Hastelloy X vs Waspaloy: 41% composition overlap. Significantly different materials serving different application areas.
Hastelloy X vs Waspaloy
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.
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.
| Hastelloy X | Waspaloy | |
|---|---|---|
| Material Number | 2.4665 | 2.4654 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B435 | ASTM B637 |
Chemical composition (wt%)
| Element | Hastelloy X | Waspaloy | Overlap |
|---|---|---|---|
| C | 0.05–0.15% | 0.02–0.1% | Partial |
| Si | 0–1% | 0–0.75% | OK |
| Mn | 0–1% | 0–1% | OK |
| Cr | 20.5–23% | 18–21% | Partial |
Mechanical properties
| Property | Hastelloy X | Waspaloy | Unit |
|---|---|---|---|
| tensile_strength | 690–760 | 1170–1310 | MPa |
| yield_strength | 275–345 | 720–895 | MPa |
| elongation | 35–45 | 15–25 | % |
Compatibility Assessment
Hastelloy X and Waspaloy have significantly different compositions (41% 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 Waspaloy?
Hastelloy X and Waspaloy have a 41% composition overlap. They are generally not directly interchangeable.
Can I replace Hastelloy X with Waspaloy?
Generally not recommended. The compositions differ significantly (41% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Hastelloy X and Waspaloy?
The main differences are in the following elements: C, Cr, Mo, B. Hastelloy X 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.