Inconel 617 · UNS N06617 · W. Nr. 2.4663
Inconel 617 (N06617): composition, properties, fittings and flanges
Inconel 617 (N06617, W. Nr. 2.4663) is Solid-solution strengthened nickel-chromium-cobalt-molybdenum alloy. Inconel 617 is specified at Nickel 44.5 min (balance), Chromium 20.0 - 24.0, Cobalt 10.0 - 15.0. Inconel 617 combines 22 % chromium with cobalt and molybdenum to give the best combination of high-temperature strength and…
- UNS
- N06617
- W. Nr.
- 2.4663
- Density
- 8.36 g/cm³ (0.302 lb/in³)
- Key strength
- 655 MPa / 95 ksi
Identification and standards
| Short form | Inconel 617 · UNS N06617 · W. Nr. 2.4663 |
|---|---|
| Classification | Solid-solution strengthened nickel-chromium-cobalt-molybdenum alloy |
| UNS | N06617 |
| Werkstoff number | 2.4663 |
| Material family | Inconel Alloys |
Chemical composition
| Element | Composition (wt %) | Why it is there |
|---|---|---|
| Nickel (Ni) | 44.5 min (balance) | Matrix |
| Chromium (Cr) | 20.0 - 24.0 | Oxidation and hot corrosion resistance |
| Cobalt (Co) | 10.0 - 15.0 | Solid-solution and creep strength |
| Molybdenum (Mo) | 8.0 - 10.0 | Solid-solution strengthening |
| Aluminium (Al) | 0.80 - 1.50 | Oxidation scale adherence |
| Carbon (C) | 0.05 - 0.15 | Creep strength |
| Iron (Fe) | 3.00 max | Residual |
| Titanium (Ti) | 0.60 max | - |
Note Single figures are maximum limits unless shown as a range. Always confirm against the heat-specific EN 10204 3.1 certificate supplied with your order.
Mechanical properties
| Tensile strength, min (annealed) | 655 MPa / 95 ksi |
|---|---|
| 0.2 % yield strength, min | 275 MPa / 40 ksi |
| Elongation in 2 in, min | 30 % |
| Typical hardness, annealed | 170 - 220 HB |
| ASME Section VIII Division 1 coverage | To about 980 °C |
Warning Values depend on product form, section thickness and heat treatment. Larger sections generally achieve lower strength than thin product; always design against the applicable code allowable stress rather than these figures.
Physical properties
| Density | 8.36 g/cm³ (0.302 lb/in³) |
|---|---|
| Melting range | 1330 - 1375 °C (2425 - 2505 °F) |
| Modulus of elasticity | 211 GPa (30.6 x 10⁶ psi) |
| Thermal conductivity at 20 °C | 13.4 W/m·K |
| Mean coefficient of thermal expansion, 20-100 °C | 12.8 µm/m·°C |
| Specific heat capacity | 419 J/kg·K |
Specifications by product form
| Forgings & flanges | ASTM B564 / ASME SB-564 (UNS N06617) |
|---|---|
| Butt weld fittings | ASTM B366 / ASME SB-366 (WP617) |
| Seamless pipe & tube | ASTM B167 / B546 / ASME SB-167 |
| Plate / sheet / strip | ASTM B168 / ASME SB-168 |
| Bar / rod | ASTM B166 / ASME SB-166 |
| Welding consumables | ERNiCrCoMo-1 |
| UNS / EN / China | UNS N06617 · W. Nr. 2.4663 |
Product forms available
Hangbo supplies this grade in the following forms. Sizes outside the listed range can often be produced to order.
- Forged flanges blanks and finished flanges to ASME B16.5, B16.47 Series A/B and B16.36
- Butt weld elbows, tees, reducers, caps and stub ends to ASME B16.9 and MSS SP-43
- Seamless pipe and tube to the applicable ASTM / ASME pipe specification
- Forged rings, discs and hubs machined to your drawing
Typical applications
- Gas turbine combustion cans, transition liners and ducts
- High-temperature gas-cooled reactor heat exchangers and piping
- Nitric acid and catalyst handling equipment at temperature
- Heat treatment furnace muffles and radiant tubes
Welding, forming and machining
- Welding
- Weld by GTAW or GMAW with ERNiCrCoMo-1 filler. It has good weldability for a high-temperature alloy; no post-weld heat treatment is needed for most service.
- Heat treatment
- Solution anneal at 1150 - 1200 °C and rapid cool. No ageing treatment is used - the alloy is a solid-solution grade.
- Hot and cold forming
- Hot work in the range stated by the mill for this grade, then re-solution or re-age before final machining so that the delivered condition matches the certificate.
- Machining
- Machine with sharp carbide or high-speed steel tooling, positive rake, constant feed and ample coolant. Never dwell - the surface work-hardens quickly.
Buy Inconel 617 from Hangbo
Material is supplied with full heat-number traceability, solution annealing or ageing performed under calibrated furnace control, and an EN 10204 3.1 certificate covering chemical analysis, mechanical properties, heat treatment records and the agreed NDT scope. Positive material identification and third party inspection and test reports from SGS are available for critical service.