NC22FeD is the French AFNOR designation for a solid-solution-strengthened nickel-chromium-iron-molybdenum superalloy. The same material is designated UNS N06002, W.Nr. 2.4665 (NiCr22Fe18Mo), Alloy X, Hastelloy® X and GB GH3536. It resists oxidation to about 1,200 °C (2,200 °F), holds useful strength at high temperature, welds readily, and resists stress-corrosion cracking in petrochemical service.
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu, China. We forge NC22FeD into seamless rolled rings up to 2,500 mm outside diameter, discs to 1,800 mm, shafts to 8 m, bars from 25 to 500 mm diameter, and single pieces up to 8,000 kg. Material ships solution annealed to ASTM B564, ASTM B572 or AMS 5754 with EN 10204 3.1 or 3.2 certification. Contact sales@steelforgepieces.com or +86 189 2135 9659.
| Grade designation | NC22FeD (AFNOR NF, France) |
|---|---|
| International equivalents | UNS N06002, W.Nr. 2.4665, NiCr22Fe18Mo, Alloy X, Hastelloy® X, GH3536 |
| Alloy type | Solid-solution-strengthened Ni-Cr-Fe-Mo superalloy. Not precipitation hardenable. |
| Nominal chemistry | Ni bal., Cr 22, Fe 18, Mo 9, Co 1.5, W 0.6 |
| Delivery condition | Solution annealed 1,150 to 1,177 °C, rapid cooled |
| Oxidation resistance | to about 1,200 °C (2,200 °F) |
| Product forms forged | Seamless rolled rings, discs, shafts, flanges, round bars, sleeves, bushings, hollow bars, tube sheets, blanks to drawing |
| Size range | Rings to 2,500 mm OD. Discs to 1,800 mm. Shafts to 8,000 mm. Bars 25 to 500 mm. |
| Single-piece weight | 5 kg to 8,000 kg |
| Melting route | EAF + VOD + ESR. VIM + ESR on request. |
| Non-destructive testing | UT to EN 10228-3, SEP 1921 or ASTM A388. PT to ASTM E165. |
| Certification | EN 10204 3.1 (mill) or 3.2 (third party: TÜV, BV, SGS, Lloyd's) |
| Manufacturer | Jiangyin Jiangnan Metal Co., Ltd., Jiangyin, Jiangsu, China |
Figures above are our standard production envelope. Larger or heavier pieces are quoted case by case.
What is NC22FeD?
NC22FeD is a wrought nickel-base superalloy specified under the French AFNOR system. The letters follow the AFNOR convention: N for nickel, C22 for roughly 22 % chromium, Fe for the iron addition, D for molybdenum (molybdène). American, German, Chinese and trade specifications call the same material UNS N06002, W.Nr. 2.4665, GH3536 and Hastelloy® X.
Strength at temperature comes from solid solution hardening. Molybdenum at 8 to 10 %, cobalt at 0.5 to 2.5 % and tungsten at 0.2 to 1.0 % stiffen a nickel matrix that carries 20.5 to 23 % chromium for oxidation resistance and 17 to 20 % iron. There is no gamma prime or gamma double prime precipitate, which is why the alloy keeps its ductility after long exposure. Published data show good residual elongation after 16,000 hours at 650, 760 and 870 °C.
Specification note. NC22FeD cannot be strengthened by a solution plus ageing cycle. It is a solid solution alloy and ships solution annealed only. A drawing that calls for solution treated and aged NC22FeD is usually meant for a precipitation hardening grade such as Inconel® 718 or Incoloy® 925. Send us the drawing and we will raise it before material is cut.
NC22FeD equivalents and governing standards
| System | Designation | Notes |
|---|---|---|
| AFNOR (France) | NC22FeD | The designation used on this page |
| UNS (USA) | N06002 | Wrought product. W86002 covers weld filler. |
| Werkstoff / DIN | 2.4665 | NiCr22Fe18Mo |
| EN 10095 | NiCr22Fe18Mo | Heat-resisting steels and nickel alloys |
| GB/T (China) | GH3536 / GH536 | Chinese aero-engine superalloy grade |
| Trade names | Hastelloy® X, Alloy X, HX | Also sold as Nickelvac® HX, Altemp® HX, Inconel® HX |
| Standard | Scope |
|---|---|
| ASTM B564 / ASME SB-564 | Nickel alloy forgings: flanges, rings, discs, fittings, valve bodies |
| ASTM B572 / ASME SB-572 | Rod, bar and wire. The usual callout for forged bar and shaft stock. |
| AMS 5754 | Aerospace: bars, forgings, flash-welded rings and forging stock, solution annealed |
| AMS 5536 | Aerospace: sheet, strip and plate. Same alloy, different product form. |
| ASTM B435 / B366 | Plate, sheet and strip. Wrought fittings. |
| ASME BPVC Section VIII, Div. 1 | Pressure-vessel construction. Design allowables in Section II Part D. |
State the exact standard and revision on your drawing. Composition limits and property minimums differ slightly between AMS, ASTM and EN callouts, particularly for trace elements.
