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X-750
Product Information
Alloy X-750 is a nickel chromium alloy similar to Alloy 600 but made precipitation hardenable by additions of aluminum and titanium. It has goodresistance to corrosion and oxidation along with high tensile and creep-rupture properties at temperatures to 1300°F. 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.
Common Trade Names
Inconel X-750
Inventory
X-750 Sheet
Specifications
UNS: N07750 W. Nr./EN: 2.4669 ASTM: B 637 NACE: MR0175 ISO: 15156-3
Chemical Composition, %
| Ni | Cr | C | Mn | Cu | Si | S | Fe | |
|---|---|---|---|---|---|---|---|---|
| MIN | 70.00 | 14.00 | -- | -- | -- | -- | -- | 5.00 |
| MAX | -- | 17.00 | 0.08 | 1.00 | 0.50 | 0.50 | 0.01 | 9.00 |
Features
- Good mechanical properties at high temperatures
- Good formability
- Good oxidation resistance
Applications
- Oil and gas production
- Gas turbine engines
- Nuclear engineering
Physical Properties
Density: 0.299 lb/in3
Melting Point: 2540- 2600°F
Poisson's Ratio: 0.30
Electrical Resistivity: 731 Ohm-circ mil/ft
| Temperature, °F | 68 | 392 | 752 | 800 | 1000 | 1112 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | - | 7.1 | 7.7 | 9.2 | 10.1 | 8.3 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F |
6.8 | -- | -- | -- | -- | -- |
| Modulus of Elasticity, Dynamic psi x 106 | 32.1 | 30.5 | 28.6 | 23.9 | 20.3 | 26.2 |
* 70°F to indicated temperature.
Mechanical Properties
Minimum Specified Properties, ASTM A 240
| Ultimate Tensile Strength, ksi | 120 |
| 0.2% Yield Strength, ksi | 60 |
| Elongation, % | 30 |
| Hardness MAX, Brinell | -- |
Typical Tensile & Impact Properties, Bar ¾ equalized and precipitation treated hot-rolled, 1625°F 24 hours, AC + 1300°F for 20 hours, AC
| Temperature,°F | 600 | 800 | 1000 | 1100 | 1200 | 1350 | 1500 |
| Ultimate Tensile Strength, ksi | 169.0 | 166.0 | 163.5 | 159.0 | 143.0 | 107.0 | 65.4 |
| 0.2% Yield Strength, ksi | 116.5 | 114.0 | 115.0 | 112.0 | 110.0 | 98.3 | 64.7 |
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