Monel 400 vs Waspaloy: 45% composition overlap. Significantly different materials serving different application areas.
Monel 400 vs Waspaloy
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
Waspaloy
2.4654
Nickel-based gamma-prime strengthened superalloy — THE turbine disc material. Excellent creep-rupture strength up to 650°C (rotating) and 870°C (static). Developed 1950s by Pratt & Whitney. Triple-aged (solution + stabilize + precipitation) for peak properties. Superior to Inconel 718 above 650°C. Used for compressor and rotor discs, shafts, spacers, seals, rings, casings, and fasteners in gas turbine engines.
| Monel 400 | Waspaloy | |
|---|---|---|
| Material Number | 2.4360 | 2.4654 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B127 | ASTM B637 |
Chemical composition (wt%)
| Element | Monel 400 | Waspaloy | Overlap |
|---|---|---|---|
| C | 0–0.3% | 0.02–0.1% | OK |
| Si | 0–0.5% | 0–0.75% | OK |
| Mn | 0–2% | 0–1% | OK |
| S | 0–0.024% | — | — |
Mechanical properties
| Property | Monel 400 | Waspaloy | Unit |
|---|---|---|---|
| tensile_strength | ≥ 480 | 1170–1310 | MPa |
| yield_strength | ≥ 170 | 720–895 | MPa |
| elongation | ≥ 35 | 15–25 | % |
Compatibility Assessment
Monel 400 and Waspaloy have significantly different compositions (45% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Monel 400 the same as Waspaloy?
Monel 400 and Waspaloy have a 45% composition overlap. They are generally not directly interchangeable.
Can I replace Monel 400 with Waspaloy?
Generally not recommended. The compositions differ significantly (45% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Monel 400 and Waspaloy?
The main differences are in the following elements: overall alloying content. Monel 400 is a Nickel Alloys grade, while Waspaloy is a Nickel Alloys grade.
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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.