Inconel 601 vs Inconel 718: 39% composition overlap. Significantly different materials serving different application areas.
Inconel 601 vs Inconel 718
Side-by-side chemical composition and mechanical property comparison.
Overview
Inconel 601
2.4851
Nickel-chromium-iron alloy with aluminum for outstanding high-temperature oxidation resistance up to 1200°C. The Al forms a protective oxide scale resistant to spalling under cyclic thermal conditions. Better oxidation resistance than Inconel 600 (which lacks Al). Used for furnace hardware (baskets, trays, fixtures), radiant tubes, thermocouple protection tubes, catalyst support grids, and thermal reactors in automotive exhaust systems.
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.
| Inconel 601 | Inconel 718 | |
|---|---|---|
| Material Number | 2.4851 | 2.4668 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | EN 10095 | ASTM B637 |
Chemical composition (wt%)
| Element | Inconel 601 | Inconel 718 | Overlap |
|---|---|---|---|
| C | 0–0.1% | 0–0.08% | OK |
| Si | 0–0.5% | 0–0.35% | OK |
| Mn | 0–1% | 0–0.35% | OK |
| S | 0–0.015% | — | — |
Mechanical properties
| Property | Inconel 601 | Inconel 718 | Unit |
|---|---|---|---|
| tensile_strength | 550–750 | ≥ 1275 | MPa |
| yield_strength | 205–310 | ≥ 1034 | MPa |
| elongation | 30–50 | ≥ 12 | % |
Compatibility Assessment
Inconel 601 and Inconel 718 have significantly different compositions (39% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Inconel 601 the same as Inconel 718?
Inconel 601 and Inconel 718 have a 39% composition overlap. They are generally not directly interchangeable.
Can I replace Inconel 601 with Inconel 718?
Generally not recommended. The compositions differ significantly (39% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Inconel 601 and Inconel 718?
The main differences are in the following elements: Cr, Ni, Al. Inconel 601 is a Nickel Alloys grade, while Inconel 718 is a Nickel Alloys grade.
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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.