Hastelloy Alloys
Hastelloy X (UNS N06002) — Composition, Properties & Supply
Hastelloy X (UNS N06002) is a solid-solution Ni-Cr-Fe-Mo superalloy combining oxidation resistance to 1200 °C with useful high-temperature strength. It resists combustion-gas corrosion and thermal fatigue, making it a classic material for aero-engine combustors, afterburners and industrial furnaces.
What is the chemical composition of Hastelloy X?
| Element | Symbol | Content (wt%) |
|---|---|---|
| Ni | Ni | Balance |
| Cr | Cr | 20.5–23.0 |
| Fe | Fe | 17.0–20.0 |
| Mo | Mo | 8.0–10.0 |
| Co | Co | 0.50–2.50 |
| W | W | 0.20–1.00 |
| C | C | 0.05–0.15 |
| Si | Si | ≤ 1.00 |
| Mn | Mn | ≤ 1.00 |
| B | B | ≤ 0.008 |
Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.
What are the mechanical properties of Hastelloy X?
| Property | Value | Note |
|---|---|---|
| Tensile strength | ≥ 655 MPa | Room temperature |
| Yield strength (0.2% offset) | ≥ 240 MPa | Room temperature |
| Elongation | ≥ 35 % | Gauge length 50 mm / 4D |
| Hardness | ≤ 200 HB | Brinell / Rockwell |
What are the physical properties of Hastelloy X?
| Property | Value |
|---|---|
| Density | 8.22 g/cm³ |
| Melting range | 1260–1355 °C |
| Thermal conductivity | 9.1 W/m·K |
| Elastic modulus | 205 GPa |
| Maximum service temperature | 1200 °C |
What are the key characteristics of Hastelloy X?
- Oxidation resistance to 1200 °C plus carburisation and nitriding resistance
- Outstanding combustion-gas corrosion and thermal fatigue resistance
- Balanced high-temperature strength and formability
- Good weldability with ERNiCrMo-2 filler
Where is Hastelloy X used?
- Aero-engine combustors, afterburners and tailpipes
- Industrial gas turbine transition ducts and flame tubes
- Industrial furnace rollers, radiant tubes and muffles
- Reformer and cracking furnace components
- Heat-treat fixtures and baskets
Which standards and specifications cover Hastelloy X?
What product forms are available?
Frequently asked questions
How does Hastelloy X differ from Inconel 601?
Both resist high-temperature oxidation, but X carries 8–10% molybdenum and 17–20% iron, giving markedly better hot strength and combustion-gas corrosion resistance plus oxidation resistance to 1200 °C. 601 costs less and is more cost-effective for furnace parts in clean air without combustion-gas attack.
Need Hastelloy X bar, tube, plate or forgings?
Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.
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