- Top Star Metal Materials Co.,Ltd
UNS N07718
Ease of processing
High tensile strength, fatigue strength
creep strength and fracture strength at 700°C
High oxidation resistance at 1000°C
Stable chemical properties at low temperatures
good welding performance
Inconel 718 is a commonly used nickel-based superalloy, also known as nickel-iron-based superalloy. It is composed of elements such as nickel, chromium, iron, molybdenum, aluminum and titanium, and has extremely high strength and heat resistance. Inconel 718 is usually used in applications under high temperature and high pressure environment, such as aerospace, petrochemical and nuclear energy and other fields.
| Alloy | % | Ni | Fe | Cr | Mo | C | Mn | Si | P | S |
| UNS N07718 | Min | 50 | other | 17 | 2.8 | / | / | / | / | / |
| Max | 55 | other | 21 | 3.3 | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | |
| Co | Nb+Ta | Ti | Al | Cu | B | |||||
| / | 4.75 | 0.65 | 0.2 | / | / | |||||
| 1 | 5.5 | 1.15 | 0.8 | 0.3 | 0.006 |
The strength and heat resistance of Inconel 718 come from its constituent elements and its special heat treatment process. Elements such as chromium, molybdenum, and titanium improve the alloy’s corrosion and oxidation resistance, while increasing hardness and strength. Aluminum element can improve the heat resistance of the alloy. At high temperatures, these elements form a protective oxide layer that prevents the alloy from being oxidized or corroded.
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