Nickel alloy / AFNOR NC15Fe / W.-Nr. 2.4816
NC15FE Forgings Open-die forged rings, shafts, flanges, discs and sleeves in NiCr15Fe / Alloy 600
NC15FE is the AFNOR (French) designation for the nickel-chromium-iron solid-solution alloy known internationally as Alloy 600. The same material is also listed as NiCr15Fe, material number 2.4816, UNS N06600, ISO NiCr15Fe8 and British NA 14. It contains a minimum of 72 % nickel with 14 to 17 % chromium and 6 to 10 % iron, and is used from cryogenic temperatures up to about 1093 °C (2000 °F) where both oxidation resistance and chloride stress-corrosion cracking resistance are required.
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin, Jiangsu Province, China. It produces NC15FE in forged and rolled form to customer drawings: seamless rolled rings, shafts, flanges, round bars, discs, sleeves, bushings, tube sheets and forged pipe. Material is supplied with EN 10204 3.1 or 3.2 certification and ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388.
Grade identity
The same material is supplied under all of the designations below. Any of them on a drawing or enquiry refers to this grade.
- AFNOR (FR)
- NC15Fe
- EN / DIN name
- NiCr15Fe
- Material No.
- 2.4816
- UNS
- N06600
- ISO
- NiCr15Fe8
- BS (UK)
- NA 14
- Common name
- Alloy 600
- Alloy family
- Ni-Cr-Fe
What is NC15FE?
DIN 17742 / EN 10095 / VdTÜV 305
NC15FE is an austenitic, single-phase nickel-chromium-iron alloy. The high nickel content gives durability in reducing conditions and strong resistance to chloride-ion stress-corrosion cracking, which is the failure mode that most often rules out austenitic stainless steel. The chromium content raises oxidation and scaling resistance well above that of pure nickel, and the alloy became a standard material in furnace construction for that reason.
The alloy is not age-hardenable. It is supplied in the solution-annealed condition, and hardness can only be increased by cold work. Annealing begins at around 871 °C and is essentially complete after a short soak near 982 °C.
The service range is wide. NC15FE is usable from cryogenic temperatures up to about 1093 °C (2000 °F) for oxidation resistance, although continuous furnace service is normally specified up to around 1050 °C. The alloy is effectively non-magnetic in the annealed condition, with relative permeability close to unity.
Equivalent grades and applicable standards
| System | Designation | Typical standards (bar / forgings) |
|---|---|---|
| AFNOR (France) | NC15Fe | NF A 54-301 family |
| DIN / EN (Germany) | NiCr15Fe, 2.4816 | DIN 17742, DIN 17752, EN 10095, VdTÜV-Wbl. 305 |
| UNS (USA) | N06600 | ASTM B166 / ASME SB166, ASTM B564 / ASME SB564 |
| ISO | NiCr15Fe8 | ISO 9723, ISO 9725 |
| BS (UK) | NA 14 | BS 3075 NA14, BS 3076 NA14 |
| Trade names | Alloy 600, Inconel® 600, Nicrofer® 7216 | SAE AMS 5665; NACE MR0175 / ISO 15156, MR0103 for sour service |
Swipe the table sideways to see all columns.
Inconel® and Nicrofer® are registered trademarks of their respective owners and are listed here for cross-reference only. Jiangyin Jiangnan Metal Co., Ltd. is not affiliated with those trademark holders.
Chemical composition of NC15FE
Weight % per DIN 17742 / EN 10095
| Element | C | Si | Mn | P | S | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|---|
| Range, % | 0.05–0.10 | ≤ 0.50 | ≤ 1.00 | ≤ 0.020 | ≤ 0.015 | 14.0–17.0 | ≥ 72.0 | 6.0–10.0 |
| Element | Ti | Al | Cu | Co | B |
|---|---|---|---|---|---|
| Maximum, % | ≤ 0.30 | ≤ 0.30 | ≤ 0.50 | ≤ 1.00 | ≤ 0.006 |
Nickel is quoted inclusive of cobalt. The values shown are the standard limits. Actual heat analysis and product analysis for an order are reported on the EN 10204 certificate. Tighter limits, for example restricted carbon for LC-NiCr15Fe (2.4817), can be agreed at enquiry stage.
Mechanical properties
Solution annealed, room temperature
| Condition | Tensile strength Rm N/mm² |
Yield strength Rp0.2 N/mm² |
Elongation A5 % |
Brinell hardness HB |
|---|---|---|---|---|
| Solution annealed | ≥ 500 | ≥ 180 | ≥ 35 | ≤ 185 |
Properties vary with section size and sampling position. For heavy forgings, state the required test location (mid-radius, mid-thickness or prolongation) at enquiry stage so that the forging ratio and heat-treatment cycle can be planned to meet it.
