Metals & alloys · Nickel & cobalt alloys
Alloy 617 nickel–chromium–cobalt–molybdenum
A solid-solution-strengthened Ni–Cr–Co–Mo alloy designed for oxidation resistance and creep strength in very high-temperature gas and process environments.
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01
Overview
- Material class
- Metals & alloys
- Category
- Nickel & cobalt alloys
- Family
- High-Temperature Nickel Alloy
- Product forms
- Sheet/plate, Bar/rod
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Ni | 44.5 | 52 | ||
| Cr | 20 | 24 | 22 | |
| Co | 10 | 15 | 12.5 | |
| Mo | 8 | 10 | 9 | |
| Al | 0.8 | 1.5 | 1.2 | |
| Fe | 3 | 1.5 |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 8.36 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 211 | GPa | Representative; verify product form and condition |
| Tensile strength | ~650–900 | MPa | temperature dependent |
| Creep strength | high | 700–950°C | |
| Oxidation resistance | high | to ~1100°C | |
| Fabricability | good | qualified practice |
Conditions
Representative supplied condition
Condition not fully specified in the source record.
03
Processing and use
Processing
- Product form, thermal history and manufacturing route materially affect performance.
Applications
- Advanced reactor heat exchangers
- Gas turbines
- Petrochemical heaters
Selection considerations
- Use the current governing standard and supplier certification for design or procurement.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| UNS | N06617 | |
| ASME | SB-168 / SB-166 | |
| Code Case | N-898 | advanced reactor applications |
05
Sources and context
Sources
- Special Metals alloy 617 technical dataExisting reference
- ASME Code Case N-898Existing reference
- NASA materials selection resourcesApplication reference
- U.S. Department of Energy critical materials programStrategic reference
- U.S. Nuclear Regulatory Commission materials resourcesApplication reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Availability and lead time depend on grade, product form, certification and regional supply chain.
Segregated recovery and closed-loop recycling improve material efficiency where practical.