Alloy 28 / Sanicro 28 vs Waspaloy: 20% composition overlap. Significantly different materials serving different application areas.
Alloy 28 / Sanicro 28 vs Waspaloy
Side-by-side chemical composition and mechanical property comparison.
Overview
Alloy 28 / Sanicro 28
1.4563
Super-austenitic stainless steel (Fe-31Ni-27Cr-3.5Mo-1Cu) with ultra-low carbon. Exceptional resistance to sulfuric acid, phosphoric acid, and chloride stress corrosion cracking. Solution-annealed: Rm 500–750 MPa, Rp0.2 ≥220 MPa, A ≥35%. Density 8.0 g/cm³, PREN ~39–47. UNS N08028, ASTM B709/B668. Applications: phosphoric acid evaporators, sulfuric acid piping, oil/gas sour service (NACE MR0175), seawater heat exchangers, nuclear fuel reprocessing. Alleima trade name Sanicro 28.
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.
| Alloy 28 / Sanicro 28 | Waspaloy | |
|---|---|---|
| Material Number | 1.4563 | 2.4654 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | EN 10088 / ASTM B709 | ASTM B637 |
Chemical composition (wt%)
| Element | Alloy 28 / Sanicro 28 | Waspaloy | Overlap |
|---|---|---|---|
| C | ≤ 0.02% | 0.02–0.1% | Partial |
| Si | ≤ 1% | 0–0.75% | OK |
| Mn | ≤ 2.5% | 0–1% | OK |
| Cr | 26–28% | 18–21% | No overlap |
Mechanical properties
| Property | Alloy 28 / Sanicro 28 | Waspaloy | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | 1170–1310 | MPa |
| yield_strength | ≥ 220 | 720–895 | MPa |
| elongation | ≥ 35 | 15–25 | % |
Compatibility Assessment
Alloy 28 / Sanicro 28 and Waspaloy have significantly different compositions (20% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Alloy 28 / Sanicro 28 the same as Waspaloy?
Alloy 28 / Sanicro 28 and Waspaloy have a 20% composition overlap. They are generally not directly interchangeable.
Can I replace Alloy 28 / Sanicro 28 with Waspaloy?
Generally not recommended. The compositions differ significantly (20% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Alloy 28 / Sanicro 28 and Waspaloy?
The main differences are in the following elements: C, Cr, Mo, Fe. Alloy 28 / Sanicro 28 is a Nickel Alloys grade, while Waspaloy 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.