Hangbo Alloy Group
Shanghai · Est. 2012
N06617 technical guide: nominal chemical composition, mechanical and physical properties, corrosion resistance, welding, product forms and ASTM standards...
Inconel 617 (UNS N06617) is a nickel-chromium-cobalt-molybdenum alloy. Solid-solution superalloy with Co + Mo + Al/Ti. Outstanding creep and stress-rupture to 1100 °C. This guide covers its nominal chemical composition, typical mechanical and physical properties, corrosion behaviour, welding, common applications, available product forms and the ASTM standards that apply — everything a specifier needs to evaluate Inconel 617 for a project.
Inconel 617 belongs to the nickel-chromium-cobalt-molybdenum alloy class of materials. It is solid-solution superalloy with co + mo + al/ti. It is outstanding creep and stress-rupture to 1100 °c. It is excellent oxidation and hot-corrosion resistance.
Nominal (wt%) composition of Inconel 617 (UNS N06617):
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | ≥ 44.5 |
| Chromium (Cr) | 20.0 – 24.0 |
| Cobalt (Co) | 10.0 – 15.0 |
| Molybdenum (Mo) | 8.0 – 10.0 |
| Aluminium (Al) | 0.8 – 1.5 |
| Titanium (Ti) | ≤ 0.6 |
| Iron (Fe) | ≤ 3.0 |
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Sulphur (S) | ≤ 0.015 |
| Copper (Cu) | ≤ 0.5 |
Typical physical properties:
| Property | Value |
|---|---|
| Density | 8.36 g/cm³ |
| Melting Range | 1330 – 1380 °C |
| Thermal Expansion (20–1000 °C) | 13.2 µm/m·K |
| Thermal Conductivity (100 °C) | 12.0 W/m·K |
| Electrical Resistivity | 1.22 µΩ·m |
| Modulus of Elasticity | 211 GPa |
| Specific Heat | 430 J/kg·K |
Typical room-temperature mechanical properties (annealed / specified condition unless noted):
| Property | Typical Value |
|---|---|
| Tensile Strength (Rm) | 700 MPa (102 ksi) |
| Yield Strength, 0.2% (Rp0.2) | 300 MPa (44 ksi) |
| Elongation in 50 mm | 45% |
| Hardness (Rockwell B) | 80 – 95 HRB |
| Property | Value |
|---|---|
| Tensile at 650 °C | ≈ 500 MPa |
| Creep rupture at 650 °C / 10 000 h | ≈ 230 MPa |
| Service temperature | Up to 1100 °C |
617 combines a high chromium level with cobalt and molybdenum for outstanding resistance to oxidation, carburisation and hot corrosion up to 1100 °C. The solid-solution-strengthened matrix, plus aluminium/titanium, gives excellent creep and stress-rupture capability in aggressive high-temperature gases.
Welded with matching ERNiCrCoMo-1 filler by GTAW/GMAW/SMAW. Preheat is not required; interpass temperature is kept moderate. Stress-relief is optional and depends on the fabrication code.
The grade is supplied to the following common specifications:
| Standard | Product Form / Scope |
|---|---|
| ASTM B166 | Bar, Rod & Wire |
| ASTM B167 | Seamless Pipe & Tube |
| ASTM B168 | Plate, Sheet & Strip |
| ASTM B564 | Forgings |
| AMS 5887 | Bar for high-temperature service |
Standards & References. Specifications cited on this page; confirm current revisions with the issuing body.
General references: Nickel Institute · AMPP (corrosion) · SAE International · ASTM International
617 is a high-temperature superalloy for gas-turbine combustor liners, advanced coal-plant super-heater tubing and concentrated-solar receivers. Its cobalt, molybdenum and aluminium/titanium content give excellent creep, oxidation and hot-corrosion resistance to about 1100 °C.
At room temperature annealed strength is about 700 MPa tensile / 300 MPa yield with 45 % elongation. At 650 °C it still delivers roughly 500 MPa tensile, and creep-rupture strength at 650 °C / 10 000 h is about 230 MPa.
Yes, using matching ERNiCrCoMo-1 filler by GTAW, GMAW or SMAW. No preheat is needed and post-weld stress relief is code-dependent, not mandatory.
617 is the stronger, higher-temperature grade (Co + Mo + Al/Ti) for creep-loaded turbine and boiler parts to 1100 °C. 601 is a simpler, lower-cost Ni-Cr-Al grade for furnace hardware up to about 1200 °C where creep loading is low.
Yes. The high chromium and cobalt levels make it one of the better solid-solution alloys for Type II hot corrosion and oxidation in combustion gases, which is why it is used in turbine hot sections.
ASTM B166/B167/B168/B564 cover the usual product forms, with aerospace-grade bar covered by AMS 5887.
As a dedicated nickel alloy manufacturer serving power generation, aerospace, chemical processing sectors, Hangbo Alloy Group supplies the grades discussed here across all standard product forms with full ASTM/ASME documentation and EN 10204 3.1 certification. Our material is specified for applications where corrosion resistance, high-temperature strength, and traceable quality are non-negotiable. See our production & testing facilities for more on how every heat is verified.