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
N06600 is an austenitic nickel–chromium–iron solid-solution alloy known for its excellent resistance to high-temperature oxidation, carburisation, and nitriding. Its high nickel content (minimum 72%) provides outstanding resistance to chloride-ion stress-corrosion cracking and to reducing and alkaline conditions, while the chromium content delivers resistance to oxidising environments and sulphur compounds. This datasheet presents the material within the American (ASTM / SAE-AMS / UNS) standard system.
The alloy is designed for service from cryogenic temperatures up to approximately 1095 °C (2000 °F). It is not strengthened by aging — its properties derive from solid-solution hardening, with additional strength available through cold working. The result is an alloy that combines moderate strength with excellent ductility, toughness, formability, and weldability. It is non-magnetic in the annealed condition and does not undergo a ductile-to-brittle transition at low temperature.
Note that the alloy contains no molybdenum, so unlike a Ni-Cr-Mo grade such as Inconel 625 / 2.4856 it offers only limited resistance to pitting in stagnant seawater. Where high chloride pitting resistance is required, a molybdenum-bearing grade is preferred.
| Property | Value | Unit |
|---|---|---|
| Density | 8.47 | g/cm³ |
| Melting range (solidus–liquidus) | 1354–1413 | °C |
| Thermal conductivity (20 °C) | 14.9 | W/m·K |
| Coefficient of thermal expansion (20–100 °C) | 13.3 | µm/m·°C |
| Specific heat capacity (20 °C) | 444 | J/kg·K |
| Electrical resistivity (20 °C) | 1.03 | µΩ·m |
| Magnetic permeability (at 200 Oe) | 1.01 | Essentially non-magnetic |
| Curie temperature | –194 | °C |
| Elastic modulus (20 °C, typical) | ~207 | GPa |
| Maximum service temperature (continuous) | ~1095 | °C |
| Cryogenic service capability | Down to –196 | °C |
Specified per ASTM B166 / B168, AMS 5540 / 5665.
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel + Cobalt | Ni+Co | 72.0 | — | Base element; austenitic FCC matrix; resistance to chloride SCC, reducing and alkaline media; ductility |
| Chromium | Cr | 14.0 | 17.0 | Forms Cr₂O₃ passive film; oxidation resistance; resistance to sulphur compounds |
| Iron | Fe | 6.0 | 10.0 | Matrix constituent; balances cost and properties |
| Carbon | C | — | 0.15 | Strength via carbides; controlled to manage grain boundary behaviour |
| Manganese | Mn | — | 1.00 | Deoxidiser |
| Silicon | Si | — | 0.50 | Deoxidiser |
| Copper | Cu | — | 0.50 | Residual; controlled |
| Sulphur | S | — | 0.015 | Residual impurity; controlled |
Annealed condition. Room-temperature values per Special Metals official datasheet; elevated-temperature values measured at 550 °C.
| Property | Room Temperature | At 550 °C | Source |
|---|---|---|---|
| Ultimate tensile strength | 655 MPa (95 ksi) | 550 MPa (79.8 ksi) | Special Metals datasheet |
| 0.2% proof strength (yield) | 310 MPa (45 ksi) | 180 MPa (26.1 ksi) | Special Metals datasheet |
| Elongation at break | 45 % | 42 % | Special Metals datasheet |
| Hardness | ≤200 HB (typical, annealed) | — | Typical industry value |
| Tensile strength (heavily cold-worked) | up to ~1380 MPa | — | Typical industry value |
| Impact toughness | Excellent; no ductile-brittle transition | — | Curie temperature –194 °C |
Note: ASTM B166 minimum specification values are UTS ≥550 MPa and yield ≥240 MPa; the values above are typical annealed properties from the manufacturer and are not for specification purposes. Confirm against the mill test certificate for each delivery.
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation (air) | Excellent | Stable to ~1095 °C; protective Cr₂O₃ scale |
| Carburisation | Excellent | High Ni resists carbon pickup in carburising atmospheres |
| Nitriding atmospheres | Excellent | Widely used for nitriding retorts and containers |
| Chloride stress-corrosion cracking (SCC) | Excellent | High Ni content provides immunity in most chloride service |
| Reducing conditions | Very Good | High Ni stable in reducing media |
| Hot alkalis (caustic) | Excellent | Resists hot caustic soda and many acid salts |
| Organic acids | Moderate | Suitable for many organic acid duties |
| Dry chlorine / hydrogen chloride | Good | Little or no attack at room and elevated temperature in dry gas |
| Seawater pitting (stagnant) | Limited | No Mo; can pit in still seawater — use a Mo-bearing grade |
| Nitric acid (HNO₃) | Poor | Not recommended for nitric acid service |
| High-temperature sulfidation | Poor | Not suitable for parts most exposed to hot sulphidising corrosion |
The alloy is a solid-solution material and is NOT precipitation-hardenable. Heat treatment is used for annealing, stress relief, and grain-size control only. Strength is increased by cold working rather than by aging.
