Hangbo Alloy Group
Shanghai · Est. 2012
UNS N06002 / W.Nr. 2.4665 — Chemical composition, mechanical properties, and corrosion resistance data for engineers and procurement professionals.
Hastelloy X (UNS N06002 / W.Nr. 2.4665) is a nickel-chromium-iron-molybdenum superalloy with exceptional oxidation resistance and high-temperature strength up to 1200°C. It combines good forming and welding characteristics with outstanding resistance to stress corrosion cracking in petrochemical applications.
The chemical composition of Hastelloy X is carefully controlled to achieve its unique combination of properties and performance characteristics.
| Element | Min % | Max % |
|---|---|---|
| Nickel (Ni) | 47.0 | Balance |
| Chromium (Cr) | 20.5 | 23.0 |
| Iron (Fe) | 17.0 | 20.0 |
| Molybdenum (Mo) | 8.0 | 10.0 |
| Cobalt (Co) | 0.50 | 2.50 |
| Tungsten (W) | 0.20 | 1.00 |
| Carbon (C) | 0.05 | 0.15 |
| Silicon (Si) | — | 1.0 |
The mechanical properties of Hastelloy X vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.
| Property | Value |
|---|---|
| Tensile Strength | 690 MPa |
| Yield Strength (0.2% offset) | 275 MPa |
| Elongation in 2 inches | 40% |
| Density | 8.22 g/cm3 |
| Melting Point | 1355 °C |
| Max Service Temperature | 1200 °C |
Excellent oxidation resistance up to 1200°C. Good resistance to carburization and nitridation. Resistant to stress corrosion cracking in petrochemical environments. The alloy forms a protective chromium oxide scale that provides long-term protection.
The unique combination of properties makes Hastelloy X suitable for a wide range of demanding applications:
Hangbo Alloy Group manufactures and supplies Hastelloy X in the following product forms, conforming to ASTM, AMS, and ASME specifications:
| Standard | Description |
|---|---|
| ASTM B435 | Plate, Sheet, and Strip |
| ASTM B619 | Welded Pipe |
| ASTM B622 | Seamless Pipe |
| ASTM B572 | Bar and Rod |
| ASTM B366 | Fittings |
| AMS 5536 | Sheet and Strip |
General references: Nickel Institute · AMPP · SAE International · ASTM International
Hastelloy X is the reference material for gas-turbine combustion cans, transition ducts and industrial furnace muffles — applications where oxidation, thermal fatigue and fabricability matter more than peak creep strength.
| Temperature | Tensile (MPa) | 0.2 % Yield (MPa) |
|---|---|---|
| 20 °C | 760 | 360 |
| 650 °C | 600 | 270 |
| 815 °C | 380 | 210 |
| 980 °C | 150 | 95 |
| Oxidation limit | continuous ≈ 1175 °C | |
Design to the creep and stress-rupture envelope for load-bearing parts; short-time tensile values overstate long-term capability above about 800 °C.
Primarily heat-resistant. It handles oxidising and reducing furnace atmospheres up to 1175 °C, and offers moderate aqueous corrosion resistance — but for wet chemical duty, a C-type alloy such as C-276 is the better choice.
Hastelloy X has better oxidation resistance and thermal fatigue behaviour above 900 °C; Inconel 625 has higher strength and far better aqueous corrosion resistance. Combustion hardware favours X; chemical process equipment favours 625.
Yes — that is one of its main advantages. It can be readily formed and welded into combustor liners and ducting, then used without post-weld heat treatment.
UNS N06002 / W.Nr. 2.4665: about 47% min nickel, 20.5-23% chromium, 17-20% iron, 8-10% molybdenum, 0.5-2.5% cobalt and 0.2-1.0% tungsten.
Tensile about 690 MPa, yield about 275 MPa and 40% elongation in the solution-annealed condition.
Excellent oxidation resistance up to about 1200 °C, making it a workhorse for gas-turbine and furnace components.
Gas-turbine combustors and afterburners, industrial furnace parts and petrochemical equipment needing stress-corrosion-cracking resistance.
Yes - it is readily formed and welded, which is one reason it is widely used for fabricated high-temperature components.
UNS N06002 / W.Nr. 2.4665, supplied to the relevant AMS and ASTM product specifications.
Hangbo Alloy Group maintains extensive inventory of Hastelloy X in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.
For quotations, material certifications, or technical consultation, contact our sales team or call +86 13611656360. We typically respond within 10 minutes.
Request a quotation for Hastelloy X round bars, tubes, plates, or custom products. We stock standard sizes and accept custom orders.