Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
NiCr23Fe is a nickel–chromium–iron solid-solution alloy distinguished from Alloy 600 by a deliberate aluminium addition (1.0–1.7%), which gives it outstanding resistance to high-temperature oxidation and excellent resistance to other forms of high-temperature corrosion, including carburisation and nitriding. The aluminium promotes a tightly adherent oxide scale that resists spalling even under severe thermal cycling. This datasheet presents the material within the European (DIN / EN / Werkstoff-Nummer) standard system.
The alloy retains high mechanical strength and good ductility at elevated temperature and is widely used in thermal-processing, petrochemical, power-generation, and aerospace applications. Like Alloy 600, it is not strengthened by aging — properties derive from solid-solution hardening, with additional strength available only through cold work. It resists oxidation up to approximately 1250 °C and is suitable for continuous high-temperature service where ordinary stainless steels and Alloy 800H/HT are inadequate.
Note: the alloy is not recommended for strongly reducing, sulphur-bearing environments at red heat, owing to its high nickel content.
Values per published manufacturer data (Special Metals / Ulbrich / Elgiloy) for INCONEL alloy 601, annealed condition.
| Property | Value | Unit |
|---|---|---|
| Density | 8.11 | g/cm³ |
| Melting range (solidus–liquidus) | 1360–1411 | °C |
| Elastic modulus (20 °C) | 207 | GPa |
| Modulus of rigidity (20 °C) | 81.2 | GPa |
| Thermal conductivity (20 °C) | 11.2 | W/m·K |
| Coefficient of thermal expansion (20–100 °C) | 13.75 | µm/m·°C |
| Specific heat capacity (20 °C) | 448 | J/kg·K |
| Electrical resistivity (20 °C) | 1.18 | µΩ·m |
| Magnetic permeability | ~1.01 | Essentially non-magnetic |
| Maximum oxidation-resistant temperature | ~1250 | °C |
| Cryogenic service capability | Down to –196 | °C |
Composition per EN 10095 (W.Nr. 2.4851, NiCr23Fe).
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel | Ni | 58.0 | 63.0 | Austenitic FCC matrix; SCC resistance |
| Chromium | Cr | 21.0 | 25.0 | Oxidation resistance |
| Iron | Fe | — | 18.0 | Balance element |
| Aluminium | Al | 1.0 | 1.7 | Oxidation resistance (adherent scale) |
| Carbon | C | 0.03 | 0.10 | Carbide formation |
| Manganese | Mn | — | 1.0 | Deoxidiser |
| Silicon | Si | — | 0.5 | Deoxidiser |
| Copper | Cu | — | 0.5 | Residual |
| Titanium | Ti | — | 0.5 | Residual |
| Boron | B | — | 0.006 | Trace |
| Phosphorus | P | — | 0.02 | Residual impurity |
| Sulphur | S | — | 0.015 | Residual impurity |
Nominal: Ni-23Cr-Fe-1.4Al. The aluminium addition (1.0-1.7%) provides the adherent oxide scale. Maximum application temperature in air ~1200 °C.
Solution-annealed (+AT) condition, per EN 10095 for W.Nr. 2.4851.
| Property | Value | Unit |
|---|---|---|
| Tensile strength (Rm) | 550–750 | MPa |
| 0.2% proof strength (Rp0.2) | ≥205 | MPa |
| Elongation at fracture (A) | ≥30 | % |
| Brinell hardness | ≤220 | HB |
Values per EN 10095; not precipitation-hardenable. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation (air) | Outstanding | Al-bearing scale resists spalling to ~1250 °C, even under thermal cycling |
| Cyclic oxidation | Outstanding | Superior to Alloy 600 due to aluminium addition |
| Carburisation | Excellent | High Ni + Cr resists carbon pickup |
| Nitriding atmospheres | Very Good | Improved nitriding resistance vs Alloy 600 |
| Aqueous corrosion | Good | Good resistance in many water environments |
| Chloride stress-corrosion cracking | Good | High Ni content provides useful resistance |
| Reducing, sulphur-bearing environments (red heat) | Poor | Not recommended; high Ni forms low-melting Ni-S eutectic |
| Carbon dioxide / combustion gases | Good | Suitable for many furnace atmospheres |
The alloy is a solid-solution material and is NOT precipitation-hardenable. Heat treatment is used for annealing, solution treatment, and stress relief only. Strength is increased by cold work.
