Inconel 625 vs Waspaloy: 26% composition overlap. Significantly different materials serving different application areas.
Inconel 625 vs Waspaloy
Side-by-side chemical composition and mechanical property comparison.
Overview
Inconel 625
2.4856
Nickel-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.
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.
| Inconel 625 | Waspaloy | |
|---|---|---|
| Material Number | 2.4856 | 2.4654 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B443 | ASTM B637 |
Chemical composition (wt%)
| Element | Inconel 625 | Waspaloy | Overlap |
|---|---|---|---|
| C | 0–0.1% | 0.02–0.1% | OK |
| Si | 0–0.5% | 0–0.75% | OK |
| Mn | 0–0.5% | 0–1% | OK |
| Cr | 20–23% | 18–21% | Partial |
Mechanical properties
| Property | Inconel 625 | Waspaloy | Unit |
|---|---|---|---|
| tensile_strength | ≥ 827 | 1170–1310 | MPa |
| yield_strength | ≥ 414 | 720–895 | MPa |
| elongation | ≥ 30 | 15–25 | % |
Compatibility Assessment
Inconel 625 and Waspaloy have significantly different compositions (26% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Inconel 625 the same as Waspaloy?
Inconel 625 and Waspaloy have a 26% composition overlap. They are generally not directly interchangeable.
Can I replace Inconel 625 with Waspaloy?
Generally not recommended. The compositions differ significantly (26% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Inconel 625 and Waspaloy?
The main differences are in the following elements: Cr, Mo, Al, Ti. Inconel 625 is a Nickel Alloys grade, while Waspaloy is a Nickel Alloys grade.
Related Comparisons
View full data for each material:
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.