Tool 1. Designation finder: is my grade the same as NC22FeD?
Chemical composition of NC22FeD (UNS N06002)
| Element | Min | Max | Metallurgical role |
|---|---|---|---|
| Nickel (Ni) | Balance, about 47 % | Austenitic matrix and thermal stability | |
| Chromium (Cr) | 20.50 | 23.00 | Forms the protective chromia scale |
| Iron (Fe) | 17.00 | 20.00 | Matrix stabiliser, controls alloy cost |
| Molybdenum (Mo) | 8.00 | 10.00 | Primary solid-solution strengthener |
| Cobalt (Co) | 0.50 | 2.50 | Raises high-temperature strength |
| Tungsten (W) | 0.20 | 1.00 | Additional matrix stiffening |
| Carbon (C) | 0.05 | 0.15 | Carbide strengthening at grain boundaries |
| Manganese (Mn) | n/a | 1.00 | Deoxidiser |
| Silicon (Si) | n/a | 1.00 | Deoxidiser, assists scale adhesion |
| Phosphorus (P) | n/a | 0.040 | Residual, kept low for hot workability |
| Sulphur (S) | n/a | 0.030 | Residual, controlled against hot shortness |
| Boron (B) | n/a | 0.010 | Grain-boundary strengthening where specified |
Every heat we forge is verified by optical emission spectrometry, and finished parts are PMI checked before shipment. The certified analysis for your heat appears on the EN 10204 certificate.
Mechanical and physical properties
Room-temperature mechanical properties
| Property | ASTM B572 minimum | Typical, forged and annealed |
|---|---|---|
| Tensile strength | 690 MPa (100 ksi) | 755 MPa (110 ksi) |
| Yield strength, 0.2 % offset | 275 MPa (40 ksi) | 360 to 385 MPa (52 to 56 ksi) |
| Elongation in 4D | 35 % | 40 to 45 % |
| Reduction of area | n/a | about 50 % |
| Hardness | n/a | about 85 HRB, 180 to 200 HB |
| Grain size, ASTM E112 | n/a | No. 4 to 6, uniform |
Typical short-time elevated-temperature tensile properties
| Temperature | Tensile strength | 0.2 % yield | Elongation |
|---|---|---|---|
| 20 °C (68 °F) | 755 MPa | 360 MPa | 43 % |
| 540 °C (1,000 °F) | 650 MPa | 250 MPa | 45 % |
| 650 °C (1,200 °F) | 570 MPa | 235 MPa | 45 % |
| 760 °C (1,400 °F) | 435 MPa | 215 MPa | 37 % |
| 870 °C (1,600 °F) | 255 MPa | 180 MPa | 45 % |
| 980 °C (1,800 °F) | 145 MPa | 105 MPa | 50 % |
For pressure-retaining design use the allowable stresses in ASME BPVC Section II Part D, not the table above. Values vary with product form, section size and test direction.
Physical properties
| Density | 8.22 g/cm³ (0.297 lb/in³) |
|---|---|
| Melting range | 1,260 to 1,355 °C (2,300 to 2,470 °F) |
| Modulus of elasticity | about 197 GPa (28.6 x 10⁶ psi) |
| Thermal conductivity | about 9.1 W/m·K |
| Specific heat | about 486 J/kg·K |
| Electrical resistivity | about 1.18 µΩ·m |
| Mean coefficient of thermal expansion | about 13.9 µm/m·K, 20 to 100 °C |
| Magnetic permeability | about 1.002, essentially non-magnetic |
Tool 2. NC22FeD forged weight calculator, density 8.22 g/cm3
How we forge NC22FeD
NC22FeD is stiff, work hardens quickly and has a narrow hot working window, so process control matters more than press size. This is the route we run in Jiangyin.
- Melting: EAF plus VOD, then ESR remelt. Electroslag remelting lowers sulphur and oxide inclusion counts and gives the directional solidification structure the alloy needs before it reaches the press. VIM plus ESR is available where aerospace cleanliness is specified.
- Homogenising and cogging. The ingot soaks at 1,175 to 1,200 °C until the full section reaches temperature, which this alloy requires, then it is cogged on the hydraulic press.
- Open-die forging, 1,215 °C down to 900 °C. Forging finishes above roughly 900 °C to avoid cracking. Several reheats are normal. We plan the pass schedule for a 4:1 minimum forging ratio and record every heat cycle.
