Nickel-Copper Alloy, Open-Die Forgings

Nu30Fe Forgings (NiCu30Fe / UNS N04400 / W.Nr. 2.4360)

Q: What is the chemical composition of Nu30Fe?

Nu30Fe (UNS N04400) chemistry limits are: nickel 63.0 to 70.0 percent, copper 28.0 to 34.0 percent, iron 2.5 percent max, manganese 2.00 percent max, carbon 0.30 percent max, silicon 0.50 percent max and sulfur 0.024 percent max.

Q: What is the maximum service temperature of Nu30Fe?

Nu30Fe is generally used up to about 425 degrees Celsius, with approximately 480 degrees Celsius permitted under ASME Boiler and Pressure Vessel Code rules and a range of minus 10 to 425 degrees Celsius under VdTUV material sheet 263. It has no ductile-to-brittle transition, so it also performs well at cryogenic temperatures.

Q: Which standards do your Nu30Fe forgings comply with?

Jiangyin Jiangnan Metal supplies Nu30Fe forgings to ASTM B564 / ASME SB-564 for nickel alloy forgings, ASTM B164 / ASME SB-164 for rod and bar, DIN 17743 for chemistry, DIN 17752 for bar and DIN 17754 for forgings, with VdTUV 263 and NACE MR0175 / ISO 15156 compliance available on request.

Q: What is the largest Nu30Fe forging you can produce?

Single-piece forged weight up to approximately 10 tonnes. Seamless rolled rings from 200 mm to 4000 mm outside diameter, forged round bars from 50 mm to 1200 mm diameter, and discs and blocks up to 2500 mm across. Send a drawing to sales@steelforgepieces.com to confirm feasibility for your part.

Seamless rolled rings, forged flanges, round bars, discs, sleeves, shafts and tube sheets in nickel-copper alloy Nu30Fe, forged to ASTM B564 / ASME SB-564 and DIN 17754 by Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory in Jiangyin, Jiangsu, China.

Nu30Fe in brief

Nu30Fe, usually written NiCu30Fe, is a nickel-copper alloy with roughly 63 to 70 % nickel and 28 to 34 % copper. Its other designations are UNS N04400, W.Nr. 2.4360, AFNOR NU30 and BS NA13. The same alloy is sold commercially as Alloy 400 or Monel® 400.

Nickel and copper dissolve completely in one another, so the alloy is single phase and has no precipitate to age. Strength can therefore be raised by cold work only, never by heat treatment. What it does offer is toughness from cryogenic temperature up to about 425 °C, very good behaviour in seawater and hydrofluoric acid, and strong resistance to chloride stress-corrosion cracking.

We forge Nu30Fe in our own shop up to about 10 tonnes a piece. Every part leaves with an EN 10204 3.1 certificate, and 3.2 with third-party witness if your specification asks for it. Send a drawing to sales@steelforgepieces.com or call 0086-189-2135-9659 and we will come back with weight, price and lead time, usually the same working day.

Common name: Nu30Fe / NiCu30Fe
UNS number: N04400
Werkstoff Nr.: 2.4360
Alloy family: Nickel-copper (Ni-Cu)
Density: 8.80 g/cm³
Melting range: 1300 to 1350 °C
Forging spec: ASTM B564 / DIN 17754
Max forged weight: about 10 tonnes per piece

What Nu30Fe is

Nu30Fe is a wrought nickel-copper alloy with a face-centred cubic, single-phase structure. Nickel and copper are mutually soluble over the whole composition range, so no second phase forms and there is nothing available to precipitate during ageing. That single fact explains most of how the alloy behaves in service.

Annealed forgings come out soft and very ductile, typically 35 to 50 % elongation. Higher strength has to come from cold work, or from leaving the part in the as-forged condition. There is no ductile-to-brittle transition, which is why the alloy turns up in cryogenic valve and pump parts. The high nickel content gives good resistance to chloride stress-corrosion cracking, while the copper is what earns the alloy its reputation in hydrofluoric and dilute sulfuric acid.

A word about the name. Buyers often write "Nu30Fe" when the drawing means NiCu30Fe, the EN chemical designation for W.Nr. 2.4360, and sometimes the French designation NU30 gets mixed into it as well. All of them are the same material, UNS N04400. If your drawing says Nu30Fe, NiCu30Fe, NU30, NU-30M, NA13, Alloy 400 or 2.4360, we forge the same grade.

Equivalent grades and specifications

Table 1 lists the designations and standards that cover this alloy. It is the quickest way to confirm that a drawing callout and a mill certificate are describing the same material.

