Hastelloy X
2.4665Nickel-chromium-iron-molybdenum solid-solution superalloy — exceptional combination of oxidation resistance, fabricability, and high-temperature strength. NOT age-hardenable (solid-solution only). Oxidation-resistant to 1200°C, good ductility after 16000h at 650-870°C. Outstanding formability and weldability for a superalloy. Used for gas turbine combustor cans, transition ducts, afterburners, furnace hardware, and petrochemical process equipment.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS N06002 | N06002 | REF |
| 🇪🇺 | EN | Europe | NiCr22Fe18Mo / 2.4665 | 2.4665 | 100% |
| 🇺🇸 | AMS | USA | AMS 5536 (sheet) / AMS 5754 (bar) | — | 100% |
Sources: ASTM B435, DIN 17744, AMS 5536
Mechanical properties
Compatibility verdict
Hastelloy X and NiCr22Fe18Mo / 2.4665: 100% composition match
Related materials
Inconel 625
2.4856Nickel-chromium-molybdenum-niobium superalloy. Solid-solution strengthened (no precipitation hardening required). Outstanding corrosion resistance from cryogenic to 982°C. Used for jet engine exhaust systems, marine components, chemical processing, flare stacks, and nuclear applications.
Hastelloy C-276
2.4819The most versatile corrosion-resistant alloy available. Ni-Mo-Cr-W composition resists both oxidizing and reducing environments. Outstanding resistance to pitting, stress corrosion cracking, and wet chlorine gas. Used in chemical processing, flue gas desulfurization, pulp & paper, and waste treatment.
Monel 400
2.4360Nickel-copper alloy with excellent resistance to seawater, hydrofluoric acid, and alkaline environments. One of the few alloys resistant to HF acid at all concentrations. Used for marine engineering, chemical processing, oil refinery piping, and valve/pump components.
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