Overview
What is 2.4646?
2.4646 is the European material number (Werkstoff-Nr.) for Alloy 214 — a nickel-chromium-aluminium alloy also known as Haynes 214, UNS N07214 and NiCr16AlFe. Its ~4.5% aluminium and 16% chromium form a dense, self-healing aluminium-oxide (Al₂O₃) scale at high temperature, giving 2.4646 the highest oxidation resistance of any wrought nickel or cobalt alloy above 950 °C — which is why it is specified for furnace hardware, gas-turbine seals and other severe high-temperature, oxidizing service.
As an open-die forging factory, Jiangyin Jiangnan Metal Co., Ltd. manufactures 2.4646 open-die forgings and seamless rolled rings to customer drawings — melted by EAF + VOD / ESR, forged and heat-treated in-house, ultrasonically tested, and delivered with EN 10204 3.1 or 3.2 certification.
Product forms
2.4646 forged products we supply
Every item is forged to the customer's size, weight or drawing. Typical 2.4646 (Alloy 214) forged product forms include:
- Forged rings
- Seamless rolled rings
- Forged flanges
- Forged round bars
- Forged disks & discs
- Forged shafts
- Forged sleeves
- Forged bushings
- Forged tube sheets
- Forged tubes & pipe
- Forged gears & spindles
- Forged blocks & nozzles
- Forged nozzles & rings
- Forged valve stems
- Forged valve seats & bodies
Technical data
Chemical composition of 2.4646
Nominal chemical composition of 2.4646 / Alloy 214 (weight %), balance nickel:
| Element | 2.4646 (Alloy 214) |
|---|---|
| Nickel (Ni) | Balance (~75) |
| Chromium (Cr) | 16 |
| Aluminium (Al) | 4.5 |
| Iron (Fe) | 3 |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.20 max |
| Zirconium (Zr) | 0.10 max |
| Carbon (C) | 0.05 |
| Yttrium (Y) | 0.01 |
| Boron (B) | 0.010 max |
Composition is indicative to UNS N07214 / Alloy 214 limits; the certified analysis of each heat is stated on the mill test report.
Technical data
Physical & mechanical properties
| Property | Value |
|---|---|
| Density | ≈ 8.05 g/cm³ |
| Melting range | ≈ 1380 – 1400 °C |
| Max oxidation service | up to ≈ 1150 °C |
| Structure | Face-centred cubic (austenitic) |
| Property | Value |
|---|---|
| Tensile strength | 1215 MPa |
| Yield strength | 1025 MPa |
| Elongation at break | 12.9% |
| Hardness (HRC) | 37.6 |
Physical values are typical/approximate; mechanical values are typical and vary with section size, product form and heat-treatment condition — actual properties are confirmed on the certificate. Additional hardness references: 348 HB · 378 HK · 364 HV.
Manufacturing
How we make 2.4646 forgings
- Melting: EAF + VOD refining with ESR (electro-slag remelting) for clean, homogeneous 2.4646 ingot.
- Open-die forging: rings, shafts, disks, blocks and bars forged from the ingot; seamless rings rolled to size.
- Heat treatment: solution annealing to the applicable specification, with additional thermal treatment on request.
- NDT: ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388.
- Testing: chemical analysis, mechanical testing and PMI as required.
- Certification: EN 10204 3.1 or 3.2 (third-party) material certificate with every order.
Specifications
Standards & equivalents
| System | Designation / standard |
|---|---|
| Werkstoff-Nr. (EN) | 2.4646 |
| EN / ISO name | NiCr16AlFe (NiCr16Al) |
| UNS | N07214 |
| Common / trade names | Alloy 214, Haynes 214 |
| Melting | EAF + VOD / ESR |
| Ultrasonic testing | EN 10228-3, SEP 1921, ASTM A388 |
| Certification | EN 10204 3.1 / 3.2 |
Alloy 214 is a proprietary high-temperature grade; forgings are supplied to the customer's material specification and drawing, with certified chemistry and testing as listed above.
