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| Form | ASTM |
| Rod, bar and forging | B 637 |
| Plate, sheet and strip | B 670, B 906 |
| Seamless pipe and tube | B 983 |
Chemical composition
| % | Ni | Fe | Cr | Mo | C | Mn | Si | P | S | Co | Nb+Ta | Ti | Al | Cu | B |
| min | 50.0 | balance | 17.0 | 2.80 | 4.75 | 0.65 | 0.20 | ||||||||
| max | 55.0 | 21.0 | 3.30 | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | 1.00 | 5.50 | 1.15 | 0.80 | 0.30 | 0.006 |
Physical properties
| Density | 8.23 g/cm3 |
| Melting range | 1260-1335℃ |
Features: Inconel 718 is an age-hardenable nickel-chromium alloy that combines corrosion resistance with high strength and good fabricability. It has high creep-rupture strength at temperatures up to 700℃. Its excellent relaxation resistance contributes to its application in springs.
Applications: Gas turbine engines, rocket motors, nuclear reactors and spacecraft.
Note: Inconel is a registered trademark of the Special Metals Corporation group of companies.