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
N06230 is a nickel–chromium–tungsten–molybdenum alloy with a small lanthanum addition, combining excellent high-temperature strength, outstanding oxidation resistance and exceptional long-term thermal stability. This datasheet presents the material within the American (ASTM / ASME / SAE-AMS / UNS) standard system.
The nickel base with ~22% chromium and a lanthanum micro-addition gives outstanding resistance to oxidising environments for prolonged exposure to about 1149 °C (2100 °F), together with premier resistance to nitriding atmospheres. Tungsten (~14%) and molybdenum (~2%) provide solid-solution strengthening, while the alloy also offers lower thermal expansion than most high-temperature alloys and a pronounced resistance to grain coarsening with prolonged high-temperature exposure. A key attribute is its long-term stability: it does not form embrittling sigma or mu phases even after 16,000 hours of exposure between 649 and 870 °C, retaining excellent ductility.
It is readily fabricated, formed, welded and castable. It may be forged or hot-worked from ~1177 °C (2150 °F), and is readily cold-formed owing to its good ductility. Typical applications include gas-turbine combustion hardware and transition ducts, petrochemical and thermal-processing equipment, nitric-acid production, and other components requiring a balance of strength, oxidation/nitridation resistance and stability.
Values per manufacturer (Haynes / Ulbrich) data, solution-annealed condition.
| Property | Value | Unit |
|---|---|---|
| Density | 8.97 | g/cm³ |
| Melting range | 1301–1371 | °C |
| Young's modulus (20 °C) | 211 | GPa |
| Specific heat capacity (21 °C) | 397 | J/kg·K |
| Thermal conductivity (20 °C) | 8.9 | W/m·K |
| Coefficient of thermal expansion (20–100 °C) | 12.7 | µm/m·°C |
| Electrical resistivity (20 °C) | 1.25 | µΩ·m |
| Maximum oxidation-resistance temperature | ~1149 | °C |
| Structure | Austenitic (FCC) | — |
Limiting composition per ASTM B435 (UNS N06230).
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel | Ni | Balance (47–65) | — | Base element; FCC matrix |
| Chromium | Cr | 20.0 | 24.0 | Oxidation + corrosion resistance |
| Tungsten | W | 13.0 | 15.0 | Solid-solution strengthening |
| Molybdenum | Mo | 1.0 | 3.0 | Solid-solution strengthening |
| Cobalt | Co | — | 5.0 | Residual |
| Iron | Fe | — | 3.0 | Residual |
| Manganese | Mn | 0.30 | 1.0 | Deoxidiser; controls sulphur |
| Silicon | Si | 0.25 | 0.75 | Deoxidiser |
| Aluminium | Al | 0.20 | 0.50 | Oxidation resistance |
| Carbon | C | 0.05 | 0.15 | Carbide strengthening |
| Lanthanum | La | 0.005 | 0.050 | Oxide-scale adhesion (key micro-addition) |
| Boron | B | — | 0.015 | Grain-boundary strengthening |
Key feature: the lanthanum micro-addition improves oxide-scale adhesion, contributing to oxidation resistance to ~1149 °C and excellent thermal stability.
Typical room-temperature properties, solution-annealed condition.
| Property | Value | Source |
|---|---|---|
| Ultimate tensile strength | ≥760 MPa (110 ksi) | Solution-annealed (ASTM/Ulbrich min) |
| 0.2% proof strength (yield) | ≥310 MPa (45 ksi) | Solution-annealed |
| Elongation at break | ≥40 % | Solution-annealed |
| Hardness | ~90–95 HRB | Solution-annealed |
The alloy can be cold-rolled to various tempers for higher strength. Its outstanding thermal stability means it does not form sigma/mu phases even after very long mid-temperature exposure, retaining ductility. Values are typical or specified minima; confirm against the mill test certificate.
