A Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700oC (1290oF). It has higher strength than Inconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 and Inconel X-750.
Inconel® 718 is also known as Nicrofer 5219, Superimphy 718, Haynes 718, Pyromet 718, Supermet 718. and Udimet 718.
| Chemical Composition | Specifications | Designations | Key Features | Typical Applications | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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AMS 5662 AMS 5663 AMS 5832 AMS 5962 ASTM B637 GE B5OTF14/15 GE B14H89 ISO 15156-3 (NACE MR 0175) |
W.NR 2.4668 UNS N07718 AWS 013 |
Good creep rupture strength at high temperatures Higher strength than Inconel X-750 Better mechanical properties at lower temperatures than Nimonic 90 & Inconel X-750 Age hardenable High temperature dynamic applications^^ |
Gas Turbines Rocket Motors Space Craft Nuclear Reactors Pumps |
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| Density | 8.19g/cm³ | 0.296 lb/in³ |
| Melting Point | 1336°C | 2437°F |
| Coefficient of Expansion | 13.0 μm/m °C (20 – 100°C) | 7.2 x 10-6 in/in °F (70 – 212°F) |
| Modulus of Rigidity | 77.2 kN/mm² | 11197 ksi |
| Modulus of Elasticity | 204.9 kN/mm² | 29719 ksi |
| Heat Treatment of Finished Parts | |||||
|---|---|---|---|---|---|
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| No. 1 or Spring Temper | Anneal Age Harden Total Age |
980 720 620 |
1800 1330 1150 |
1 8 18 |
Air Furnace Air |
| No. 1 or Spring Temper (for ISO 15156-3 / NACE MR 0175) |
Anneal Age Harden |
1010 790 |
1850 1455 |
2 6 |
Air Air |
| No. 1 Temper or Spring Temper | Age Harden Total Age |
720 620 |
1330 1150 |
8 18 |
Furnace Air |
| Properties | ||||
|---|---|---|---|---|
| Condition | Approx. tensile strength | Approx. operating temperature depending on load^^ and environment | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 800 – 1000 | 116 – 145 | – | – |
| No 1 Temper | 1000 – 1200 | 145 – 175 | – | – |
| Spring Temper | 1250 – 1550 | 180 – 225 | – | – |
| No 1 Temper + Annealed + Aged | 1250 – 1450 | 181 – 210 | -200 to +550 | -330 to +1020 |
| No 1 Temper + Aged | 1520 – 1720 | 220 – 250 | Contact Alloy Wire Technical Dept | |
| Spring Temper + Annealed + Aged | 1250 – 1450 | 181 – 210 | -200 to +550 | -330 to +1020 |
| Spring Temper + Aged | 1700 – 1950 | 247 – 283 | Contact Alloy Wire Technical Dept | |
The above tensile strength ranges are typical. If you require different please ask.
^^ Dynamic applications = active / lively / changing