Physical properties
Typical values at 20 °C unless stated
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.47 g/cm³ | 0.306 lb/in³ |
| Melting range | 1354–1413 °C | 2470–2575 °F |
| Modulus of elasticity | 214 GPa | 31.1 × 10⁶ psi |
| Thermal conductivity | 14.9 W/m·K | 8.6 Btu·ft/ft²·h·°F |
| Coefficient of thermal expansion | 13.3 µm/m·K | 7.4 × 10⁻⁶ in/in·°F |
| Specific heat | 444 J/kg·K | 0.106 Btu/lb·°F |
| Electrical resistivity | 1.03 µΩ·m | 620 Ω·cmil/ft |
| Magnetic permeability | ≈ 1.01 (non-magnetic) | ≈ 1.01 |
Published typical values for the alloy grade, given for design guidance. They are not guaranteed acceptance values and are not reported on the mill certificate unless separately agreed.
NC15FE forged products we supply
Made to drawing, open-die and ring rolling
All items below are produced to the customer's drawing or dimensional specification. There is no standard size catalogue. Send a drawing or a finished-size sketch for a quotation on the forged blank with machining allowance.
| Product form | Process route | Typical end use |
|---|---|---|
| Seamless rolled rings | Upset, punch, ring roll, solution anneal | Pressure vessel shells, turbine casings, flange blanks |
| Forged shafts and spindles | Open-die cogging, draw down | Chemical pumps, plunger pumps, gearboxes |
| Forged flanges | Upset, punch, ring roll or die forge | Piping, columns, heat exchanger connections |
| Forged discs and disks | Upset and flatten | Blind flanges, tube sheets, closures |
| Forged round bars | Open-die cogging | Machined valve components, fasteners, stock |
| Forged sleeves and bushings | Upset, punch, expand | Compressors, subsea equipment, bearing housings |
| Forged tube sheets | Upset and flatten, rough machine | Shell and tube heat exchangers |
| Forged pipe and hollow tube | Upset, punch, expand or trepan | High-pressure headers, nozzles |
| Forged blocks and valve bodies | Open-die forge to rectangular section | Ball, gate, globe, check and plug valves |
| Forged gear blanks | Upset, punch, ring roll | Power transmission, turbines, gas compressors |
Size, single-piece weight and available forging ratio are confirmed against the drawing at quotation. If a maximum outside diameter, wall thickness or single-piece weight applies, include it in the enquiry so that feasibility can be confirmed before quoting.
Melting, forging, heat treatment and testing
Traceable route, EN 10204 certified
Melting route
NC15FE stock is melted by EAF with VOD refining. ESR (electro-slag remelting) is available where the specification or the application calls for improved cleanliness and reduced segregation, for example nuclear, sour service or heavy-section forgings. State the required melting route in the enquiry, as it affects both price and lead time.
Heat treatment
NC15FE forgings are supplied solution annealed. The alloy is a solid-solution grade and does not respond to precipitation (ageing) heat treatment. Any drawing calling for NC15FE in an age-hardened condition should be reviewed, because it usually indicates that a different grade was intended, such as Alloy 718 (2.4668) or Alloy X-750. Stress relieving after rough machining can be applied where dimensional stability matters.
Non-destructive testing and certification
- Ultrasonic testing to EN 10228-3
- Ultrasonic testing to SEP 1921
- Ultrasonic testing to ASTM A388
- EN 10204 3.1 mill certificate
- EN 10204 3.2 third-party certificate
- Dye penetrant and magnetic particle inspection on request
- Mechanical testing: tensile, impact, hardness
- Intergranular corrosion testing on request
- Dimensional and roughness inspection report
Third-party witness and certification through TÜV, BV, DNV, SGS, Lloyd's or a customer-nominated inspector can be arranged. Nominate the body at order placement so that the inspection and test plan (ITP) is agreed before production starts.
Applications for NC15FE forgings by industry
Where the grade is specified
| Industry | Typical components in NC15FE |
|---|---|
| Chemical and petrochemical | Pump shafts and plunger pump parts, reactor internals, nozzles, forged pipe, agitator shafts |
| Pressure vessels and heat transfer | Tube sheets, forged flanges, shell rings, air receiver components, shell and tube heat exchanger parts |
| Columns, towers and process modules | Rolled rings, flanges, forged shafts, preheater components, silo and tank fittings |
| Oil and gas, subsea | Bushings, sleeves, discs, wellhead and Christmas tree components, deepwater production hardware |
| Valves | Valve stems, seat rings, valve blocks and bodies for ball, gate, globe, check and plug valves |
| Power and rotating equipment | Turbine rings, gear blanks, compressor spindles, gearbox shafts, generator components |
| Furnace and heat treatment | Retorts, muffles, fixtures and support structures for oxidising and carburising atmospheres |
| Nuclear and steam generation | Feedwater heater and moderator cooler components, where low-carbon 2.4817 is usually preferred |
| Heavy industry and marine | Forged rolls, wheels, manifolds, crankshafts, cement and sugar mill parts, shipbuilding forgings |
| Pulp, paper and pharmaceutical | Digester and bleaching plant hardware, crystalliser components, sanitary process equipment |
Information needed for an NC15FE quotation
Enquiry checklist
- Designation to be stamped. Confirm whether the certificate must read NC15FE, NiCr15Fe, 2.4816, UNS N06600 or Alloy 600. Some end clients reject an otherwise correct certificate over the wording.
