High-Temperature Strength
Designed for applications where strength retention at elevated temperatures is a key material-selection factor.
INCONEL® · Product Details
INCONEL® Alloy 617
Nickel–Chromium–Cobalt–Molybdenum Alloy · High-Temperature Service
INCONEL® alloy 617 is a solid-solution-strengthened nickel-chromium-cobalt-molybdenum alloy combining high-temperature strength with oxidation resistance. Its high nickel and chromium contents support resistance in a range of reducing and oxidizing environments, while cobalt and molybdenum contribute solid-solution strengthening.
Ni–Cr–Co–MoAlloy system
8.36 g/cm³Reference density
1332–1380 °CReference melting range
Key Performance Characteristics
UNS N06617 / W. Nr. 2.4663
Oxidation Resistance
Chromium and aluminum contribute to oxidation resistance during high-temperature exposure.
Corrosion Performance
The alloy resists a range of corrosive environments; suitability depends on the process chemistry and operating conditions.
Fabrication & Welding
The alloy can be formed and welded using conventional techniques, with procedures selected for the required product and application.
Typical Application Areas
Gas Turbine Components
Selected combustion cans, ducting and transition liners in aircraft and land-based gas turbines.
Industrial Heating
Heat-treating baskets and selected high-temperature furnace components.
Chemical Processing
Selected catalyst-grid supports and equipment exposed to demanding process environments.
Power Generation
Selected components for fossil-fuel and nuclear power-generation systems.
Chemical Composition
Limiting chemical composition, %
| Element | Composition limit |
|---|---|
| Nickel | 44.5 min. |
| Chromium | 20.0–24.0 |
| Cobalt | 10.0–15.0 |
| Molybdenum | 8.0–10.0 |
| Aluminum | 0.8–1.5 |
| Carbon | 0.05–0.15 |
| Iron | 3.0 max. |
| Manganese | 1.0 max. |
| Silicon | 1.0 max. |
| Sulfur | 0.015 max. |
| Titanium | 0.6 max. |
| Copper | 0.5 max. |
| Boron | 0.006 max. |
Physical Properties
Published reference values
| Property | Reference value |
|---|---|
| Density | 8.36 g/cm³ |
| Melting range | 1332–1380 °C |
| Specific heat at approx. 26 °C | 419 J/(kg·°C) |
Mechanical Properties
Reference data by form and condition
| Product form / process | Tensile strength | 0.2% yield strength | Elongation | Hardness |
|---|---|---|---|---|
| Plate — hot rolled, solution annealed | 734 MPa | 322 MPa | 62% | 172 BHN |
| Bar — hot rolled, solution annealed | 769 MPa | 318 MPa | 56% | 181 BHN |
| Tubing — cold drawn, solution annealed | 758 MPa | 383 MPa | 56% | 193 BHN |
| Sheet / strip — cold rolled, solution annealed | 755 MPa | 351 MPa | 58% | 173 BHN |
Typical room-temperature reference data for the product forms and processing routes shown, not universal minimums for every product specification.
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Technical reference: Special Metals — INCONEL® alloy 617 technical bulletin