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation | Outstanding | To ~1149 °C (2100 °F) prolonged; La-stabilised scale |
| Nitriding atmospheres | Premier | A key advantage of alloy 230 |
| Long-term thermal stability | Outstanding | No sigma/mu phase after 16,000 h at 649–870 °C |
| Thermal cycling | Excellent | Low expansion; scale adhesion |
| Grain coarsening | Resistant | Stable grain size at high temperature |
| High-temperature strength / creep | Excellent | W + Mo solid-solution + carbides |
| Carburisation | Good | Typical of high-Ni-Cr |
A solid-solution nickel-base alloy; strengthened by solid solution, carbides and cold work. Heat treatment is solution annealing.
Solution Anneal Temperature: ~1177–1232 °C (2150–2250 °F), followed by rapid cooling Purpose: dissolves carbides, restores ductility and develops optimum properties.
Hot or cold worked parts are annealed and cooled rapidly to ensure the best balance of properties. Hot working is carried out from ~1177 °C (2150 °F). Owing to its thermal stability, the alloy resists embrittlement during service.
Excellent welding and forming characteristics; welding behaviour is similar to Hastelloy X. Joined by gas-tungsten-arc (GTAW), gas-metal-arc (GMAW), shielded-metal-arc (SMAW) and resistance welding, using matching filler. The alloy is also castable.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG · GMAW / MIG | Excellent | AWS A5.14 ERNiCrWMo-1 (matching 230 filler) |
| SMAW / stick | Good | AWS A5.11 ENiCrWMo-1 |
| Resistance welding | Good | — |
Use matching-composition filler. Anneal and rapidly cool fabricated parts for the best balance of properties.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Work hardening | Moderate-to-high; rigid setup, sharp tooling, positive rake |
| Cutting | Low-to-moderate speed, ample feed; flood coolant |
| Preferred condition | Solution-annealed |
Forming Processes
| Process | Notes |
|---|---|
| Hot working | From ~1177 °C (2150 °F) |
| Cold forming | Readily cold-formed (good ductility); cold-rollable to tempers |
| Casting | Castable by air-melt sand or vacuum methods |
| Solution anneal | ~1177–1232 °C, rapid cool, after forming |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Gas turbines | Combustion cans, transition ducts, hot-section hardware | Oxidation to 1149 °C + strength + stability |
| Petrochemical | Catalyst-grid supports, reformer/cracking hardware | Nitridation + thermal stability |
| Thermal processing | Furnace internals, fixtures, retorts | Oxidation + grain-coarsening resistance |
| Nitric-acid production | High-temperature process hardware | Nitriding-environment resistance |
| Aerospace | High-temperature ducting and structures | Strength + low expansion |
| Power / energy | High-temperature structural components | Long-term thermal stability |
| Product Form | ASTM Standard | ASME Code | AMS |
|---|---|---|---|
| Sheet, strip and plate | ASTM B435 | ASME SB-435 | AMS 5878 |
| Bar and rod | ASTM B572 | ASME SB-572 | AMS 5891 |
| Forgings | ASTM B564 | ASME SB-564 | AMS 5891 |
| Seamless pipe and tube | ASTM B622 | ASME SB-622 | — |
| Welded pipe / tube | ASTM B619 / B626 | ASME SB-619 / SB-626 | — |
| Fittings | ASTM B366 | ASME SB-366 | — |
| Welding consumables | AWS A5.14 ERNiCrWMo-1 · AWS A5.11 ENiCrWMo-1 | — | AMS 5839 |
Nickel-base high-temperature alloy. UNS N06230. ASME Boiler Code approved (e.g. Section I to 899 °C). GE B50TF246.
| UNS | Ni/Co | Cr % | Other | Best Used For |
|---|---|---|---|---|
| N06230 | Ni bal | 20–24 | W 14, Mo 2, La | Oxidation to 1149°C + nitriding + stability |
| R30188 | Co bal | 20–24 | W 14, Ni 22, La | Cobalt-base; oxidation to 1095°C |
| R30605 | Co bal | 19–21 | W 15, Ni 10 | Cobalt-base; strongest fabricable Co alloy |
| N06002 | Ni bal | 20.5–23 | Mo 9, Fe 18 | Ni-base; combustor; oxidation to 1200°C |
| N06625 | Ni bal | 20–23 | Mo 9, Nb | Ni-base; aqueous corrosion + strength |
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