- Governing standard. DIN 17742, ASTM B564, EN 10095, VdTÜV 305, NACE MR0175, or a customer specification.
- Drawing or finished dimensions, with tolerances, and whether the part is supplied as-forged, rough-turned or semi-machined.
- Quantity and delivery date, including whether the order is a one-off, a prototype, or a repeat series.
- Melting route. EAF+VOD as standard, or ESR remelt if required.
- Testing and certification. UT standard and acceptance class, EN 10204 3.1 or 3.2, and any third-party witness.
- Test sampling position. Critical for heavy sections. Specify surface, mid-radius or centre.
- Destination port for a delivered price, or the preferred Incoterm.
NC15FE frequently asked questions
Is NC15FE the same as Inconel 600?
Yes. They are the same alloy under different naming systems. NC15FE is the AFNOR designation, NiCr15Fe / 2.4816 is the German and European designation, UNS N06600 is the American one, and Inconel® 600 is a registered trade name for the grade. All are defined by the same limits: minimum 72 % nickel, 14 to 17 % chromium and 6 to 10 % iron. A certificate stating any of these designations describes material of the same chemistry.
Can NC15FE be hardened by heat treatment?
No. NC15FE is a solid-solution alloy and is not age-hardenable. It is supplied solution annealed, and hardness can only be increased by cold working. If a drawing calls for NC15FE in an age-hardened or precipitation-hardened condition, the specification should be checked, because a precipitation-hardening nickel alloy such as 2.4668 (Alloy 718) may have been intended.
What is the maximum service temperature for NC15FE?
NC15FE resists oxidation and scaling up to approximately 1093 °C (2000 °F). For continuous service in furnace applications the practical limit is usually taken as around 1050 °C. At the other end of the range the alloy retains toughness down to cryogenic temperatures, so it is used across the full span from liquefied gas service to high-temperature process equipment.
Why is NC15FE chosen over stainless steel?
The main reason is resistance to chloride stress-corrosion cracking. Austenitic stainless steels such as 304 and 316 are vulnerable to it in hot chloride-bearing environments, while the high nickel content of NC15FE gives strong resistance. NC15FE also holds its strength and oxidation resistance at temperatures beyond the usable range of austenitic stainless steel, and it performs in both oxidising and reducing conditions.
What is the difference between NC15FE (2.4816) and LC-NiCr15Fe (2.4817)?
Carbon content. 2.4817 is the low-carbon version, typically restricted to about 0.025 % carbon or less, which improves resistance to intergranular corrosion and stress-corrosion cracking. It is normally preferred below 450 °C and for nuclear steam generator and caustic service. Above that temperature the standard carbon range of 2.4816 gives better creep strength. Both grades can be forged, so state which one the specification calls for.
What size NC15FE forgings can you make?
NC15FE forgings are produced to drawing rather than to a fixed size catalogue. The achievable envelope depends on the part geometry, the forging ratio required by the specification and the ingot size available for the grade. Send the drawing with the maximum outside diameter, wall thickness and single-piece weight, and Jiangyin Jiangnan Metal will confirm feasibility before quoting.
Do you supply NC15FE with EN 10204 3.2 certification?
Yes. Both EN 10204 3.1 mill certificates and EN 10204 3.2 third-party certificates are available. For 3.2 certification, nominate the inspection body, such as TÜV, BV, DNV, SGS or Lloyd's, when placing the order so that the inspection and test plan can be agreed before production begins.
What ultrasonic testing standards do you work to for NC15FE?
Ultrasonic testing is performed to EN 10228-3, SEP 1921 or ASTM A388 according to what the order specifies. Specify both the standard and the required acceptance class or quality level, because each standard covers several classes and the class drives the forging ratio and the inspection stage sequence.
How do I request a quotation for NC15FE forgings?
Email the drawing or dimensions to sales@steelforgepieces.com, or call +86 189 2135 9659. Include the governing standard, quantity, required certification and delivery date. The more of the enquiry checklist above that is supplied, the firmer the price will be.
Who manufactures NC15FE forgings in China?
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No. 1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. It produces NC15FE (NiCr15Fe / 2.4816 / Alloy 600) forgings and seamless rolled rings to customer drawings, together with other nickel alloy, stainless, tool, alloy and carbon steel grades. Jiangyin is in the Yangtze River Delta, about two hours from Shanghai port.
Related NC15FE and nickel alloy pages
Request an NC15FE forging quotation
Send a drawing for a price and lead time. Enquiries are answered in English and Chinese.
Company Jiangyin Jiangnan Metal Co., Ltd.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
Technical data on this page is published by Jiangyin Jiangnan Metal Co., Ltd. for engineering guidance. Last updated 22 August 2026. Where a customer specification conflicts with the values shown, the customer specification governs.