Inconel 718 comprises of nickel-chromium, along with niobium and molybdenum, offering heat treatment-derived high strength, exceptional corrosion resistance, formability and weldability, plus resistance to strain age cracking, up to 700ºC.
Inconel 718 (UNS N07718) Nickel Alloy Applications
- Chemical processing
- Aerospace
- Liquid fuel rocket motor components
- Pollution-control equipment
- Nuclear reactors
- Cryogenic storage tanks
- Valves, fasteners, springs, mandrels, tubing hangers
- Well head completion equipment and blow out preventers (BOP's)
- Gas turbine engine parts
Inconel 718 Nickel Alloy Standards
- UNS N07718
- ASTM B637, ASTM B670
- AMS 5596, AMS 5662, AMS 5663, AMS 5832
- ASME Case 2222-1, SFA 5.14
- NACE MR0175
- EN 2.4668, Werkstoff 2.4668
- GE B50TF14, B50TF15
- Other common names: Alloy 718, Haynes 718, Nicrofer 5219, Allvac 718, Altemp 718
Inconel 718 Nickel Alloy Chemical Composition %
| Ni | 50-55 | Cr | 17-21 |
| Mo | 2.8-3.3 | Mn | 0.35 max |
| Cu | 0.23 max | Si | 0.35 max |
| C | 0.045 max | S | 0.01Max |
| P | 0.01 max | Co | 1.0 max |
| Cb+Ta | 4.87-5.2 | Pb | 1000 ppm |
| Se | 0.0005ppm | B | 50mmpa |
| Mg | 0.0006ppm | Ti | 0.8-1.15 |
| Al | 0.4-0.1 | Fe | Balance |
Inconel 718 Nickel Alloy Mechanical Properties
| Inconel 718 | Min | Max |
| Ultimate tensile strength, ksi | 150 | - |
| 0.2% yield strength, ksi | 120 | 145 |
| Elongation, % | 20% | - |
| Reduction of area, % | 35% | - |
| Impact Strength*Min average/ min single, ft-lbs | 40/35 | - |
| Hardness, Rockwell C | 32 | 40 |
Inconel 718 (UNS N07718) Nickel Alloy Characteristics
- Good mechanical properties - tensile, fatigue and creep-rupture
- Yield tensile strength, creep, and rupture strength properties are exceedingly high
- Highly resistant to chloride and sulfide stress corrosion cracking
- Resistant to aqueous corrosion and chloride ion stress corrosion cracking
- High temperature resistant
- Age-hardenable with a unique property of slow aging response that permits heating and cooling during annealing without the danger of cracking.
- Excellent welding characteristics, resistant to postweld age cracking
- Available Sizes And Specifications