Alloy 800H / Incoloy 800H vs Monel 400: 24% composition overlap. Significantly different materials serving different application areas.
Alloy 800H / Incoloy 800H vs Monel 400
Side-by-side chemical composition and mechanical property comparison.
Overview
Alloy 800H / Incoloy 800H
1.4958
Iron-nickel-chromium alloy (Fe-32Ni-21Cr) with controlled carbon (0.05–0.10%) and grain size for optimized creep-rupture strength above 600°C. Solution-annealed: Rm ≥450 MPa, Rp0.2 ≥170 MPa, A ≥30%. Density 7.94 g/cm³, E-Modul 196 GPa. Excellent resistance to carburization, oxidation, and nitriding to 1100°C. UNS N08810, ASTM B407/B408/B409. Applications: ethylene cracking tubes, reformer furnace tubes, heat exchangers, nuclear steam generators, chemical reactors. Variant 800HT (N08811/1.4959) has tighter Al+Ti control for even higher creep strength.
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.
| Alloy 800H / Incoloy 800H | Monel 400 | |
|---|---|---|
| Material Number | 1.4958 | 2.4360 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | EN 10302 / ASTM B407 | ASTM B127 |
Chemical composition (wt%)
| Element | Alloy 800H / Incoloy 800H | Monel 400 | Overlap |
|---|---|---|---|
| C | 0.05–0.1% | 0–0.3% | OK |
| Si | ≤ 1% | 0–0.5% | OK |
| Mn | ≤ 1.5% | 0–2% | OK |
| S | — | 0–0.024% | — |
Mechanical properties
| Property | Alloy 800H / Incoloy 800H | Monel 400 | Unit |
|---|---|---|---|
| density | ≥ 7.94 | ≥ 8.8 | g/cm3 |
| tensile_strength | ≥ 450 | ≥ 480 | MPa |
| yield_strength | ≥ 170 | ≥ 170 | MPa |
Compatibility Assessment
Alloy 800H / Incoloy 800H and Monel 400 have significantly different compositions (24% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Alloy 800H / Incoloy 800H the same as Monel 400?
Alloy 800H / Incoloy 800H and Monel 400 have a 24% composition overlap. They are generally not directly interchangeable.
Can I replace Alloy 800H / Incoloy 800H with Monel 400?
Generally not recommended. The compositions differ significantly (24% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Alloy 800H / Incoloy 800H and Monel 400?
The main differences are in the following elements: Ni, Cu, Fe. Alloy 800H / Incoloy 800H 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.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.