2.4662 Forgings
2.4662 is the German Werkstoff number for Alloy 901 (also called Nimonic 901 or Incoloy 901, UNS N09901): a nickel-iron-chromium age-hardenable superalloy strengthened by titanium and aluminium precipitates, with molybdenum for solid-solution strengthening. Its substantial iron content gives it high strength and creep resistance to about 600 °C together with good forgeability. Jiangyin Jiangnan Metal forges 2.4662 to your drawing.
What Is 2.4662 (Alloy 901)?
2.4662 / Alloy 901 is a precipitation-hardenable nickel-iron-chromium superalloy developed for parts that must keep high yield strength and creep resistance at elevated temperature.
The alloy is hardened by ageing, which precipitates fine titanium- and aluminium-rich phases (γ′ and η-Ni₃Ti); molybdenum provides additional solid-solution strengthening. Because Alloy 901 carries a substantial iron content, it combines that high strength with good forging characteristics, and it offers good corrosion resistance in the atmospheres typical of jet-engine and gas-turbine service. It is most commonly used up to a maximum service temperature of about 600 °C (1110 °F).
Jiangyin Jiangnan Metal Co., Ltd. produces 2.4662 as open-die forgings and seamless rolled rings to the requirements of the client, delivered to DIN and the cross-referenced international standards below.
2.4662 Forged Products We Supply
We forge 2.4662 (Alloy 901) into a full range of shapes, machined to finish or supplied as forged blanks per your specification:
2.4662 Chemical Composition
Nominal chemical composition of 2.4662 / Alloy 901 (UNS N09901), weight %:
| Element | Min. | Max. | Comment |
|---|---|---|---|
| C | 0.020 | 0.060 | — |
| Mn | — | 0.500 | — |
| P | — | 0.020 | — |
| S | — | 0.020 | — |
| Si | — | 0.400 | — |
| Ni | 40.00 | 45.00 | — |
| Cr | 11.00 | 14.00 | — |
| Mo | 5.00 | 6.50 | Solid-solution strengthening |
| Cu | — | 0.200 | — |
| Ti | 2.80 | 3.10 | Precipitation hardening |
| B | 0.010 | 0.020 | — |
| Al | — | 0.350 | Precipitation hardening |
| Co | — | 1.000 | — |
| Fe | — | — | Balance |
Values are typical for the DIN 2.4662 specification and may be adjusted to the applicable AMS, ISO or GB grade on request.
2.4662 Mechanical Properties
Typical room-temperature mechanical properties of 2.4662 / Alloy 901 in the solution-treated and aged condition:
| Property | Value |
|---|---|
| Yield strength, Rp0.2 | 810 MPa |
| Tensile strength, Rm | 1130 MPa |
| Elongation, A | 10 % |
| Reduction of area | 15 % |
| Hardness | 341 HB |
2.4662 Physical Properties
| Property | Value |
|---|---|
| Density | 8.21 g/cm³ |
| Melting range | 1330–1360 °C |
| Modulus of elasticity | 214 GPa |
| Specific heat (20 °C) | 440 J/kg·K |
| Thermal conductivity | 12.5 W/m·K |
| Mean coefficient of thermal expansion | 13.5 µm/m·K |
| Maximum service temperature | ≈ 600 °C (1110 °F) |
2.4662 Equivalent Grades & Specifications
2.4662 is cross-referenced to the following designations and standards:
| Standard / system | Designation |
|---|---|
| Germany — Werkstoff (W.Nr.) | 2.4662 |
| USA — UNS | N09901 |
| Common trade names | Alloy 901, Nimonic 901, Incoloy 901 |
| China — GB | GH2901 |
| USA — AMS (bar & forgings) | AMS 5660, AMS 5661 |
| USA — AMS (welding wire) | AMS 5830 |
| UK — BS | HR 55 |
| ISO | ISO 9723, ISO 9725 |
Cross-references are provided as a guide for material selection; confirm the exact grade and standard required for your project when requesting a quote.
Applications of 2.4662 Forgings
Because of its strength and creep resistance at temperature, 2.4662 (Alloy 901) forgings are used in industries such as:
- Gas turbines and aero-engines: discs, shafts, rings, casings and seals.
- Pumps: seamless rolled rings and shafts for chemical and plunger pumps.
- Pressure vessels and heat exchangers: shafts, pipes, tubes, tube sheets and flanges for air receivers and shell-and-tube exchangers.
- Process plant: flanges, rings and pipes for columns, towers, tanks, silos and preheaters.
- Offshore oil and gas: bushings, sleeves and discs for subsea and deepwater production, wellhead and Christmas-tree equipment.
- Valves: stems, seats, seat rings, bodies and blocks for ball, gate, globe, check and plug valves.
- Power transmission: rings, spindles, bars and gears for turbines, gas compressors and gearboxes.
- Heavy machinery: crankshafts, wheels, manifolds and rolls for cement, sugar and concrete mills, shipbuilding, pulp and paper and pharmaceutical plant.
Manufacturing, Heat Treatment & Quality
Melting
2.4662 is melted by clean routes such as EAF + VOD followed by ESR (electroslag remelting); VIM + VAR / VIM + ESR are also used to achieve the metallurgical purity needed for creep-life and stress-rupture performance.
Open-die forging
Forging is carried out between about 1010 °C and 1121 °C (1850–2050 °F) metal temperature. Billets are charged into a hot furnace and heated rapidly through the precipitation-hardening range; metal temperature is kept at or below 1121 °C during rapid working.
Heat treatment
Parts are supplied age-hardened: solution treatment followed by ageing (precipitation hardening), typically with a double-ageing / stabilisation cycle to develop full mechanical and creep properties. Welding, where required, is done in the solution-treated condition.
Testing & certification
Forgings are ultrasonically tested to EN 10228-3, SEP 1921 or ASTM A388 as specified, and supplied with EN 10204 3.1 certificates, or third-party EN 10204 3.2 certificates on request.
2.4662 (Alloy 901) — FAQ
What is material 2.4662?
What are the equivalents of 2.4662?
What is 2.4662 (Alloy 901) used for?
What is the maximum service temperature of 2.4662?
How is 2.4662 heat treated?
Can you supply 2.4662 forgings with material certificates?
Who manufactures 2.4662 open-die forgings?
About the Manufacturer
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory based in Jiangyin, Jiangsu Province, China. We produce forged rings, seamless rolled rings, flanges, bars, shafts, discs and other open-die forgings in carbon steel, alloy steel, tool steel, stainless steel and nickel alloys, including 2.4662 / Alloy 901.
Every 2.4662 forging is made to the client's drawing or sizes, melted by clean ESR-grade routes, forged and heat-treated in-house, and delivered with ultrasonic testing and EN 10204 3.1 / 3.2 certification. Send us your requirement and we will quote the best price for your side.
Need 2.4662 Forgings?
Send us the size or drawing of the 2.4662 / Alloy 901 forged part you need — rings, flanges, shafts, bars, discs or tube sheets — and we will quote the best price, with full certification.