluminum. A variety of precipitation heat treatments are available for ATI X-750™. A common method of achieving high strength at room and elevated temperatures is by a precipitation heat treatment at 1350°F (732°C) for 8 hours followed by furnace cooling to 1150°F (621°C) and holding an additional 8 hours before air cooling.