Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
Inconel 617 is a solid-solution-strengthened nickel–chromium–cobalt–molybdenum alloy with an exceptional combination of high-temperature strength and oxidation resistance. The high nickel and chromium contents make it resistant to a variety of both reducing and oxidising media; aluminium (with chromium) provides oxidation resistance at high temperature; and cobalt with molybdenum imparts solid-solution strengthening. This datasheet presents the material within the trade-name designation system.
The combination of high strength and oxidation resistance at temperatures over 980 °C (1800 °F) makes the alloy an attractive material for gas-turbine components such as ducting, combustion cans, and transition liners, in both aircraft and land-based engines. It is also used for catalyst-grid supports in nitric acid production, heat-treating baskets, reduction boats in molybdenum refining, and components of fossil-fuelled and nuclear power-generating plant.
The alloy is supplied solution-annealed, which provides a coarse grain structure for the best creep-rupture strength and good room-temperature bend ductility. It is not an age-hardening alloy in normal use; strength derives from solid-solution effects and, after long exposure at 650–760 °C, from carbide and gamma-prime precipitation. It resists high-temperature carburisation and nitriding, and retains ductility after prolonged high-temperature exposure.
Typical values at room temperature, solution-annealed condition.
| Property | Value | Unit |
|---|---|---|
| Density | 8.36 | g/cm³ |
| Melting range | 1332–1380 | °C |
| Elastic modulus (25 °C) | 211 | GPa |
| Shear modulus (25 °C) | 81 | GPa |
| Poisson's ratio | 0.30 | — |
| Specific heat capacity (26 °C) | 419 | J/kg·K |
| Electrical resistivity (20 °C) | 1.22 | µΩ·m |
| Coefficient of thermal expansion (20–100 °C) | 11.6 | µm/m·°C |
| Maximum service temperature | ~1100 | °C |
| Crystal structure | Face-centred cubic (FCC) | — |
Limiting composition per ASTM B166 / B168.
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel | Ni | 44.5 | balance | Austenitic FCC matrix; reducing-media resistance |
| Chromium | Cr | 20.0 | 24.0 | Forms Cr₂O₃ scale; oxidation and corrosion resistance |
| Cobalt | Co | 10.0 | 15.0 | Solid-solution strengthening; high-temperature stability |
| Molybdenum | Mo | 8.0 | 10.0 | Solid-solution strengthening; wet-corrosion resistance |
| Aluminium | Al | 0.8 | 1.5 | Forms protective sub-surface oxide; oxidation resistance |
| Carbon | C | 0.05 | 0.15 | Carbide formation for creep strength |
| Iron | Fe | — | 3.0 | Residual |
| Manganese | Mn | — | 1.0 | Deoxidiser |
| Silicon | Si | — | 1.0 | Deoxidiser |
| Titanium | Ti | — | 0.6 | Microalloying; carbide former |
| Copper | Cu | — | 0.5 | Residual |
| Boron | B | — | 0.006 | Grain-boundary strengthening |
| Sulphur | S | — | 0.015 | Residual impurity |
Typical room-temperature properties of solution-annealed material.
| Product Form | Yield strength Rp0.2 | Tensile strength Rm | Elongation | Hardness |
|---|---|---|---|---|
| Plate (hot-rolled) | 322 MPa | 734 MPa | 62 % | 172 HB |
| Bar (hot-rolled) | 318 MPa | 769 MPa | 56 % | 181 HB |
| Tubing (cold-drawn) | 383 MPa | 758 MPa | 56 % | 193 HB |
| Sheet / strip (cold-rolled) | 351 MPa | 755 MPa | 58 % | 173 HB |
Values are typical for solution-annealed material; confirm against the mill test certificate for each delivery.
Modulus of elasticity decreases with temperature (solution-annealed):
| Temperature | Tensile modulus | Shear modulus |
|---|---|---|
| 25 °C | 211 GPa | 81 GPa |
| 200 °C | 201 GPa | 77 GPa |
| 400 °C | 188 GPa | 72 GPa |
| 600 °C | 173 GPa | 66 GPa |
| 800 °C | 157 GPa | 61 GPa |
| 1000 °C | 139 GPa | 53 GPa |
The alloy displays exceptionally high creep-rupture strength even at 980 °C (1800 °F) and above — the primary reason for its selection in long-term, high-stress, high-temperature service. Creep strength derives from the solid-solution Co/Mo matrix plus carbide precipitation.
