Alloy 617 INCONEL® 617 – W. Nr. 2.4663 / UNS N06617 / ASTM B166, B168, B564
Alloy 617 INCONEL® 617
Alloy 617 INCONEL® 617 is a nickel-chromium-cobalt-molybdenum alloy known for its exceptional combination of mechanical strength and oxidation resistance at high temperatures. This alloy is ideal for applications up to 980°C, thanks to its high resistance to creep and its ability to form a protective film against oxidation and carburization.
The high percentage of nickel and chromium provides excellent resistance to both reducing and oxidizing environments, while the combination of aluminum and cobalt further enhances surface protection in extreme environments. Molybdenum and cobalt help increase mechanical strength, making the alloy suitable for critical structural applications in aerospace, power generation, and the chemical industry.
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Reference standards:
- ASTM B166 (bars and wires)
- ASTM B168 (sheet and strip)
- ASTM B564 (flanges and forgings)
Chemical composition (%)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 44.5 min |
| Chromium (Cr) | 20.0 – 24.0 |
| Cobalt (Co) | 10.0 – 15.0 |
| Molybdenum (Mo) | 8.0 – 10.0 |
| Aluminum (Al) | 0.8 – 1.5 |
| Iron (Fe) | 3.0 max |
| Carbon (C) | 0.05 – 0.15 |
| Titanium (Ti) | 0.6 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Copper (Cu) | 0.5 max |
| Sulfur (S) | 0.015 max |
| Boron (B) | 0.006 max |
Mechanical properties
| Temperature (°C) | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 734 | 322 | 56 |
| 600 | 650 | 300 | 50 |
| 800 | 520 | 215 | 45 |
| 1000 | 410 | 175 | 35 |
Heat treatments
- Solution annealing: 1175°C to ensure maximum resistance to creep and thermal fatigue.
- Hot forming: Temperatures between 1010 and 1205°C, followed by controlled cooling.
- Cold forming: The alloy is cold workable but has a high work hardening, requiring intermediate annealing treatments at 1040°C.
Available formats
INCONEL® Alloy 617 is available in the following forms:
Industrial applications
Due to its exceptional resistance to high temperatures and corrosion, INCONEL® 617 is widely used in the following industries:
- Aerospace and Defense: Gas turbine components, combustion chambers and exhaust nozzles.
- Power Generation: Heat exchangers, nuclear power plants, and gas turbines.
- Chemical and Pharmaceutical Industry: Components for high-temperature chemical plants and industrial catalysts.
- Motorsport: Critical components for racing engines exposed to high temperatures.
- Nuclear: Materials for nuclear reactors and cooling systems.
- Oil & Gas: Carburization-resistant coatings and hydrocarbon production facilities.
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