Table 1. Nu30Fe (NiCu30Fe) international grade cross-reference
System or country	Designation	Notes
UNS (USA)	N04400	Primary designation used on most mill certificates
Werkstoff-Nr. (Germany)	2.4360, also 2.4361	2.4361 is the tighter low-carbon variant
EN chemical name	NiCu30Fe	Source of the "Nu30Fe" spelling
AFNOR (France)	NU30, NU-30M	-
BS (UK)	NA13, BS 3072 to 3076	-
Common trade name	Alloy 400, Monel® 400	MONEL® is a registered trademark of Special Metals Corporation
Forgings	ASTM B564 / ASME SB-564, DIN 17754	Rings, flanges, discs, blocks, shafts
Rod and bar	ASTM B164 / ASME SB-164, DIN 17752	Chemistry and mechanical minima
Chemistry (DIN)	DIN 17743	Nickel wrought alloys with copper
Plate, sheet, strip	ASTM B127, DIN 17750	-
Seamless tube	ASTM B163, ASTM B165, DIN 17751	-
Aerospace	SAE AMS 4675, AMS 4544, AMS 7233	On request
Pressure equipment	VdTÜV Material Sheet 263	Approved from -10 °C to 425 °C
Sour service	NACE MR0175 / ISO 15156, MR0103	On request
Military and US government	QQ-N-281	Forms 1 and 2, forgings and bar

Chemical composition of Nu30Fe

The limits below follow ASTM B164 for UNS N04400 and match the DIN 17743 range for NiCu30Fe. Every heat we forge is checked by spectrographic analysis and the result is printed on the EN 10204 3.1 certificate.

Table 2. Nu30Fe / NiCu30Fe (UNS N04400) chemical composition, weight percent
Element	Symbol	Min %	Max %
Nickel	Ni	63.0	70.0
Copper	Cu	28.0	34.0
Iron	Fe	-	2.50
Manganese	Mn	-	2.00
Carbon	C	-	0.30
Silicon	Si	-	0.50
Sulfur	S	-	0.024

Nickel is the balance. Where a customer specification calls for tighter limits, for example reduced carbon for welded fabrication or controlled sulfur for sour service, we can melt to the restricted range.

Mechanical properties of Nu30Fe forgings

The first row of Table 3 gives the guaranteed minimum values of ASTM B164 for annealed bar. Those are the figures we certify against unless your specification states something else. The remaining rows are typical values for design guidance.

Table 3. Nu30Fe room-temperature mechanical properties
Form	Condition	Tensile strength MPa (ksi)	Yield strength 0.2 % MPa (ksi)	Elongation in 4D or 2 in, %	Hardness
Bar or forging	Annealed, ASTM B164 minimum	480 (70.0) min	170 (25.0) min	35 min	110 to 150 HB
Bar or forging	Annealed, typical	480 to 585 (70 to 85)	170 to 345 (25 to 50)	35 to 50	110 to 150 HB
Forging	Hot-finished or as-forged, typical	550 to 690 (80 to 100)	275 to 480 (40 to 70)	30 to 45	140 to 190 HB
Bar	Cold-drawn, stress-relieved, typical	620 to 760 (90 to 110)	415 to 620 (60 to 90)	15 to 30	175 to 230 HB

Typical values are indicative only. They shift with section size, reduction ratio and heat-treatment cycle, and the mill test certificate for your specific heat and test location is the contractual document. Tell us the minimum yield strength you need and where the test piece has to be taken from, whether surface, mid-radius or half thickness, and we will confirm what is achievable before the order is placed.

Physical properties of Nu30Fe

Table 4. Nu30Fe / NiCu30Fe physical properties, room temperature unless noted
Property	Metric	Imperial
Density	8.80 g/cm³	0.318 lb/in³
Melting range	1300 to 1350 °C	2370 to 2460 °F
Modulus of elasticity in tension	about 180 GPa	about 26 × 10³ ksi
Poisson's ratio	0.32
Specific heat at 20 °C	427 J/kg·K	0.102 Btu/lb·°F
Thermal conductivity at 20 °C	about 21.8 W/m·K	about 151 Btu·in/ft²·h·°F
Mean coefficient of thermal expansion, 20 to 100 °C	13.9 µm/m·K	7.7 µin/in·°F
Electrical resistivity at 20 °C	about 547 nΩ·m	about 329 Ω·circ mil/ft
Curie temperature	20 to 50 °C	70 to 120 °F
Magnetic response	Weakly ferromagnetic near room temperature, non-magnetic above the Curie point

Melting route and heat treatment

Melting

Nu30Fe billet for our forgings is produced by EAF melting with AOD or VOD refining. ESR remelting is available where a specification calls for improved cleanliness, reduced segregation or tighter ultrasonic acceptance criteria. In practice ESR is usually specified for thick-section pressure parts and for sour-service components.

