Hastelloy X vs Inconel 601: 38% composition overlap. Significantly different materials serving different application areas.
Hastelloy X vs Inconel 601
Side-by-side chemical composition and mechanical property comparison.
Overview
Hastelloy X
2.4665
Nickel-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.
Inconel 601
2.4851
Nickel-chromium-iron alloy with aluminum for outstanding high-temperature oxidation resistance up to 1200°C. The Al forms a protective oxide scale resistant to spalling under cyclic thermal conditions. Better oxidation resistance than Inconel 600 (which lacks Al). Used for furnace hardware (baskets, trays, fixtures), radiant tubes, thermocouple protection tubes, catalyst support grids, and thermal reactors in automotive exhaust systems.
| Hastelloy X | Inconel 601 | |
|---|---|---|
| Material Number | 2.4665 | 2.4851 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B435 | EN 10095 |
Chemical composition (wt%)
| Element | Hastelloy X | Inconel 601 | Overlap |
|---|---|---|---|
| C | 0.05–0.15% | 0–0.1% | Partial |
| Si | 0–1% | 0–0.5% | OK |
| Mn | 0–1% | 0–1% | OK |
| S | — | 0–0.015% | — |
Mechanical properties
| Property | Hastelloy X | Inconel 601 | Unit |
|---|---|---|---|
| tensile_strength | 690–760 | 550–750 | MPa |
| yield_strength | 275–345 | 205–310 | MPa |
| elongation | 35–45 | 30–50 | % |
Compatibility Assessment
Hastelloy X and Inconel 601 have significantly different compositions (38% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Hastelloy X the same as Inconel 601?
Hastelloy X and Inconel 601 have a 38% composition overlap. They are generally not directly interchangeable.
Can I replace Hastelloy X with Inconel 601?
Generally not recommended. The compositions differ significantly (38% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Hastelloy X and Inconel 601?
The main differences are in the following elements: C, Cr. Hastelloy X is a Nickel Alloys grade, while Inconel 601 is a Nickel Alloys grade.
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