Special Metals INCONEL® Alloy X-750
Subcategory: Metal; Nickel Base; Superalloy
Key Words: MIL-N-7786, MIL-N-8550, MIL-S-23192, MIL-N-24114; NACE MR-01-75; AFNOR NC 15 FeT, SAE AMS 5542, 5582, 5583, 5598, 5667 - 5671, 5698, 5699, 5747, 7246, UNS N07750; BS HR505; ASTM B 637; ASME SB-637, Boiler Code Section III; Werkstoff Nr. 2.4669
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Material Notes:
Nickel content above includes cobalt; Nb content above includes Ta. A nickel-chromium alloy similar to INCONEL alloy 600 but made precipitation hardenable by additions of aluminum and titanium. The alloy has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at temperatures to about 1300°F (700°C). Its excellent relaxation resistance is useful for high-temperature springs and bolts. Used in gas turbines, rocket engines, nuclear reactors, pressure vessels, tooling, and aircraft structures. Standard product forms are round, flats, extruded section, forging stock, plate, sheet, strip, pipe, tube, and wire.
Nickel content above includes cobalt; Nb content above includes Ta. A nickel-chromium alloy similar to INCONEL alloy 600 but made precipitation hardenable by additions of aluminum and titanium. The alloy has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at temperatures to about 1300°F (700°C). Its excellent relaxation resistance is useful for high-temperature springs and bolts. Used in gas turbines, rocket engines, nuclear reactors, pressure vessels, tooling, and aircraft structures. Standard product forms are round, flats, extruded section, forging stock, plate, sheet, strip, pipe, tube, and wire.
Data provided by the manufacturer, Special Metals.
| Physical Properties | Metric | English | Comments | |
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| Density | 8.28 g/cc | 0.299 lb/in³ | ||
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Mechanical Properties |
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| Tensile Strength, Ultimate | 1250 MPa | 181000 psi | Precipitation Hardened. Value at room temperature. Value at 550°C is 1120 MPa. | |
| Tensile Strength, Yield | 850 MPa | 123000 psi | Precipitation Hardened. Value at room temperature; 0.2% offset. Value at 550°C is 760 MPa. | |
| Elongation at Break | 30 % | 30 % | Precipitation Hardened. Value at room temperature. Value at 550°C is 22%. | |
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Electrical Properties |
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| Electrical Resistivity | 0.000122 ohm-cm | 0.000122 ohm-cm | ||
| Magnetic Permeability | 1.0035 | 1.0035 | at 200 oersted (15.9 kA/m) | |
| Curie Temperature | -125 °C | -193 °F | ||
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Thermal Properties |
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| CTE, linear 20°C | 12.6 µm/m-°C | 7 µin/in-°F | 20-100°C | |
| Heat Capacity | 0.431 J/g-°C | 0.103 BTU/lb-°F | ||
| Thermal Conductivity | 12 W/m-K | 83.3 BTU-in/hr-ft²-°F | ||
| Melting Point | 1390 - 1430 °C | 2530 - 2610 °F | ||
| Solidus | 1390 °C | 2530 °F | ||
| Liquidus | 1430 °C | 2610 °F | ||