Heat treatment

Since Nu30Fe cannot be age-hardened, only two conditions are meaningful for forgings.

Table 5. Heat-treatment conditions for Nu30Fe forgings
Condition	Typical cycle	Purpose
Annealed (soft)	760 to 900 °C, hold to section, rapid cool	Maximum ductility and formability, the standard supply condition
Stress-relieved	540 to 650 °C, hold, controlled cool	Removes cold-work or machining stresses while keeping strength

Furnace charts and heat-treatment records are issued with the 3.1 certificate. If your drawing calls for a solution-plus-ageing cycle, please check the grade before ordering, because that route applies to the precipitation-hardenable Alloy K-500 (UNS N05500), not to Nu30Fe.

Corrosion performance

Nu30Fe works best in reducing environments and does better than higher-copper alloys in mildly oxidising ones. The main points to be aware of:

Hydrofluoric acid: among the most resistant of all engineering alloys, at any concentration up to the boiling point.
Seawater: excellent in flowing conditions. Where the water is stagnant, pitting and crevice corrosion can start, so either design for flow or move to a more resistant grade.
Sulfuric and hydrochloric acid: good at moderate concentration and temperature, provided the solution is free of oxidising contaminants such as ferric or cupric ions, or aeration.
Chloride stress-corrosion cracking: highly resistant, which is a large part of why the alloy is used offshore and in desalination.
Alkalis and salts: resistant to caustic and to neutral and alkaline salt solutions.
Avoid strongly oxidising media, including nitric acid, ferric chloride, wet chlorine, and ammonia where moisture and oxygen are both present.

If the service is more aggressive than that, it may be worth looking at Hastelloy C-276, Inconel 625 or Incoloy 825. We forge all of them and are happy to advise.

Nu30Fe forged product forms we supply

Everything listed below is produced by open-die forging or ring rolling from Nu30Fe billet. Nothing is cut from plate or bar stock, so the grain flow follows the contour of the part.

Parts can be supplied as-forged (black), rough machined with allowance, or finish machined to drawing. Please state which you need in your enquiry, since it makes a real difference to the price.

Nu30Fe forging size capability

Table 6. Open-die forging capability for Nu30Fe at Jiangyin Jiangnan Metal Co., Ltd.
Product form	Dimensional range	Weight range
Seamless rolled rings	OD 200 to 4000 mm, height to 1000 mm, wall 30 to 500 mm	5 kg to 10 t
Forged round bars	Ø 50 to 1200 mm, length to 8000 mm	10 kg to 8 t
Discs and blanks	Ø 150 to 2500 mm, thickness 30 to 800 mm	5 kg to 10 t
Blocks and slabs	Up to 3000 × 1500 × 800 mm	20 kg to 10 t
Sleeves, bushings, hollows	OD 100 to 1500 mm, ID from 60 mm, length to 3000 mm	5 kg to 6 t
Shafts and spindles	Ø 80 to 900 mm, length to 8000 mm	20 kg to 8 t
Tube sheets	Ø to 3000 mm, thickness to 600 mm	Up to 10 t
Flanges	OD 150 to 3000 mm	5 kg to 6 t

Minimum order quantity is one piece. Lead time normally runs 25 to 45 days from order confirmation, depending on melt availability, section size and how much machining is involved. If your part falls outside these ranges, send the drawing anyway and we will tell you straight away whether we can forge it.

How we manufacture Nu30Fe forgings

Drawing review and forging design. We work out forging weight, reduction ratio and machining allowance, and confirm what mechanical properties are realistic for your section size.
Billet supply. Traceable Nu30Fe billet from EAF plus AOD or VOD, with ESR where specified, carrying heat-number traceability from melt through to shipment.
Heating. Controlled soak in a calibrated furnace within the forging window. Nickel-copper alloys pick up sulfur readily, so furnace atmosphere and fuel are controlled.
Open-die forging or ring rolling. Upsetting and drawing to reach the specified reduction ratio, giving continuous grain flow along the contour of the part.
Heat treatment. Annealing or stress relief per Table 5, with recorded furnace charts.
Rough or finish machining. Turning, boring, drilling and milling to your drawing.
Testing and NDT. Chemistry, mechanical testing, ultrasonic and penetrant inspection, hardness and PMI.
Certification and packing. EN 10204 3.1 or 3.2 certificate, marking, rust-free packing for sea freight, and export documentation.

