Inconel 718
INCONEL 718 (UNS N07718) is a nickel-chromium alloy known for its excellent combination of high tensile, fatigue, creep, and rupture strength. This age-hardenable alloy is designed to withstand extreme temperatures, up to 700 °C, making it ideal for applications in aerospace, nuclear power, and oil and gas industries.
- UNS
- N07718
- Europe
- DIN 2.4668
- China
- GH4169
- Density
- 8.19 g/cm³
- Melting range
- 1260 – 1336 °C
- Delivery
- Solution annealed; aged to your drawing where the grade is age-hardenable.
What the spec says
Chemical composition in weight per cent and the standards we routinely certify to. Governing values are those printed on the EN 10204 certificate for your heat.
| Element | % |
|---|---|
| Ni | 50.0 - 55.0 |
| Cr | 17.0 - 21.0 |
| Fe | 11.1-22.5 |
| Mo | 2.80 - 3.30 |
| Nb | 4.75 - 5.50 |
| Ti | 0.65 - 1.15 |
| Al | 0.20 - 0.80 |
| Co | ≤ 1.00 |
| C | ≤ 0.08 |
| Mn | ≤ 0.35 |
| Si | ≤ 0.35 |
| S | ≤ 0.015 |
| P | ≤ 0.015 |
| Cu | ≤ 0.30 |
| B | ≤ 0.006 |
| Form | Standard |
|---|---|
| Plates | ASTM B670, ASME SB-670 |
| Round Bars | ASTM B637, ASME SB-637 |
| Seamless Tubes | ASTM B163, ASTM B407, DIN 2.4668 |
| Forgings | ASTM B637, ASME SB-637 |
| Wires | ASTM B666 |
Behaviour that matters in service
- High Strength and Durability — INCONEL 718 has excellent mechanical properties, including high tensile, creep, and rupture strength, maintained up to 700 °C. This makes it ideal for heavy-duty applications in aerospace and industrial sectors.
- Corrosion Resistance — It exhibits remarkable resistance to oxidation and corrosion in a wide range of environments, including those containing acids and salts.
- Weldability — INCONEL 718 is easily weldable, without the risk of cracking, which is often a challenge with other high-strength superalloys.
- Age-Hardenable — The alloy can be hardened by heat treatment, allowing for customization of mechanical properties depending on specific application requirements.
Typical applications
- Aerospace — Used extensively in aircraft engines, turbine blades, and other components subjected to extreme heat and mechanical stress.
- Nuclear Power — Ideal for use in steam generators and other high-temperature components in nuclear power plants.
- Industrial Gas Turbines — Utilized in components like combustion chambers, transition ducts, and turbine seals, which experience high heat and cyclic loading.
- Chemical Processing — Suitable for equipment exposed to corrosive environments, such as reactor vessels and heat exchangers.
How we ship Inconel 718
Melted in our own furnaces, tested in our own laboratory, and released with a certificate that matches the stamping on the bar or plate.
Forms
Round bar from 6 mm, plate, strip, seamless tube, open-die forgings and drawn wire.
Condition
Solution annealed; aged to your drawing where the grade is age-hardenable.
Documents
EN 10204 3.1 or 3.2, with chemistry, mechanical results and heat number traceability.
Inspection
SGS, BV, Intertek or your own inspector — welcomed before shipment.
Send the grade, the size, the quantity.
We will quote Inconel 718 against your specification — including lead time, inspection level and documents.