INCONEL X750 is a nickel-chromium alloy similar to INCONEL 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 temperatures to 1300°F (700°C). Its excellent relaxation resistance is useful for high-temperature springs and bolts.
Applications of Inconel X750:
In gas turbines, it is used for rotor blades and wheels, bolts, and other structural members.
It is used extensively in rocket-engine thrust chambers.
Airframe applications include thrust reversers and hot-air ducting systems.
Large pressure vessels are formed from Alloy X-750.
Other applications are heat-treating fixtures, forming tools, extrusion dies, and test machine grips.
Normal product forms: sheets, plates, bars, forgings, tubes, strip, and wires.
Specifications/Standard: AMS 5542, AMS 5598, AMS 5670, AMS 5671, AMS 5747, and ASTM B637.
Nickel (plus Cobalt): 70.00 min.
Chromium (Cr): 14.0-17.0
Iron (Fe): 5.0-9.0
Titanium (Ti): 2.25-2.75
Aluminum (Al): 0.40-1.00
Niobium (plus Tantalum): 0.70-1.20
Manganese (Mn): 1.00 max.
Silicon (Si): 0.50 max.
Sulfur (S): 0.01 max.
Copper (Cu): 0.50 max.
Physical Constants and Thermal Properties
Density: Approximately 8.28 g/cm³
Melting Point: Approximately 1393-1427°C
Thermal Conductivity: Approximately 9.8 W/(m·K) at 100°C
Coefficient of Thermal Expansion: Approximately 12.9 μm/m·K from 20°C to 100°C
Specific Heat Capacity: Approximately 0.458 J/(g·K) at 20°C