Mill / Solution Anneal Temperature: 980–1095 °C Cooling: Air cool or quench Purpose: Softens material, dissolves carbides, recrystallises grain structure for formability.
Stress Relief / Stabilise Anneal Temperature: ~870–980 °C Purpose: Relieves residual stress after cold work; stabilises carbides for service involving intergranular corrosion risk.
Good weldability by most conventional processes. As a solid-solution alloy, it is not subject to strain-age cracking.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Excellent | AWS A5.14 ERNiCr-3 (Filler Metal 82) |
| GMAW / MIG | Good | AWS A5.14 ERNiCr-3 (Filler Metal 82) |
| SMAW / stick | Good | AWS A5.11 ENiCrFe-3 (Electrode 182) |
| SAW / submerged arc | Suitable | AWS A5.14 ERNiCr-3 (Filler Metal 82) + matching flux |
Post-weld heat treatment is generally not required for general service.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Turning speed (carbide tooling) | 20–45 m/min |
| Tool material | Coated carbide; HSS for light cuts |
| Coolant | Flood coolant recommended |
| Work hardening behaviour | Work-hardens; use positive rake, rigid setup, avoid dwell |
| Machining condition | Machine in annealed condition |
Forming Processes
| Process | Notes |
|---|---|
| Hot forming | 870–1230 °C; cool rapidly through carbide range for corrosion service |
| Cold forming | Excellent ductility; readily deep-drawn, spun, and bent |
| Annealing between operations | Recommended for heavy cold reductions |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Heat treatment / metal processing | Furnace muffles, retorts, baskets, trays, nitriding containers | Oxidation, carburisation and nitriding resistance |
| Aerospace | Exhaust liners, turbine seals, combustion components | High-temperature stability, formability |
| Chemical and petrochemical | Heaters, evaporator tubes, stills, fittings for acids and sulphides | Resistance to reducing media, chlorides, caustics |
| Nuclear | Reactor components, steam generator parts (early designs) | Chloride SCC resistance, high-purity water service |
| Food processing | Process vessels and equipment | Corrosion resistance, cleanliness |
| Power generation | Heat exchanger components, high-temperature tubing | High-temperature oxidation resistance |
| Product Form | ASTM Standard | ASME Code | AMS Standard |
|---|---|---|---|
| Plate, sheet and strip | ASTM B168 | ASME SB-168 | AMS 5540 |
| Bar and rod | ASTM B166 | ASME SB-166 | AMS 5665 |
| Seamless pipe and tube | ASTM B167 | ASME SB-167 | — |
| Welded tube | ASTM B516 / B517 | ASME SB-516 / SB-517 | — |
| Forgings | ASTM B564 | ASME SB-564 | — |
| Wire | — | — | AMS 5687 |
| Welding consumables | AWS A5.14 ERNiCr-3 · A5.11 ENiCrFe-3 | — | — |
| UNS | Ni % | Cr % | Fe % | Mo % | UTS (annealed) | Max Temp. | Best Used For |
|---|---|---|---|---|---|---|---|
| N06600 | ≥72 | 14–17 | 6–10 | — | ~655 MPa | ~1095 °C | High-temp oxidation, carburisation, nitriding |
| N06601 | 58–63 | 21–25 | balance | — | ~740 MPa | ~1200 °C | Higher oxidation resistance via added Al |
| N06625 | ≥58 | 20–23 | ≤5 | 8–10 | ~830 MPa | ~980 °C | Universal corrosion resistance; seawater |
| N06690 | ≥58 | 27–31 | 7–11 | — | ~690 MPa | ~1000 °C | Nuclear SCC resistance; high-Cr oxidation |
| N07718 | 50–55 | 17–21 | balance | 2.8–3.3 | ~1380 MPa (aged) | ~650 °C | High-strength weldable structures |
| S30400 | 8–10 | 18–20 | balance | — | ~515 MPa | ~870 °C | General purpose; lower temperature ceiling |
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