Testing, NDT and certification

Destructive and chemical testing

Spectrographic chemical analysis, heat and product analysis
Tensile test to ASTM E8 or ISO 6892-1
Charpy V-notch impact to ASTM E23 or ISO 148, including sub-zero
Brinell and Rockwell hardness
Grain size, micro and macro examination
Intergranular corrosion testing on request

Non-destructive testing

Ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388
Liquid penetrant to ASTM E165 or EN 10228-2
Positive material identification by XRF or OES
Dimensional inspection report
Third-party witnessed inspection by TÜV, SGS, BV, DNV or Lloyd's Register

Every Nu30Fe forging is supplied with an EN 10204 3.1 mill test certificate covering heat chemistry, mechanical results, heat-treatment record and NDT results. EN 10204 3.2 certification, witnessed and countersigned by an independent third party, is available on request. Please raise it at enquiry stage, because it affects both price and lead time.

Nu30Fe applications by industry

Table 7. Typical Nu30Fe forged components by industry
Industry	Typical Nu30Fe forged components
Oil and gas, offshore	Subsea and deepwater production components, wellhead and Christmas-tree parts, forged blocks, hubs and connectors
Chemical processing	Hydrofluoric acid plant parts, reactor and column internals, pump and agitator shafts, forged nozzles
Marine and shipbuilding	Propeller and pump shafts, seawater pump casings, marine fixtures and fasteners, sleeves and bushings
Valves and flow control	Valve bodies, bonnets, stems, seat rings, and gate, globe, ball and check valve components
Pressure vessels and heat exchangers	Tube sheets, shell flanges, forged pipe and tubes, air receivers, deaerator and feedwater heater parts
Power generation	Turbine and gas-compressor components, gearbox shafts, forged rings for power transmission
Desalination	High-pressure pump shafts, sleeves and seawater-wetted forged parts
Pulp, paper and pharmaceutical	Forged rolls, wheels, manifolds, crystalliser and process-module components

Request a Nu30Fe forging quotation

Send a drawing in PDF, DWG or STEP format, or simply the finished dimensions. We reply with forging weight, price and lead time, normally within 24 hours, in English or Chinese.

Include these six items and we can quote in one round:

Grade: Nu30Fe, NiCu30Fe or UNS N04400, plus any customer specification number
Drawing or dimensions, and whether they are finished or rough size
Quantity, and whether repeat orders are expected
Supply condition: as-forged, rough machined, or finish machined
Heat treatment condition and any required minimum mechanical properties
NDT requirement and certificate type, EN 10204 3.1 or 3.2

Email sales@steelforgepieces.com Call 0086-189-2135-9659

Frequently asked questions about Nu30Fe

What is Nu30Fe?

Nu30Fe is a nickel-copper solid-solution alloy containing roughly 63 to 70 % nickel and 28 to 34 % copper. It is more commonly written NiCu30Fe and is designated UNS N04400 and W.Nr. 2.4360, with AFNOR NU30 and BS NA13 as further equivalents. It cannot be hardened by heat treatment, so strength is raised only by cold work. It is used where high toughness plus resistance to seawater, hydrofluoric acid and reducing acids is required.

Is Nu30Fe the same as Monel 400?

Yes. Nu30Fe or NiCu30Fe (UNS N04400, W.Nr. 2.4360) is the generic designation for the alloy sold commercially as Alloy 400 or Monel® 400. MONEL® is a registered trademark of Special Metals Corporation. Jiangyin Jiangnan Metal Co., Ltd. supplies the equivalent generic grade to UNS N04400 and DIN 17743 chemistry, not trademarked material.

What is the chemical composition of Nu30Fe?

Nickel 63.0 to 70.0 %, copper 28.0 to 34.0 %, iron 2.5 % max, manganese 2.00 % max, carbon 0.30 % max, silicon 0.50 % max and sulfur 0.024 % max. See Table 2 above.

Can Nu30Fe be hardened by heat treatment?

No. Nu30Fe is a single-phase solid-solution alloy with no precipitation-hardening mechanism, so it cannot be strengthened by ageing or quenching. Strength is increased only by cold working. Forgings are normally supplied annealed at 760 to 900 °C followed by rapid cooling, or stress-relieved at 540 to 650 °C.

What are the mechanical properties of Nu30Fe forgings?

