Inconel 690
INCONEL 690 (UNS N06690) is a high-chromium nickel alloy known for its outstanding resistance to corrosion, particularly in high-temperature, oxidizing, and sulfur-containing environments. With excellent mechanical properties and stability, it is widely used in industries that demand long-term reliability in severe conditions.
- UNS
- N06690
- Europe
- DIN 2.4642
- Density
- 8.19 g/cm³
- Melting range
- 1343 – 1377 °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 | 58.0 - 63.0 |
| Cr | 27.0 - 31.0 |
| Fe | 7.0 - 11.0 |
| C | ≤ 0.05 |
| Mn | ≤ 0.50 |
| Si | ≤ 0.50 |
| S | ≤ 0.015 |
| Form | Standard |
|---|---|
| Plates | ASTM B168, ASME SB-168 |
| Round Bars | ASTM B166, ASME SB-166 |
| Seamless Tubes | ASTM B167, AMS 5581, DIN 2.4642 |
| Forgings | ASTM B564, ASME SB-564 |
Behaviour that matters in service
- Oxidation and Sulfidation Resistance — Excellent resistance to oxidation and sulfidation at high temperatures, ideal for use in extreme heat environments.
- Corrosion Resistance — High resistance to corrosion in acidic and alkaline environments, especially in applications exposed to sulfuric and nitric acids.
- Mechanical Strength — Retains high mechanical strength across a broad temperature range.
- Good Fabricability — Easily fabricated and weldable, enabling diverse industrial applications.
- Thermal Stability — Stable under prolonged exposure to high temperatures, making it suitable for demanding conditions.
Typical applications
- Nuclear Power — Commonly used in steam generator tubes and other components in nuclear power plants, where high corrosion resistance is crucial.
- Chemical Processing — Suitable for processing equipment exposed to corrosive chemicals, particularly acids.
- Aerospace — Ideal for parts in jet engines and exhaust systems due to its high thermal stability.
- Oil and Gas — Used in components that experience high-temperature corrosion, such as downhole tubulars and equipment for oil extraction.
- Industrial Heating — Employed in furnace parts, heaters, and other components that must withstand high temperatures over time.
How we ship Inconel 690
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 690 against your specification — including lead time, inspection level and documents.