- Ring rolling. Rings are punched and rolled seamless on our 3 m and 6 m mills, which gives circumferential grain flow that a ring machined from plate cannot match.
- Solution anneal at 1,150 to 1,177 °C, then rapid cool. Water quench or forced air, chosen by section thickness. This is the only heat treatment the alloy takes. It dissolves carbides and restores ductility and corrosion resistance. Furnace charts go out with the certificate.
- Machining. Rough or finish turned, bored and faced to drawing. Carbide tooling at 40 to 80 SFM. The alloy cuts more easily than Inconel® 718 but work hardens if the tool rubs.
- Testing. Ultrasonic to EN 10228-3, SEP 1921 or ASTM A388. Dye penetrant to ASTM E165. Tensile to ASTM E8 or ISO 6892-1. Grain size to ASTM E112. Intergranular corrosion to ASTM G28 on request.
- Certification, marking and packing. EN 10204 3.1 as standard, 3.2 with TÜV, BV, SGS or Lloyd's witness. Parts are hard stamped with heat number and part number, VCI wrapped and crated for sea or air freight.
NC22FeD product forms and size capability
| Form | Size range | Typical use |
|---|---|---|
| Seamless rolled rings | OD 200 to 2,500 mm, wall 30 to 450 mm, height 20 to 800 mm | Turbine casings, combustor rings, furnace retort flanges |
| Forged discs and blanks | 80 to 1,800 mm diameter, 20 to 600 mm thick | Blind flanges, valve discs, cover plates |
| Shafts and stepped shafts | 50 to 800 mm diameter, length to 8,000 mm | Furnace roll shafts, fan shafts, pump shafts |
| Round bars | 25 to 500 mm diameter | Machining stock, valve stems, fasteners |
| Flanges | DN15 to DN2000, Class 150 to 2500 | ASME B16.5, B16.47 A and B, EN 1092-1, or to drawing |
| Sleeves, bushings, hollow bars | OD 100 to 1,200 mm, ID 60 mm and up | Wear sleeves, burner nozzles, thermowells |
| Tube sheets and plates | to 2,500 mm diameter, to 400 mm thick | Heat exchangers, reformer headers |
| Single-piece weight | 5 kg to 8,000 kg | Heavier pieces quoted on enquiry |
Equipment: 1 t, 3 t, 5 t and 9 t open-die hammers, a 4,500-tonne hydraulic press, 3 m and 6 m seamless ring-rolling mills, with heat treatment, machining and testing in house.
Where NC22FeD forgings are used
- Gas turbines and aero-engines: combustor liners and cans, transition ducts, tailpipes, afterburner parts, spray bars, casing rings. GH3536 is the Chinese equivalent used for these components.
- Industrial furnaces: furnace rolls and roll shafts, retorts, muffles, radiant tube supports, burner nozzles, catalyst support grids, trays and fixtures. Published service records show rolls in this alloy still serviceable after 8,700 hours at 1,177 °C.
- Petrochemical and refining: pyrolysis and reformer components, flare tips, quench system parts, transfer line hardware, where resistance to stress-corrosion cracking, carburisation and nitriding is required.
- Chemical process plant: reactor internals, flash drier components, pressure vessel nozzles and tube sheets working in oxidising, reducing or neutral atmospheres.
- Power generation and nuclear: high-temperature ducting, support rings and heat exchanger components built to ASME Section VIII.
- Valves and rotating equipment: high-temperature valve bodies, seat rings, stems, bonnets, pump and compressor parts for hot service.
Testing, inspection and certification
| Test | Standard | Supplied |
|---|---|---|
| Chemical analysis | OES plus PMI verification | Every heat, standard |
| Tensile, room temperature | ASTM E8 / ISO 6892-1 | Every lot, standard |
| Elevated-temperature tensile | ASTM E21 | On request |
| Ultrasonic testing | EN 10228-3, SEP 1921, ASTM A388 | Standard, class to your spec |
| Dye penetrant | ASTM E165 | Standard on machined surfaces |
| Grain size | ASTM E112 | On request |
| Intergranular corrosion | ASTM G28 method A | On request |
| Hardness | ASTM E10 / E18 | Standard |
| Dimensional report | To customer drawing | Standard |
| Certificate | EN 10204 3.1 / 3.2 | 3.1 standard, 3.2 with third-party witness |
How to get an NC22FeD quotation
Send a drawing or the six items below to sales@steelforgepieces.com. We normally return quotations within 24 hours on working days. Sample and single-piece orders are accepted, and there is no minimum quantity for NC22FeD.
