Difference Between Inconel and Incoloy
Inconel
Inconel is a family of austenitic nickel-chromium-based superalloys.
Inconel Composition
Inconel | Element (% by mass) | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ni | Cr | Fe | Mo | Nb | Co | Mn | Cu | Al | Ti | Si | C | S | P | B | |
600 | 72.0 | 14.0–17.0 | 6.0–10.0 | 1.0 | 0.5 | 0.5 | 0.15 | 0.015 | |||||||
617 | 44.2–56.0 | 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 | 0.15 | 0.015 | 0.015 | 0.006 | |
625 | 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 | ||
690 | 59.5 | 30 | 9.2 | 0.35 | 0.01 | 0.02 | 0.35 | 0.019 | 0.003 | ||||||
718 | 50.0–55.0 | 17.0–21.0 | balance | 2.8–3.3 | 4.75–5.5 | 1.0 | 0.35 | 0.2–0.8 | 0.65–1.15 | 0.3 | 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 |
Inconel alloys
Alloys of inconel include:
- Inconel 600: Solid solution strengthened
- Inconel 601
- Inconel 625: Acid resistant, good weldability. The LCF version is typically used in bellows.
- Inconel 690: Low cobalt content for nuclear applications, and low resistivity
- Inconel 713C: Precipitation hardenable nickel-chromium base cast alloy
- Inconel 718: Gamma double prime strengthened with good weldability
- Inconel 751: Increased aluminium content for improved rupture strength in the 1600 °F range
- Inconel 792: Increased aluminium content for improved high temperature corrosion properties, used especially in gas turbines
- Inconel 939: Gamma prime strengthened to increase weldability
Incoloy
Incoloy refers to a range of superalloys produced by the Special Metals Corporation group of companies.
Incoloy Compositions (percentages)
Alloy name | Balance metal | Chromium | Aluminum | Titanium | Carbon | Yttrium oxide | Copper | Manganese | Cobalt | Nickel | Phosphorus | Silicon | Sulphur | Molybdenum | Nb+Ti |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
020 | Fe (~40%) | 20 | n/p | n/p | <0.07 | n/p | 3.5 | <2.0 | n/p | 35 | <0.045 | <1.0 | <0.035 | 2.5 | about 1 |
DS | Fe (~40%) | 18 | n/p | 0.2 | 0.1 | nil | 0.5 | 0.8-1.5 | 18 (Co+Ni 38) | 18 (Co+Ni 38) | n/p | 2.3 | 0.03 | ||
MA956 | Fe (~75%) | 20 | 4.75 | 0.4 | <0.1 | 0.5 | <0.15 | <0.3 | <0.3 | <0.5 | <0.02 | n/p | n/p |