2.4869 Forgings Alloy 80/20, NiCr80-20, UNS N06003. Forged rings, rolled rings, flanges, discs, shafts and bars.

What is 2.4869 (Alloy 80/20)?

The 80 % nickel / 20 % chromium grade, the highest temperature member of the DIN 17470 heating conductor family.

2.4869 is a solid solution nickel-chromium alloy with an austenitic, face centred cubic structure. Iron is held to 1 % maximum, so the alloy forms an adherent Cr₂O₃ oxide layer that re-forms after each heating cycle. This is why 2.4869 holds up under repeated heating and cooling better than the leaner nickel-chromium-iron grades, where the scale spalls off and thins the section over time.

The 19 to 21 % chromium also gives a high and stable electrical resistivity of 1.12 Ω·mm²/m, which is why the alloy is best known as a resistance heating material. In forged form it is used for the hardware that sits inside the same hot zones: retort rings, furnace flanges, muffle end plates, element support discs and roller shafts.

2.4869 is not an age hardening alloy. Room temperature strength comes from solid solution strengthening and from the grain structure produced by forging and annealing, so forging reduction and solution annealing control the final properties.

Designations and equivalent standards

The names buyers use for this alloy, so a purchase order can be matched to the right grade.

DIN 17470 and 17471 cover heating conductor alloys as round and flat wire. DIN 17742 covers wrought nickel alloys with chromium. DIN 17750 and 17753 cover sheet, strip and wire. Forgings are supplied to the chemistry of these standards with mechanical properties agreed at order.

Chemical composition of 2.4869

Nickel balance with 19 to 21 % chromium and iron restricted to 1 % maximum.

Composition to DIN/EN data for 2.4869 (NiCr80-20). We melt by EAF plus VOD, with ESR remelting when required, and report the actual heat analysis on the EN 10204 3.1 certificate.

Mechanical and physical properties

Room temperature values in the solution annealed condition, metric and imperial.

Mechanical properties at 20 °C

Physical properties at 20 °C

Values are typical for the annealed condition. Creep strength drops sharply above about 900 °C, so 1200 °C is a scaling resistance limit and not a load bearing service limit. Send the operating temperature, stress and atmosphere and we will confirm whether 2.4869 or a creep resistant grade such as Alloy 602 or Haynes 230 suits the part.

2.4869 vs 2.4867 vs 1.4860: which grade do you need?

Many catalogues list 2.4869 with a 60 % nickel analysis. That analysis belongs to a different material number.

2.4869 (NiCr80-20, UNS N06003) and 2.4867 (NiCr 60 15, UNS N06004) are both DIN 17470 heating conductor alloys, which is why they get mixed up. They are not interchangeable. 2.4869 has about 80 % nickel with iron capped at 1 %. 2.4867 has about 60 % nickel with 22 to 25 % iron. The higher nickel content gives roughly 50 °C more scaling resistance and better behaviour under thermal cycling, at a higher price.

How to check what you are being offered: ask the supplier for the material number, the UNS number and the nickel percentage together. If a quotation says 2.4869 but the analysis shows Fe 21 to 25 % and Ni around 60 %, the material offered is 2.4867 / NiCr 60 15. We quote both grades and state clearly which one is priced.

Applications for 2.4869 forgings

Forged parts for furnace, heat treatment and thermal processing equipment.

Load bearing parts running continuously above about 900 °C should be checked against creep data. Send the operating temperature, stress and atmosphere with your enquiry and we will confirm grade suitability before quoting.

2.4869 forged products we supply

Open-die forged and ring rolled shapes, machined to drawing or supplied with machining allowance.

Delivery condition: as forged, rough machined, or finish machined to drawing. Surface condition and machining allowance are agreed at order.

How 2.4869 forgings are produced

Production route from melt to certificate.

1. MeltingElectric arc furnace with VOD refining. Electroslag remelting is added when tighter cleanliness or segregation control is required. The heat analysis is recorded and printed on the certificate.
2. Ingot heatingControlled soak to about 1180 °C. Nickel-chromium alloys conduct heat slowly, so soak time is set by section thickness to bring the core up to temperature.
3. Open-die forgingUpsetting and drawing on a hydraulic press between about 1180 °C and 950 °C, with reheats as needed, to break down the cast structure and reach the specified forging ratio.
4. Ring rollingFor rolled rings: piercing, then radial and axial rolling to final OD, ID and height. This gives continuous circumferential grain flow.
5. Solution annealingHeat treatment followed by rapid cooling to dissolve carbides and give a uniform austenitic grain size.
6. MachiningRough or finish machining to drawing, with the allowance agreed at order.
7. TestingChemical analysis, tensile and hardness testing, grain size, and ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388 as specified.
8. Certification and dispatchEN 10204 3.1 mill test certificate, or 3.2 with third party inspection by SGS, BV, TUV or Lloyd's. Marking, packing and export documents prepared.

Shop notes on forging 2.4869

• Forging range is about 1180 °C down to 950 °C. Finishing below 950 °C leaves a mixed grain structure that annealing will not correct.
• Reheat rather than keep forging once the surface falls below the finishing temperature.
• Solution anneal after the last forging operation and cool rapidly.
• The alloy work hardens during machining. Use a rigid setup, positive rake tooling, low cutting speed and a steady feed.

Testing, inspection and certification

What is supplied with the shipment.

How to order 2.4869 forgings

Send these six items and we will return a firm quotation.

• Grade: 2.4869 / NiCr80-20 / UNS N06003, or tell us the temperature and atmosphere and we will propose the grade.
• Drawing or dimensions: OD, ID, height, length and thickness in millimetres or inches. PDF, DWG or STEP files are all fine.
• Quantity: pieces per order and expected annual volume.
• Delivery condition: as forged, rough machined or finish machined.
• Testing and certificate: EN 10204 3.1 or 3.2, and whether ultrasonic testing is required.
• Destination port: for FOB, CIF or DDP pricing.

Quotations are normally returned within one working day. Minimum order is one piece for open-die forgings. Typical lead time is 25 to 45 days depending on section size, heat treatment and machining scope.

Frequently asked questions about 2.4869

Related nickel alloy forgings

Grades commonly compared with 2.4869 for furnace and high temperature service.

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Data sources and page information

Composition and property data on this page follow the DIN/EN designation system for material 2.4869 (NiCr80-20 / UNS N06003) and published data for heating conductor alloys under DIN 17470, DIN 17471, DIN 17742, DIN 17750 and DIN 17753. Testing references are EN 10204, EN 10228-3, SEP 1921, ASTM A388, ASTM A370 and ASTM E112. Values are typical and given for guidance. The binding values for any order are those printed on the mill test certificate issued with the goods.

Published by: Jiangyin Jiangnan Metal Co., Ltd., open-die forging factory, Jiangyin City, Jiangsu Province, China.
Last reviewed: 10 August 2026 by the company's forging technical team.