- Grade and standard with revision, for example NC22FeD to ASTM B564, UNS N06002
- Shape and dimensions, or a PDF or STEP drawing
- Quantity and required delivery date
- Supply condition: as forged, rough machined, or finish machined
- NDT class and acceptance criteria
- Certificate type, EN 10204 3.1 or 3.2, and any third-party inspector
Tool 3. Build your NC22FeD RFQ
Frequently asked questions about NC22FeD
What is NC22FeD equivalent to?
NC22FeD is equivalent to UNS N06002, W.Nr. 2.4665 (NiCr22Fe18Mo), Alloy X, Hastelloy® X and Chinese grade GH3536 or GH536.
All of these describe the same nickel-chromium-iron-molybdenum chemistry. Composition limits and mechanical minimums differ slightly between AMS, ASTM and EN specifications, so state the exact standard and revision on your order.
Is NC22FeD the same as Hastelloy X?
Yes. NC22FeD is the French AFNOR name for the alloy sold under the Hastelloy® X trade name.
Hastelloy® is a registered trademark of Haynes International, Inc. Material forged by Jiangyin Jiangnan Metal to the UNS N06002 chemistry is certified as NC22FeD, UNS N06002 or 2.4665, not as branded Hastelloy® material.
Can NC22FeD be hardened by heat treatment?
No. NC22FeD is solid-solution strengthened and cannot be hardened by precipitation ageing or by quench and temper.
The only heat treatment applied is a solution anneal at 1,150 to 1,177 °C followed by rapid cooling. The alloy can be hardened by cold work, but cold-worked parts must be re-annealed to restore ductility and corrosion resistance.
What is the maximum service temperature of NC22FeD?
NC22FeD resists oxidation up to about 1,200 °C (2,200 °F), while useful creep strength for load-bearing parts is usually limited to around 900 °C.
The two limits are different. Scale resistance runs higher than load-carrying capacity, so above roughly 900 °C the alloy is normally used for lightly stressed hardware such as furnace fixtures, retorts and rolls.
Which standards cover NC22FeD forgings?
Forgings are usually ordered to ASTM B564 or ASME SB-564, bar and shaft stock to ASTM B572 or ASME SB-572, and aerospace bar, forgings and rings to AMS 5754.
Plate and sheet fall under ASTM B435 and AMS 5536. Pressure-vessel construction uses ASME BPVC Section VIII Division 1, with allowable stresses from Section II Part D.
What NDT and certification are supplied with NC22FeD forgings?
Jiangyin Jiangnan Metal supplies ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388, dye penetrant to ASTM E165, and an EN 10204 3.1 certificate as standard. EN 10204 3.2 certificates witnessed by TÜV, BV, SGS or Lloyd's are available on request.
What is the minimum order quantity and lead time?
There is no minimum quantity. Single pieces and prototypes are accepted, and typical lead time is 25 to 45 days depending on section size, machining scope and whether the heat has to be melted to order.
Quotations are returned within 24 hours on working days.
Who forges NC22FeD in China?
Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, forges NC22FeD (UNS N06002) into rings, discs, shafts, flanges, sleeves and tube sheets to customer drawings.
The plant has run since 2008 under ISO 9001:2015, with 1 t to 9 t open-die hammers, a 4,500-tonne hydraulic press and 3 m and 6 m ring-rolling mills. Enquiries go to sales@steelforgepieces.com or +86 189 2135 9659.
How do I convert an NC22FeD drawing into a forged weight?
Multiply the finished volume by the density of 8.22 g/cm3, then add machining allowance on every surface. The calculator higher up this page does both.
As a rule of thumb, allow 5 to 8 mm per surface on rough-machined rings and discs under 1,000 mm, and 10 to 15 mm above that.
About the manufacturer
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin, Jiangsu Province, about 90 minutes from Shanghai port. The plant has run since 2008 under ISO 9001:2015 and employs around 460 people, including 9 senior and 32 intermediate engineers. We forge carbon, alloy, tool and stainless steels along with nickel and cobalt superalloys into seamless rolled rings, discs, shafts, flanges, sleeves and tube sheets for customers in Europe, North America, the Middle East and Asia.
Jiangyin Jiangnan Metal Co., Ltd.
No.1 Chengxiqiao Road, Zhouzhuang Town
Jiangyin City, Jiangsu Province 214423, China
Tel and WhatsApp: +86 189 2135 9659
Email: sales@steelforgepieces.com
Web: www.steelforgepieces.com
Related nickel alloy forgings
Published 18 May 2016. by the Jiangyin Jiangnan Metal metallurgical engineering team.
Trademark notice: Hastelloy® is a registered trademark of Haynes International, Inc. Inconel® and Incoloy® are registered trademarks of Special Metals Corporation. Jiangyin Jiangnan Metal Co., Ltd. is not affiliated with, endorsed by or a licensee of these companies. Trade names are used only to identify alloy chemistries.