Alloy A286 INCOLOY® A286 – W. Nr. 1.4980 / UNS S66286 / ASTM A638, B564, B366
Alloy A286 INCOLOY® A286
Alloy A286 INCOLOY® A286 is an iron-nickel-chromium-based alloy with additions of molybdenum, titanium, and vanadium, designed to be precipitation hardenable. This alloy offers high mechanical properties and oxidation resistance up to 700°C (1300°F).
Thanks to its excellent tensile strength, fatigue resistance, and resistance to deformation under load (creep), Alloy A 286 is ideal for critical applications such as:
- Aircraft turbine components.
- Components for power generation plants.
- Fasteners for the automotive and Oil & Gas sectors.
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Reference standards:
- ASTM A638 (bars and forgings)
- ASTM B564 (flanges and forgings)
- ASTM B366 (fittings)
Chemical composition (%)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 24.0 – 27.0 |
| Iron (Fe) | Balanced |
| Chromium (Cr) | 13.5 – 16.0 |
| Titanium (Ti) | 1.90 – 2.35 |
| Molybdenum (Mo) | 1.0 – 1.5 |
| Vanadium (V) | 0.10 – 0.50 |
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Aluminum (Al) | 0.35 max |
| Sulfur (S) | 0.030 max |
| Boron (B) | 0.001 – 0.01 |
Mechanical properties (aged/hardened)
| Temperature (°C) | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 1240 | 965 | 25 |
| 600 | 1090 | 885 | 22 |
| 700 | 1000 | 800 | 18 |
| 800 | 930 | 780 | 12 |
Physical properties
- Density: 7.94 g/cm³
- Melting Range: 1370 – 1430°C
- Young’s Modulus: 201 GPa
- Magnetic permeability: 1.007 at 200 oersted
- Thermal Conductivity: 14.1 W/m°C (at 100°C)
Heat treatments
-
Solution annealing: 1800°F (980°C), rapid air cooling.
-
Aging: 1325°F (720°C) for 16 hours, followed by air cooling.
- Treatment at 1800°F ensures maximum creep resistance.
- Treatment at 1650°F improves ductility and tensile strength at room temperature.
Available forms
INCOLOY® Alloy A 286 is available in the following forms:
Industrial applications
Due to its high tensile strength, fatigue resistance, and oxidation resistance, INCOLOY® A 286 is ideal for:
- Aerospace and Defense: Turbine components, rings, and disks.
- Power Generation: High-temperature resistant structural components.
- Chemical and Pharmaceutical Industry: Transport systems for corrosive and high-temperature environments.
- Motorsport: Fasteners and components exposed to high temperatures.
- Nuclear: Structural and containment components for nuclear reactors.
- Oil & Gas: Valves, flanges, and fittings for extreme environments.
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