Alloy 28 / Sanicro 28 vs Monel 400: 23% composition overlap. Significantly different materials serving different application areas.
Alloy 28 / Sanicro 28 vs Monel 400
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.
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 28 / Sanicro 28 | Monel 400 | |
|---|---|---|
| Material Number | 1.4563 | 2.4360 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | EN 10088 / ASTM B709 | ASTM B127 |
Chemical composition (wt%)
| Element | Alloy 28 / Sanicro 28 | Monel 400 | Overlap |
|---|---|---|---|
| C | ≤ 0.02% | 0–0.3% | OK |
| Si | ≤ 1% | 0–0.5% | OK |
| Mn | ≤ 2.5% | 0–2% | OK |
| S | — | 0–0.024% | — |
Mechanical properties
| Property | Alloy 28 / Sanicro 28 | Monel 400 | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | ≥ 480 | MPa |
| yield_strength | ≥ 220 | ≥ 170 | MPa |
| elongation | ≥ 35 | ≥ 35 | % |
Compatibility Assessment
Alloy 28 / Sanicro 28 and Monel 400 have significantly different compositions (23% 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 Monel 400?
Alloy 28 / Sanicro 28 and Monel 400 have a 23% composition overlap. They are generally not directly interchangeable.
Can I replace Alloy 28 / Sanicro 28 with Monel 400?
Generally not recommended. The compositions differ significantly (23% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Alloy 28 / Sanicro 28 and Monel 400?
The main differences are in the following elements: Ni, Cu, Fe. Alloy 28 / Sanicro 28 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.
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