For annealed bar, ASTM B164 minimum requirements are 480 MPa (70 ksi) tensile strength, 170 MPa (25 ksi) yield strength at 0.2 % offset and 35 % elongation. Typical annealed forgings run 480 to 585 MPa tensile, 170 to 345 MPa yield and 35 to 50 % elongation, with hardness around 110 to 150 HB.

What is the maximum service temperature of Nu30Fe?

Generally up to about 425 °C, with roughly 480 °C permitted under ASME Boiler and Pressure Vessel Code rules and a range of -10 °C to 425 °C under VdTÜV material sheet 263. There is no ductile-to-brittle transition, so the alloy also performs well at cryogenic temperatures.

Which standards do your Nu30Fe forgings comply with?

ASTM B564 / ASME SB-564 for nickel alloy forgings, ASTM B164 / ASME SB-164 for rod and bar, DIN 17743 for chemistry, DIN 17752 for bar and DIN 17754 for forgings. VdTÜV 263 and NACE MR0175 / ISO 15156 compliance are available on request.

What is the largest Nu30Fe forging you can produce?

Single-piece forged weight up to about 10 tonnes: seamless rolled rings from 200 mm to 4000 mm outside diameter, forged round bars from 50 mm to 1200 mm diameter, and discs and blocks up to 2500 mm across. Send a drawing to sales@steelforgepieces.com to confirm feasibility for your part.

What non-destructive testing is carried out?

Ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388, plus liquid penetrant testing to ASTM E165 or EN 10228-2, dimensional inspection, hardness testing and positive material identification by XRF or optical emission spectroscopy.

What certificates are supplied?

Every Nu30Fe forging ships with an EN 10204 3.1 mill test certificate covering heat chemistry, mechanical test results, heat-treatment record and NDT results. EN 10204 3.2 certification witnessed by a third party such as TÜV, SGS, BV, DNV or Lloyd's Register is available on request.

How do I get a price for a Nu30Fe forging?

Email a drawing or the finished dimensions, quantity, specification, heat-treatment condition, NDT requirement and certificate type to sales@steelforgepieces.com, or call 0086-189-2135-9659. We respond with a quotation, forging weight and lead time, normally within 24 hours. Minimum order quantity is one piece.

Does Nu30Fe resist seawater and hydrofluoric acid?

Yes. Nu30Fe has excellent resistance to flowing seawater and is regarded as one of the most resistant engineering alloys to hydrofluoric acid at any concentration up to the boiling point. It also resists chloride stress-corrosion cracking. In stagnant seawater, pitting and crevice corrosion can occur, so flowing conditions are preferred.

About the manufacturer

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory based in Jiangyin, Jiangsu Province, China. We forge seamless rolled rings, flanges, bars, discs, blocks, sleeves, shafts, nozzles and tube sheets in carbon steel, alloy steel, tool steel, stainless steel and nickel alloys, including Nu30Fe (NiCu30Fe / UNS N04400) and the Inconel, Incoloy and Hastelloy grades, for the oil and gas, chemical, marine, power, valve and pressure-vessel industries worldwide.

Table 8. Supplier details for RFQ and vendor registration
Company name	Jiangyin Jiangnan Metal Co., Ltd.
Business type	Open-die forging factory, manufacturer
Address	No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
Telephone, WhatsApp, WeChat	0086-189-2135-9659
Email	sales@steelforgepieces.com
Website	www.steelforgepieces.com
Nearest ports	Shanghai and Zhangjiagang, Jiangsu, about two hours from the factory
Languages	English, Chinese
Certification issued	EN 10204 3.1 as standard, EN 10204 3.2 third-party on request
Minimum order quantity	1 piece

Related nickel alloy forgings we produce

How to cite this page. Jiangyin Jiangnan Metal Co., Ltd. (2026). Nu30Fe forgings (NiCu30Fe / UNS N04400 / W.Nr. 2.4360): datasheet and forging capability. https://www.steelforgepieces.com/Nickel-Alloy/Nu30Fe.html

Last reviewed 25 August 2026 by the technical sales team, Jiangyin Jiangnan Metal Co., Ltd., No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. sales@steelforgepieces.com, 0086-189-2135-9659.

Sources and disclaimer. Chemistry and mechanical minima follow ASTM B164 and ASTM B564 for UNS N04400, and DIN 17743 and DIN 17754 for NiCu30Fe. Typical values are indicative and are not a warranty. The mill test certificate for the supplied heat governs. MONEL®, INCONEL®, INCOLOY® and HASTELLOY® are registered trademarks of their respective owners and are used here only to identify equivalent grades.