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
N06231 is a nickel-chromium-tungsten-molybdenum filler metal for welding high-temperature alloys. This datasheet presents the material within the American (ASTM / ASME / AWS / UNS) standard system.
The companion filler metal to Haynes 230 alloy, N06231 is used for the gas-tungsten-arc and gas-metal-arc welding of 230 alloy and may also be used to weld alloy 617 and thick-section cobalt alloys such as Haynes 188. The deposited weld metal combines excellent high-temperature strength and oxidation resistance with superior long-term thermal stability and good fabricability. Tungsten is the primary solid-solution strengthener — the reason 230 outperforms many alloys above 871 °C — while a small lanthanum addition improves oxide-scale adhesion during thermal cycling and the carbon forms stable M₆C and M₂₃C₆ carbides that resist grain coarsening. It is supplied as filler wire (AWS A5.14 ERNiCrWMo-1).
Typical applications include filler metal for welding gas-turbine combustion-zone components — combustor cans, transition ducts and flame holders — and other high-temperature 230, 617 and cobalt-alloy assemblies in aerospace and power generation.
| Property | Value | Unit |
|---|---|---|
| Density | 8.97 | g/cm³ |
| Melting range | 1301–1371 | °C |
| Elastic modulus | 211 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 12.7 | µm/m·°C |
| Thermal conductivity (20 °C) | 8.9 | W/m·K |
| Specific heat (20 °C) | 397 | J/kg·K |
| Structure | Austenitic (FCC), single phase | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel | Ni | Balance | — | Base element |
| Chromium | Cr | 20.0 | 24.0 | Oxidation resistance |
| Tungsten | W | 13.0 | 15.0 | Primary solid-solution strengthening |
| Molybdenum | Mo | 1.0 | 3.0 | High-temperature strength |
| Iron | Fe | — | 3.0 | Residual |
| Cobalt | Co | — | 5.0 | Residual |
| Manganese | Mn | 0.30 | 1.00 | Deoxidiser |
| Silicon | Si | 0.25 | 0.75 | Oxidation resistance |
| Aluminium | Al | 0.20 | 0.50 | Oxidation resistance |
| Lanthanum | La | 0.005 | 0.05 | Oxide-scale adhesion |
| Carbon | C | 0.05 | 0.15 | M₆C / M₂₃C₆ carbide formation |
All-weld-metal condition, typical values for UNS N06231.
| Condition | Property | Value |
|---|---|---|
| All-weld-metal | Tensile strength (UTS) | ≥760 MPa (110 ksi) |
| All-weld-metal | 0.2% yield strength | ≥310 MPa (45 ksi) |
| All-weld-metal | Elongation at break | ≥40 % |
| At elevated temperature | High-temperature strength | Retained; tungsten-strengthened |
| — | Elastic modulus | 211 GPa |
Confirm against the mill / weld test report. As a filler metal, the value lies in the high-temperature strength and stability of the deposited weld metal.
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation (to ~1149 °C) | Excellent | Lanthanum-stabilised chromia scale |
| Nitriding environments | Excellent | Matches 230 base alloy |
| Long-term thermal stability | Excellent | Carbide-stabilised structure |
| Carburisation | Very Good | High chromium |
| Weld-joint high-temperature service | Excellent | Strength + oxidation resistance |
The deposited weld metal reproduces the high-temperature oxidation resistance, nitriding resistance and long-term thermal stability of 230 base alloy, with the tungsten providing high-temperature strength and the lanthanum improving oxide-scale adhesion during thermal cycling.
A single-phase solid-solution alloy; not hardenable by precipitation. Welded assemblies are used as-welded or solution annealed.
Solution Anneal Where base-metal solution annealing is required, solution anneal at approximately 1175–1245 °C (2150–2275 °F) and rapidly cool. The filler metal itself is not strengthened by heat treatment; weld-metal properties derive from its solid-solution and carbide structure.
This alloy is itself a filler metal — its primary purpose. Used for gas-tungsten-arc and gas-metal-arc welding of 230 alloy, alloy 617 and thick-section cobalt alloys such as Haynes 188. Clean surfaces are essential; base metal is preferably welded in the solution-annealed condition.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Excellent | 230-W filler (ERNiCrWMo-1) |
| GMAW / MIG | Excellent | 230-W filler (ERNiCrWMo-1) |
| As filler metal | Primary use | 230, 617 and cobalt-alloy joints |
The alloy is itself the filler metal (AWS A5.14 ERNiCrWMo-1, ASME SFA-5.14); weld with clean surfaces and appropriate procedures.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Form | Supplied as wire (spools, cut lengths, reels, coils) |
| Feeding | RTW™ surface promotes smooth feeding |
| Coolant | Per base-metal machining practice |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Supplied as drawn filler wire |
| Hot forming | Per base-metal practice; solution anneal afterward |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Aero gas turbine | Combustor cans, transition ducts, flame holders | High-temperature strength + oxidation |
| Power generation | High-temperature welded assemblies | Long-term thermal stability |
| Welding | Filler for 230, 617, cobalt alloys | Sound high-temperature joints |
| Process | High-temperature ducting and hardware | Oxidation + nitriding resistance |
| Product Form | Standard | Notes |
|---|---|---|
| TIG cut lengths | AWS A5.14 ERNiCrWMo-1 | ASME SFA-5.14 |
| MIG spools | AWS A5.14 ERNiCrWMo-1 | AMS 5839 |
| Reels and coils | UNS N06231 | RTW™ finish |
| Material designation | UNS N06231 | Companion to 230 (N06230) |
Nickel-chromium-tungsten-molybdenum filler metal. UNS N06231.
| UNS | Cr % | W % | Mo % | Best Used For |
|---|---|---|---|---|
| N06231 | 20–24 | 13–15 | 1–3 | Filler metal for 230, 617 and cobalt alloys; high-temp joints |
| N06230 | 20–24 | 13–15 | 1–3 | Base alloy (230); high-temp strength + oxidation |
| N06617 | 20–24 | — | 8–10 | High-temperature Ni-Cr-Co-Mo structural alloy (617) |
| N06002 | 20.5–23 | 0.2–1 | 8–10 | Gas-turbine combustors, furnace parts (X) |
| R30188 | 20–24 | 13–16 | — | Cobalt-base high-temperature alloy (188) |
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