UNS N06617 (Inconel 617 / W.Nr. 2.4663 / GH617)
1. Cross Reference Standards
| Standard System |
Grade |
| UNS (ASTM) |
N06617 (Commercial Name: Inconel 617) |
| Chinese High-Temp Alloy |
GH617 (Corrosion Resistant Alloy NS334) |
| DIN Werkstoffnummer |
2.4663 |
| ISO Designation |
NiCr22Co12Mo9 |
Applicable Specifications
- Plate & Sheet: ASTM B168, AMS 5889
- Bar & Forging: ASTM B166, AMS 5887
- Seamless Tube & Pipe: ASTM B167
- Forged Fittings: ASTM B564
- Chinese National Standards: GB/T 14992, GB/T 15007
2. Chemical Composition (wt%, ASTM Specification Range)
| Element |
Content Range |
Function |
| Ni |
Balance (≥44.5) |
Matrix base for corrosion resistance |
| Cr |
20.0～24.0 |
Anti-oxidation, anti-sulfidation, passive film formation |
| Co |
10.0～15.0 |
Solid-solution strengthening, improves high-temperature creep rupture strength |
| Mo |
8.0～10.0 |
Enhances creep resistance, pitting & chloride corrosion resistance |
| Al |
0.8～1.5 |
Forms dense Al₂O₃ protective oxide layer at extreme temperatures |
| Ti |
0.6～1.5 |
Precipitation strengthening via γ' phase |
| Fe |
≤3.0 |
Impurity limit |
| C |
0.05～0.15 |
Stabilizes grain boundary carbides |
| Mn, Si |
≤1.0 |
Deoxidation, improves formability |
| B |
≤0.006 |
Grain boundary strengthening |
| S |
≤0.015 |
Strict limit to prevent hot brittleness |
3. Physical Properties (Solution Annealed Condition)
- Density: 8.36 g/cm³
- Melting Range: 1330～1380 °C
- Long-term service temperature: ≤1100 °C; Short-term peak temperature: 1200 °C
- Superior thermal conductivity & thermal expansion coefficient compared with tungsten-based superalloys, high specific strength
4. Room-Temperature Mechanical Properties (Solution Treated Standard Values)
- Tensile Strength (Rm): ≥710 MPa
- Yield Strength (Rp0.2): ≥340 MPa
- Elongation (A): ≥30%
- Hardness: HB ≤240
Outstanding high-temperature performance: Retains excellent creep rupture strength at 980 °C; approved by ASME boiler & pressure vessel codes for long-term pressurized service at 980 °C.
5. Key Material Characteristics
-
Excellent High-Temperature Oxidation & Carburization Resistance
Combined Cr-Al oxide coating delivers ultra-low oxidation rate in air at 1000 °C; far superior to Inconel 600 / 601 against carburization and high-temperature sulfidation (H₂S / SO₂ flue gas).
-
Superior High-Temperature Creep & Thermal Fatigue Resistance
Dual solid-solution strengthening by Co & Mo plus γ' precipitation hardening; resists deformation and cracking under cyclic thermal shock and long-term high-temperature loading.
-
Balanced Wet & Dry Corrosion Performance
- Stable in high-temperature flue gas, carburizing & sulfiding environments;
- Resistant to nitric acid, phosphoric acid, chloride media at ambient & moderate temperatures; high resistance to stress corrosion cracking (SCC).
- Good Formability & Weldability
Suitable for hot/cold rolling, forging and stamping. Matching filler metal: ERNiCrCoMo-1 (2.4675). Excellent TIG/MIG welding performance; no post-weld heat treatment required to retain high-temperature mechanical properties.
6. Typical Applications
Aerospace Gas Turbines
Combustor liners, transition ducts, turbine seals, high-temperature flow guides, exhaust components
Thermal & Gas Power Generation
Heavy-duty gas turbine burners, supercritical boiler high-temperature tubes, waste heat boiler linings
Nuclear Energy (High-Temperature Helium-Cooled Reactors)
Reactor heat exchangers, high-temperature loop piping, core support structures
Petrochemical Industry
Ethylene cracking tubes, ammonia reformers, nitric acid catalytic furnace supports, high-temperature reduction furnace baskets
Heat Treatment & Industrial Furnace Equipment
High-temperature muffle retorts, furnace rollers, heating element supports, vacuum heat treatment tooling
New Energy
Concentrated solar power (CSP) absorber panels, high-temperature electrolytic hydrogen production equipment
7. Heat Treatment (Standard Delivery Condition)
Standard supply state: Solution annealing at 1175°C ±10°C, followed by rapid air cooling or water quenching.
Purpose: Dissolve carbides and precipitates to obtain single-phase austenite, balancing ductility and high-temperature strength.
Low-temperature aging is prohibited, as brittle phases will precipitate and drastically reduce high-temperature ductility.
8. Comparison with Similar Alloys
- UNS N06600 (Inconel 600): No Co/Mo; poor high-temperature creep performance, limited service below 800°C
- UNS N06601: Low Mo, no Co; good oxidation resistance but insufficient high-temperature strength
- Haynes 230 (UNS N06230): No Co/Al; inferior oxidation and creep properties vs N06617
- UNS N06617: Balanced high-temperature strength, oxidation resistance and sulfidation resistance; preferred nickel alloy for service above 1000°C
Products:
Alloy steel barrel type forging QT,quenching barrel forging,normalizing barrel forging,tempering barrel forging,sleeve forging QT,oil cylinder QT
Carbon steel barrel forging,alloy steel barrel type forging,stainless steel barrel forging,oil cylinder forging,after QT would enhance mechanical property,improve strength prolong working life.
Products reference:
| Material |
Carbon steel, alloy steel, stainless steel or other kind of material
|
| Foring equipment |
9000MM numerical control ring rolling machine |
| Application |
QT bareel foring used for all forging heat treatment,enhance mechanical property
|
| Melting process |
EF+LF+VD |
| Production process |
Forging+heat treatment+rough machining+QT
|
| Forging ratio |
≥3.5
|
| Applicable standard |
ASTM,ASME,DIN,JIS,ISO,BS,API,EN |
| Executive standard |
JB/GB/EN/DIN/JIS/ASME/ASTM/ISO |
| Authority certification |
ISO,BV,SGS, IST, UL,CTI |
| Inspection |
Plant self inspection or third party inspection,shipment after all inpection items qualified
|
| Delivery term |
Rough machining(N+T);finish machining(Q+T)
|
|
Test equipment
|
Spectrograph,ut device,tensile and compact test machine,metalloscope,outside micrometer,bore dial indicator,hardness test machine |
| Service |
Our service included the forging, process, heat treatment, finish machining, package, local logistics, customers clearance and maritime transport. We took the customer’s requirements as the principal thing, and pay attention on the products quality. |
Process procedure:
Forging process flow quality control:
- Raw material steel ingot into warehouse(test the chemical content)
- Cutting→ Heating(Furnace temperture test)
- Heat treatment after forging(Furnace temperture test) Discharge the furnace(blank inspection)
- Machining→ Inspection(UT,MT,Visal diamention, hardness)
- QT→ Inspection(UT, mechanical properties, hardness, grain size)
- Finish machining→ Inspection (dimension)
- Packing and Marking(steel stamp, mark)→ Storage Shipment
Advantage
- High-precision dimensional tolerance;
- Excellent mechanical properties;
- Produce different dimension based on customer’s requirements;
- Advanced manufacture equipments and inspection devices;
- Excellent technical personality;
- Control the production procedure strictly;
- Pay attention on the package protection;
- Quality full service.
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