X
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Alloy X is one of the most widely used nickel base superalloys for gas turbine engine components. This solid solution strengthened grade has good strength and excellent oxidation resistance to 2000°F. Alloy X has excellent resistance to reducing and carburizing atmospheres, making it suitable for furnace components. Due to its high molybdenum content, Alloy X may be subject to catastrophic oxidation at 2200°F.
Alloy X is welded by all common methods such as gas tungsten arc, gas metal arc, shielded metal arc, electron beam and resistance welding. Use matching filler metal, keep interpass temperature low. After severe forming, fabrications may be annealed 2150°F, 15 minutes per 1/8" of thickness, rapid air cool.
Specifications
UNS N06002, Werkstoff 2.4665, EN 2.4665
AMS 5536, AMS 5754, AMS 5798
ASTM B 435, ASTM B572
ASME SB-435, ASME SB-572, ASME SFA-5.14, ASME Section IX P No. 43
GE B50A436, GE B50TF24, GE B50T83, PDS 15102QFC, PDS 1038 (X-low)
Inventory
Alloy X Plate, Alloy X Sheet, Alloy X Coil, Alloy X Bar, Alloy X Welding Products
Common Trade Names
Hastelloy X, Alloy X
Chemical Composition, %
| Cr | Mo | Co | W | Al | Ti | B | C | Fe | Mn | Si | P | S | Cu | Ni | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 20.5 | 8.0 | 0.5 | 0.2 | - | - | - | 0.05 | 17.0 | - | - | - | - | - | - |
| MAX | 23.0 | 10.0 | 2.5 | 1.0 | 0.5 | 0.15 | 0.01 | 0.15 | 20.0 | 1.0 | 1.0 | 0.04 | 0.03 | 0.5 | Balance |
Features
- Good high temperature strength
- Oxidation resistance through 2000°F
- Carburization resistant
Applications
- Combustion liners
- Turbine exhaust components
- Aircraft cabin heaters
- Transition Ducts
Physical Properties
Density: 0.297 lb/inch3
Melting Point: 2300 - 2470°F
| Temperature, °F | 70 | 1000 | 1200 | 1400 | 1600 | 1800 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | - | 8.4 | 8.6 | 8.8 | 9.0 | 9.2 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F |
- | 11.3 | 12.7 | 13.9 | 15.2 | 16.4 |
| Modulus of Elasticity, Dynamic psi x 106 | 30 | 26 | 25 | 23 | 22 | 20 |
* 70°F to indicated temperature.
Mechanical Properties
Representative Tensile Properties
| Temperature, °F | 70 | 1000 | 1200 | 1400 | 1600 |
| Ultimate Tensile Strength, ksi | 111 | 89 | 83 | 67 | 45 |
| 0.2% Yield Strength, ksi | 55 | 36 | 35 | 34 | 28 |
| Elongation, % | 44 | 49 | 54 | 53 | 58 |
Typical Stress-Rupture Strength Plate & Bar, Stress To Rupture At Indicated Time
| Temperature, °F | 1200 | 1500 | 1800 |
| 100 Hours, ksi | 48 | 14 | 4.0 |
| 10,000 Hours, ksi | 34 | 10 | 2 |
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