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
2.4665 is the German material number for a nickel-chromium-iron-molybdenum high-temperature alloy. This datasheet presents the material within the Werkstoff-Nummer (DIN / EN) designation system.
A solid-solution-strengthened superalloy of the Ni-Cr-Fe-Mo family, 2.4665 possesses an exceptional combination of oxidation resistance, fabricability and high-temperature strength, with creep and stress-rupture properties useful to about 1200 °C. The high nickel content improves resistance to carburisation, nitridation and chlorination; chromium provides oxidation and carburisation resistance; and molybdenum and tungsten enhance high-temperature creep strength. It is exceptionally resistant to stress-corrosion cracking in petrochemical applications and retains good ductility after prolonged exposure at 650, 760 and 870 °C. With excellent forming and welding characteristics, it is supplied in the solution heat-treated condition.
Typical applications include gas-turbine combustion-zone components — transition ducts, combustor cans, spray bars and flame holders — afterburners, tailpipes and cabin heaters, and industrial-furnace rolls, retorts, baffles and muffles.
| Property | Value | Unit |
|---|---|---|
| Density | 8.22 | g/cm³ |
| Melting range | 1260–1355 | °C |
| Elastic modulus | 205 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 13.9 | µm/m·°C |
| Thermal conductivity (20 °C) | 9.1 | W/m·K |
| Specific heat (20 °C) | 486 | J/kg·K |
| Structure | Austenitic (FCC), single phase | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel | Ni | Balance | — | Base element; carburisation / nitridation resistance |
| Chromium | Cr | 20.5 | 23.0 | Oxidation / carburisation resistance |
| Iron | Fe | 17.0 | 20.0 | Solid-solution; cost-effectiveness |
| Molybdenum | Mo | 8.0 | 10.0 | High-temperature creep strength |
| Cobalt | Co | 0.50 | 2.50 | High-temperature strength |
| Tungsten | W | 0.20 | 1.0 | Creep / oxidation resistance |
| Manganese | Mn | — | 1.0 | Deoxidiser |
| Silicon | Si | — | 1.0 | Oxidation resistance |
| Carbon | C | 0.05 | 0.15 | Carbide strengthening |
Solution heat-treated condition, per EN reference data for W.Nr. 2.4665.
| Condition | Property | Value |
|---|---|---|
| Solution annealed | Tensile strength (Rm) | ≥755 MPa |
| Solution annealed | 0.2% proof strength (Rp0.2) | ≥385 MPa |
| Solution annealed | Elongation (A5) | ≥45 % |
| At elevated temperature | Creep / rupture strength | Useful to ~1200 °C |
| — | Elastic modulus | 205 GPa |
Values per EN reference data; the alloy retains good ductility after long-time exposure at high temperature. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation (to ~1200 °C) | Excellent | Adherent chromia scale |
| Carburisation | Excellent | Best among Ni / Co alloys |
| Reducing / neutral atmospheres | Excellent | Balanced resistance |
| Hot corrosion / molten salts | Very Good | Low attack in tests |
| Stress-corrosion cracking | Excellent | Petrochemical service |
The balanced chromium, molybdenum and nickel content gives an exceptional combination of resistance to oxidizing, reducing and neutral atmospheres at high temperature, with outstanding carburisation resistance and excellent resistance to stress-corrosion cracking.
A single-phase solid-solution alloy; not hardenable by precipitation. Properties are set by solution annealing.
Solution Anneal Solution anneal sheet and tube at approximately 1175 °C and rapidly cool (air or water). Bar and forgings are held at about 1177 °C long enough to bring the section to temperature, then rapidly cooled. The alloy is not strengthened by heat treatment; all hot- or cold-worked parts should be annealed and rapidly cooled to restore the best balance of properties.
Excellent weldability; welded by shielded-metal-arc, gas-tungsten-arc and gas-metal-arc processes, and resistance welding, with matching filler. Welding is performed on solution-annealed material.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Excellent | Matching filler |
| GMAW / MIG | Good | Matching filler |
| SMAW / stick | Good | Matching electrode |
Weld on solution-annealed material with matching filler and clean surfaces.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Difficult; work-hardens, rigid setups, sharp tooling |
| Speeds | Slow speeds, positive feeds, no dwelling |
| Coolant | Ample coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Good ductility; work-hardens, anneal between heavy operations |
| Hot forming | ~1177 °C (held to temperature); anneal and rapid-cool afterward |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Aero gas turbine | Combustor cans, transition ducts, flame holders | Oxidation + high-temperature strength |
| Propulsion | Afterburners, tailpipes, cabin heaters | Thermal + oxidation resistance |
| Industrial furnaces | Rolls, retorts, baffles, muffles | Oxidizing/reducing/neutral atmospheres |
| Petrochemical | High-temperature equipment | Stress-corrosion-cracking resistance |
| Product Form | DIN / EN Standard | Notes |
|---|---|---|
| Plate, sheet and strip | DIN 17750 · W.Nr. 2.4665 | NiCr22Fe18Mo |
| Bar, rod and forgings | DIN 17752 · W.Nr. 2.4665 | — |
| Seamless pipe and tube | DIN 17751 · W.Nr. 2.4665 | — |
| Inspection documents | EN 10204 | — |
Nickel-chromium-iron-molybdenum high-temperature alloy. W.Nr. 2.4665 (NiCr22Fe18Mo).
| W.Nr. | Cr % | Mo % | Fe % | Best Used For |
|---|---|---|---|---|
| 2.4665 | 20.5–23 | 8–10 | 17–20 | Ni-Cr-Fe-Mo high-temp; gas-turbine combustors, furnace parts |
| 2.4856 | 20–23 | 8–10 | ≤5 | General Ni-Cr-Mo-Nb corrosion / strength (625) |
| 2.4819 | 14.5–16.5 | 15–17 | 4–7 | Reducing media, wet chlorine (C-276) |
| 2.4633 | 24–26 | — | 8–11 | High-temperature oxidation; aluminium-bearing (602 CA) |
| 1.4876 | 19–23 | — | balance | General high-temperature service (800H) |
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