Inconel Alloy® X-750 is a nickel-chromium austenitic alloy similar to Alloy 600 but made precipitation-hardenable by additions of aluminum and titanium. It has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at high temperatures to 1300°F (700°C). Extended applications that require high strength at temperatures beyond 1100°F (593°C) may require a solution treatment, with air cooling between intermediate and final aging.
This material has excellent relaxation resistance and is non-magnetic. It has good elevated temperature strength properties to 1300ºF (700°C) and oxidation resistance to 1800ºF (983˚C). Inconel® X-750 is resistant to a wide variety of industrial corrosives under both oxidizing and reducing conditions. This alloy also has excellent resistance to chloride stress corrosion cracking in the fully age hardened condition.
Standard Specifications
UNS N07750
AMS 5598
AMS 5542
ASTM B 637
ASME SB 637
Common Applications of X750
Structural members in hot sections of gas turbines such as discs, thrust reversers, wheels and ducts
Aircraft structures
Rocket engines
Nuclear reactors
Heat treat fixtures
Cryogenic vessels, springs, and fasteners
Wire formulation with heat temper used in springs at elevated temperatures
Exhaust valves of diesel engines
Applications that benefit from an alloy with high creep-rupture strength
Alloy X750 Chemical Composition
Element Percent by Weight
Ni Co
Nickel + Cobalt 70% min
Cr
Chromium 14-17%
Fe
Iron 5-9%
Ti
Titanium 2.25-2.75%
Al
Aluminum 0.4-1.0%
No Ta
Nobelium & Tantalum 0.7-1.2%
Si
Silicon 0.50% max
S
Sulfur 0.01% max
Cu
Copper 0.50% max
C
Carbon 0.08% max
Co
Cobalt 1.00% max
