Haynes 230 vs Inconel 718: 18% composition overlap. Significantly different materials serving different application areas.
Haynes 230 vs Inconel 718
Side-by-side chemical composition and mechanical property comparison.
Overview
Haynes 230
2.4733
Nickel-chromium-tungsten alloy — THE combustor can material for gas turbines. Outstanding oxidation resistance to 1149°C for prolonged exposure. Excellent long-term thermal stability (no sigma/mu phase after 16000h at 649-870°C). Lower thermal expansion than most high-temp alloys. Lanthanum addition improves oxide scale adherence. Used for gas turbine combustion cans, transition ducts, furnace retorts, and catalyst grids in nitric acid production.
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.
| Haynes 230 | Inconel 718 | |
|---|---|---|
| Material Number | 2.4733 | 2.4668 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B435 | ASTM B637 |
Chemical composition (wt%)
| Element | Haynes 230 | Inconel 718 | Overlap |
|---|---|---|---|
| C | 0.05–0.1% | 0–0.08% | Partial |
| Si | 0.25–0.75% | 0–0.35% | Partial |
| Mn | 0.3–1% | 0–0.35% | Partial |
| Cr | 20–24% | 17–21% | Partial |
Mechanical properties
| Property | Haynes 230 | Inconel 718 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 760 | ≥ 1275 | MPa |
| yield_strength | ≥ 310 | ≥ 1034 | MPa |
| elongation | ≥ 40 | ≥ 12 | % |
Compatibility Assessment
Haynes 230 and Inconel 718 have significantly different compositions (18% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Haynes 230 the same as Inconel 718?
Haynes 230 and Inconel 718 have a 18% composition overlap. They are generally not directly interchangeable.
Can I replace Haynes 230 with Inconel 718?
Generally not recommended. The compositions differ significantly (18% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Haynes 230 and Inconel 718?
The main differences are in the following elements: C, Si, Mn, Cr. Haynes 230 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.
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