Alloy 718
About Alloy 718
What is Alloy 718?
Alloy 718 is a high-strength, corrosion-resistant nickel chromium material used at -423° to 1300°F.
The age-hardenable alloy can be readily fabricated, even into complex parts. Its welding characteristics, especially its resistance to postweld cracking, are outstanding.
Examples of these are components for liquid fueled rockets, rings, casings and various formed sheet metal parts for aircraft and land-based gas turbine engines, and cryogenic tankage.
It is also used for fasteners and instrumentation parts.
Alloy 718 is available as pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon, wire and extruded section.
Alloy 718 Standards
SAE AMS 5589
-Seamless Pipe & Tube
SAE AMS 5590
-Seamless Pipe & Tube
ASTM B637
-Rod & Bar
ASTM B670
-Plate, Sheet, Strip & Foil
Alloy 718 Chemical Composition
Alloy 718 Data Sheet
Alloy 718 Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN | OR |
| Alloy 718 | 2.4668 | N07718 | – | – | – | – | – | – |
Alloy 718 Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.28 g/cm3 | 1390 °C (2540 °F) | MPa – 910 | MPa – 550 | 25 % |
Alloy 718 Physical Properties
| Melting Range | Specific Heat, 20°C (J/(g.K)) | Magnetic Permeability (20°C) | Thermal Conductivity, 20°C (W/(m.K)) | Curie Temperature (°C) |
| 1336 °C (2437 °F) | 435 | ＜1.002 | 11.1 | -112 |
Alloy 718 Applications
Alloy 718 Related Resources
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