Solution Treatment Temperature: 1100–1200 °C, followed by rapid cooling (water quench or rapid air cool) Purpose: Maximum rupture/creep strength for high-temperature service above 540 °C.
Anneal Temperature: ~1090–1150 °C Purpose: Maximum tensile properties for service below 540 °C; recrystallises grain structure.
Hot working: 870–1230 °C; large deformations at 1040–1230 °C. Avoid working in the 650–870 °C range (low ductility).
Good weldability by conventional processes. As a solid-solution alloy, it is not subject to strain-age cracking. Owing to lower thermal conductivity and higher thermal expansion than carbon steel, use wider root gaps and larger included angles.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Excellent | ERNiCrFe-11 / matching 601 filler |
| GMAW / MIG | Good | ERNiCrFe-11 |
| SMAW / stick | Good | ENiCrFe-type electrode |
| SAW / submerged arc | Suitable | matching filler + flux |
Post-weld heat treatment is generally not required for general service.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability group | Group C (similar to austenitic stainless steel) |
| Preferred condition | Cold-drawn, or cold-drawn and stress-relieved |
| Tooling | Heavy-duty tools; work-hardens during machining |
| Coolant | Flood coolant recommended |
Forming Processes
| Process | Notes |
|---|---|
| Hot forming | 870–1230 °C; large deformations at 1040–1230 °C; avoid 650–870 °C |
| Cold forming | Readily formed by conventional methods; heavy-duty lubricants |
| Annealing between operations | Recommended for heavy cold reductions |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Thermal processing | Radiant tubes, muffles, retorts, furnace fixtures, mesh belts, baskets | Cyclic oxidation resistance to ~1250 °C |
| Aerospace | Combustion can-liners, jet engine igniters, gas turbine components | High-temperature strength + oxidation resistance |
| Chemical / petrochemical | Catalyst support grids (nitric acid), thermocouple protection tubes | Oxidation and carburisation resistance |
| Power generation | Steam superheater tube supports, high-temperature ducting | Strength and oxidation resistance at elevated temperature |
| Pollution control | Components for high-temperature gas handling | Cyclic oxidation resistance |
| Product Form | EN / DIN Standard | VdTÜV | Condition |
|---|---|---|---|
| Plate, sheet and strip | DIN 17750 · EN 10095 | VdTÜV-Wb 304 | Hot/cold rolled, heat treated, pickled |
| Bar and rod | DIN 17752 | VdTÜV-Wb 304 | Rolled or forged, heat treated |
| Seamless tube | DIN 17751 | VdTÜV-Wb 304 | Heat treated |
| Wire | DIN 17753 | — | Rolled and drawn |
| Forgings | DIN 17754 | VdTÜV-Wb 304 | Heat treated |
| Welding consumables | EN ISO 18274 matching filler | — | Rod, wire, electrode |
| EN Symbol | Ni % | Cr % | Fe % | Mo % | UTS (annealed) | Max Temp. | Best Used For |
|---|---|---|---|---|---|---|---|
| NiCr23Fe | 58–63 | 21–25 | balance | — | ≥550 MPa | ~1250 °C | Cyclic high-temp oxidation; radiant tubes |
| NiCr15Fe | ≥72 | 14–17 | 6–10 | — | ~655 MPa | ~1095 °C | General high-temp; carburisation/nitriding |
| NiCr22Mo9Nb | ≥58 | 20–23 | ≤5 | 8–10 | ~830 MPa | ~980 °C | Universal corrosion resistance; seawater |
| NiCr29Fe | ≥58 | 27–31 | 7–11 | — | ~690 MPa | ~1000 °C | Nuclear SCC resistance; high-Cr oxidation |
| NiCr19Fe19Nb5Mo3 | 50–55 | 17–21 | balance | 2.8–3.3 | ~1380 MPa (aged) | ~650 °C | High-strength weldable structures |
021-33556635
13371897780
651280525@qq.com
No. 600, Si Chuang Road, Songjiang District, Shanghai
