Inconel alloys are oxidation-corrosion-resistant materials well suited for service in extreme environments subjected to pressure and heat. When heated, Inconel forms a thick, stable, passivating oxide layer protecting the surface from further attack. Inconel retains strength over a wide temperature range, attractive for high temperature applications where aluminum and steel would succumb to creep as a result of thermally induced crystal vacancies. Inconel’s high temperature strength is developed by solid solution strengthening or precipitation hardening, depending on the alloy.
Inconel alloys vary widely in their compositions, but all are predominantly nickel, with chromium as the second element.
Inconel alloys are typically used in high temperature applications. Common trade names for
- Inconel Alloy 625 include: Inconel 625, Chronin 625, Altemp 625, Haynes 625, Nickelvac 625 and Nicrofer 6020.
- Inconel Alloy 600 include: NA14, N06600, BS3076, 2.4816, NCr15Fe (FR), NiCr15Fe (EU) and NiCr15Fe8 (DE).
- Inconel 718 include: Nicrofer 5219, Superimphy 718, Haynes 718, Pyromet 718, Supermet 718, and Udimet 718
|
Inconel |
Element, proportion by mass (%) |
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|
600 |
≥72.0 |
14.0–17.0 |
6.0–10.0 |
N/A |
≤1.0 |
≤0.5 |
≤0.5 |
≤0.15 |
≤0.015 |
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|
617 |
44.2–61.0 |
20.0–24.0 |
≤3.0 |
8.0–10.0 |
10.0–15.0 |
≤0.5 |
≤0.5 |
0.8–1.5 |
≤0.6 |
≤0.5 |
0.05–0.15 |
≤0.015 |
≤0.015 |
≤0.006 |
|
|
≥58.0 |
20.0–23.0 |
≤5.0 |
8.0–10.0 |
3.15–4.15 |
≤1.0 |
≤0.5 |
≤0.4 |
≤0.4 |
≤0.5 |
≤0.1 |
≤0.015 |
≤0.015 |
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|
690 |
≥58 |
27–31 |
7–11 |
≤0.50 |
≤0.50 |
≤0.50 |
≤0.05 |
≤0.015 |
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|
Nuclear grade 690 |
≥58 |
28–31 |
7–11 |
≤0.10 |
≤0.50 |
≤0.50 |
≤0.50 |
≤0.04 |
≤0.015 |
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|
718 |
50.0–55.0 |
17.0–21.0 |
Remainder |
2.8–3.3 |
4.75–5.5 |
≤1.0 |
≤0.35 |
≤0.3 |
0.2–0.8 |
0.65–1.15 |
≤0.35 |
≤0.08 |
≤0.015 |
≤0.015 |
≤0.006 |
|
X-750 |
≥70.0 |
14.0–17.0 |
5.0–9.0 |
0.7–1.2 |
≤1.0 |
≤1.0 |
≤0.5 |
0.4–1.0 |
2.25–2.75 |
≤0.5 |
≤0.08 |
≤0.01 |
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