Inconel 718
Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing niobium and molybdenum. It is valued for very high strength, good fatigue resistance and useful corrosion resistance over a broad temperature range.
Inconel 718 Grade Information
Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing niobium and molybdenum. It is valued for very high strength, good fatigue resistance and useful corrosion resistance over a broad temperature range.
Alloy 718 flat-product specification with a different solution-treatment route from AMS 5596.
| Material specification | AMS 5597 |
|---|---|
| Material identification | N07718 |
| Product / supply condition | Solution treated at approximately 1066 °C; confirm the ordered revision. |
Inconel 718 Chemical Composition
Manufacturer alloy composition limits, mass %; selected elements only. These are not the complete acceptance limits of the standard on this page.
| Element / description | Mass % / reference value |
|---|---|
| Ni | 50.0–55.0 (including Co) |
| Cr | 17.0–21.0 |
| Mo | 2.80–3.30 |
| Nb + Ta | 4.75–5.50 |
| Ti | 0.65–1.15 |
| Al | 0.20–0.80 |
Inconel 718 Mechanical Properties
Published reference values for the stated form and condition. Typical values are not specification acceptance limits.
The solution treatment and subsequent ageing cycle determine the applicable mechanical properties. Use the ordered edition and its stated delivery and test conditions.
Manufacturer reference data is shown for comparison. Use the selected AMS 5597 edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.
AMS 5597 Grade Reference
N07718
| Material specification | AMS 5597 |
|---|---|
| Source edition | AMS5597H (2022 publisher revision) |
| Product / supply condition | Solution treated at approximately 1066 °C; confirm the ordered revision. |
| Specification information | The reviewed scope covers sheet, strip and plate. Acceptance includes condition-specific requirements; the AMS 5596 values are not interchangeable. |
| Comparison tables | View the AMS 5597 comparison tables |
| Material overview | View Inconel 718 in Materials |
| Publisher reference | AMS 5597 publisher reference |
| Source reference | Special Metals — INCONEL alloy 718 technical bulletin (composition and heat-treatment conditions) |
| Source reference | Haynes International — 718 flat-product specifications |
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