Where it is used
Applications of 2.4646 forgings
Because of its outstanding high-temperature and cyclic-oxidation resistance, 2.4646 (Alloy 214) forged parts are used across hot-process industries:
01 Industrial furnaces & heat treatment
Furnace muffles, retorts, baskets, trays, rollers and fixtures operating in oxidizing atmospheres — forged rings, disks, sleeves and bars that must survive repeated thermal cycling.
02 Gas turbine & aerospace hot section
Honeycomb seals, combustion hardware and other hot-section components where a stable Al₂O₃ scale is needed above 950 °C — forged rings and blanks.
03 Chemical & petrochemical
Catalyst-grid supports, thermocouple protection tubes, columns, towers, preheaters and heat-exchanger parts — forged shafts, flanges, rings, tube sheets and pipe.
04 Power & energy
Components for turbines, gas compressors, nitrogen generators and offshore/onshore processing units — forged rings, spindles, bars and eccentric shafts.
05 Pumps & valves
Shafts for chemical and plunger pumps, plus valve stems, seats, seat rings, bodies and blocks for ball, check, globe, gate and plug valves.
06 Heavy industry
Kiln furniture and hardware, shipbuilding, heavy machinery, cement / sugar mills, and paper & pulp equipment — forged wheels, manifolds and rolls.
The manufacturer
Jiangyin Jiangnan Metal Co., Ltd.
An open-die forging factory in Jiangyin, China, producing carbon steel, alloy steel, tool steel, stainless steel and nickel-alloy forgings — including 2.4646 (Alloy 214) forged rings, seamless rolled rings, flanges, bars, disks, shafts, sleeves, bushings, tube sheets and pipe — made to customer drawings for the furnace, gas-turbine, chemical, power and heavy-machinery industries worldwide.
Address No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
Phone +86-189-2135-9659
Email sales@steelforgepieces.com
Web www.steelforgepieces.com
Answers
Frequently asked questions about 2.4646
What is 2.4646 equivalent to?
2.4646 is equivalent to Alloy 214, Haynes 214, UNS N07214 and the EN chemical designation NiCr16AlFe (also written NiCr16Al). All refer to the same nickel-chromium-aluminium high-temperature oxidation-resistant alloy.
What is the chemical composition of 2.4646?
Nickel balance (~75%), chromium 16%, aluminium 4.5%, iron 3%, manganese 0.50% max, silicon 0.20% max, zirconium 0.10% max, carbon 0.05%, yttrium 0.01% and boron 0.010% max.
Why does 2.4646 have such high oxidation resistance?
Above about 955 °C its high aluminium content forms a dense, adherent aluminium-oxide (Al₂O₃) scale instead of the weaker chromium-oxide scale of ordinary nickel alloys. A small yttrium addition keeps that scale from spalling during thermal cycling, giving superior resistance to high-temperature and cyclic oxidation up to about 1150 °C.
What forged forms of 2.4646 can you supply?
Forged rings, seamless rolled rings, flanges, round bars, disks and discs, shafts, sleeves, bushings, tube sheets, tubes and pipe, gears, spindles, blocks and nozzles — all made to your size or drawing.
What is 2.4646 (Alloy 214) used for?
Industrial furnace hardware and heat-treatment fixtures, gas-turbine honeycomb seals and combustion components, thermocouple protection tubes, catalyst-grid supports and other parts operating in hot, oxidizing atmospheres up to about 1150 °C.
Who manufactures 2.4646 open-die forgings?
Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. Contact +86-189-2135-9659 or sales@steelforgepieces.com.
How do I request a quote for 2.4646 forgings?
Send the required size, weight or drawing to sales@steelforgepieces.com or call +86-189-2135-9659. We will quote by product form, dimensions, quantity, applicable standard and required certification.
Need 2.4646 (Alloy 214) forgings?
Send us your size or drawing — we will quote the best price for your project.