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation (air) | Outstanding | Cr + Al form protective oxide; service over 980 °C |
| Cyclic oxidation | Outstanding | Retains protective oxide under severe thermal cycling to 1095 °C |
| Carburisation | Excellent | Lowest weight gain among comparable alloys in gas-carburising tests |
| Nitriding | Good | Good resistance; can form internal Al nitrides in highly oxidising combustion atmospheres |
| Reducing media | Very Good | High Ni + Mo content |
| Aqueous corrosion | Good | Ni-Cr-Mo gives resistance to many wet environments; normally used hot |
| Metallurgical stability | Excellent | Retains ductility after prolonged high-temperature exposure |
Normally used in the solution-annealed condition for best creep-rupture strength and bend ductility. Not an age-hardening alloy in normal service.
Solution Anneal Temperature: 1175 °C (2150 °F), time commensurate with section size Cooling: Water quench or rapid air cool Purpose: Coarse grain structure for maximum creep-rupture strength.
Re-solution Anneal (after cold work / forming) Temperature: 1121 °C (2050 °F), air cool Purpose: Recrystallises cold-worked structure while limiting grain growth; preserves low-cycle-fatigue performance.
Annealing for cold forming: 1040 °C (1900 °F).
Excellent weldability. Filler metal of matching composition is used; deposited weld metal is comparable to the wrought alloy in strength and corrosion resistance.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Excellent | AWS A5.14 ERNiCrCoMo-1 (Filler Metal 617) |
| GMAW / MIG | Excellent | AWS A5.14 ERNiCrCoMo-1 (Filler Metal 617) |
| SMAW / stick | Good | AWS A5.11 ENiCrCoMo-1 (Electrode 117) |
After cold forming and welding, a re-solution anneal at 1121 °C (2050 °F) is recommended to restore properties. Owing to its strength and work-hardening rate, joining techniques follow standard nickel-alloy practice.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Tooling | Sharp tools, positive rake angles to minimise work hardening |
| Cutting parameters | Sufficient feed and depth of cut to avoid burnishing |
| Work hardening | High rate; rigid setup, keep tool engaged |
| Preferred condition | Solution-annealed |
Forming Processes
| Process | Notes |
|---|---|
| Hot forming / forging | 1010–1205 °C; light working down to 925 °C; high forces due to elevated-temperature strength |
| Cold forming | Readily cold-formed; high work-hardening rate; cold-form in fine-grain condition with frequent intermediate anneals |
| Annealing for cold forming | 1040 °C |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Aerospace gas turbines | Ducting, combustion cans, transition liners | High-temperature strength + oxidation resistance over 980 °C |
| Land-based gas turbines | Hot gas path structures, combustion components | Creep + low-cycle-fatigue strength |
| Chemical / petrochemical | Catalyst-grid supports (nitric acid), reformer tubes | Carburisation and oxidation resistance |
| Thermal processing | Heat-treating baskets, reduction boats (Mo refining) | High-temperature corrosion resistance |
| Power generation | Fossil-fuelled and nuclear plant components, ultrasupercritical boiler tubes | Creep-rupture strength + metallurgical stability |
| Product Form | ASTM Standard | ASME Code | AMS Standard |
|---|---|---|---|
| Rod, bar and wire | ASTM B166 | ASME SB-166 | AMS 5887 |
| Forgings | ASTM B564 | ASME SB-564 | — |
| Plate, sheet and strip | ASTM B168 | ASME SB-168 | AMS 5888 / 5889 |
| Pipe | ASTM B546 | ASME SB-546 | — |
| Welding consumables | AWS A5.14 ERNiCrCoMo-1 · AWS A5.11 ENiCrCoMo-1 | — | — |
ASME Boiler and Pressure Vessel Code: allowable design stresses defined to 1800 °F (one of few alloys covered to this temperature).
| Inconel Grade | Ni % | Cr % | Mo % | UTS (annealed) | Max Temp. | Best Used For |
|---|---|---|---|---|---|---|
| Inconel 617 | 44.5 | 20–24 | 8–10 | ~734 MPa | ~1100 °C | Gas-turbine combustion; ducting; max creep+oxidation |
| Inconel 625 | ≥58 | 20–23 | 8–10 | ~830 MPa | ~980 °C | Universal corrosion resistance; seawater |
| Inconel 601 | 58–63 | 21–25 | — | ~550 MPa | ~1250 °C(ox) | Cyclic oxidation; radiant tubes |
| Inconel 600 | ≥72 | 14–17 | — | ~655 MPa | ~1095 °C | General high-temp; carburisation/nitriding |
| Inconel 602CA | bal | 24–26 | — | ≥675 MPa | ~1200 °C | Extreme oxidation + creep; furnace rolls |
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