Hastelloy X vs Monel 400: 27% composition overlap. Significantly different materials serving different application areas.
Hastelloy X vs Monel 400
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.
Monel 400
2.4360
Nickel-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.
| Hastelloy X | Monel 400 | |
|---|---|---|
| Material Number | 2.4665 | 2.4360 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B435 | ASTM B127 |
Chemical composition (wt%)
| Element | Hastelloy X | Monel 400 | Overlap |
|---|---|---|---|
| C | 0.05–0.15% | 0–0.3% | OK |
| Si | 0–1% | 0–0.5% | OK |
| Mn | 0–1% | 0–2% | OK |
| S | — | 0–0.024% | — |
Mechanical properties
| Property | Hastelloy X | Monel 400 | Unit |
|---|---|---|---|
| tensile_strength | 690–760 | ≥ 480 | MPa |
| yield_strength | 275–345 | ≥ 170 | MPa |
| elongation | 35–45 | ≥ 35 | % |
Compatibility Assessment
Hastelloy X and Monel 400 have significantly different compositions (27% 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 Monel 400?
Hastelloy X and Monel 400 have a 27% composition overlap. They are generally not directly interchangeable.
Can I replace Hastelloy X with Monel 400?
Generally not recommended. The compositions differ significantly (27% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Hastelloy X and Monel 400?
The main differences are in the following elements: Fe. Hastelloy X is a Nickel Alloys grade, while Monel 400 is a Nickel Alloys grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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