Alloy 28 / Sanicro 28 vs Inconel 718: 12% composition overlap. Significantly different materials serving different application areas.
Alloy 28 / Sanicro 28 vs Inconel 718
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.
Inconel 718
2.4668
THE most widely used aerospace superalloy. Precipitation-hardened Ni-Cr-Fe alloy strengthened by gamma-prime and gamma-double-prime phases (Nb). Unique slow aging kinetics allow welding without cracking. UTS >1275 MPa aged. Used for gas turbine discs, jet engine components, rocket motors, cryogenic tanks, and oil/gas downhole tools. Service to 700°C.
| Alloy 28 / Sanicro 28 | Inconel 718 | |
|---|---|---|
| Material Number | 1.4563 | 2.4668 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | EN 10088 / ASTM B709 | ASTM B637 |
Chemical composition (wt%)
| Element | Alloy 28 / Sanicro 28 | Inconel 718 | Overlap |
|---|---|---|---|
| C | ≤ 0.02% | 0–0.08% | OK |
| Si | ≤ 1% | 0–0.35% | OK |
| Mn | ≤ 2.5% | 0–0.35% | OK |
| Cr | 26–28% | 17–21% | No overlap |
Mechanical properties
| Property | Alloy 28 / Sanicro 28 | Inconel 718 | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | ≥ 1275 | MPa |
| yield_strength | ≥ 220 | ≥ 1034 | MPa |
| elongation | ≥ 35 | ≥ 12 | % |
Compatibility Assessment
Alloy 28 / Sanicro 28 and Inconel 718 have significantly different compositions (12% 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 Inconel 718?
Alloy 28 / Sanicro 28 and Inconel 718 have a 12% composition overlap. They are generally not directly interchangeable.
Can I replace Alloy 28 / Sanicro 28 with Inconel 718?
Generally not recommended. The compositions differ significantly (12% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Alloy 28 / Sanicro 28 and Inconel 718?
The main differences are in the following elements: Cr, Mo, Ni, Cu. Alloy 28 / Sanicro 28 is a Nickel Alloys grade, while Inconel 718 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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