Nickel Alloy 718 / 2.4668 / UNS N07718 / L718
Nickel Alloy 718 – High-Performance Nickel Alloy for Extreme Temperatures and Heavy Loads
Properties of Alloy 718
Nickel Alloy 718 is a precipitation-hardenable, high-temperature resistant nickel-based alloy with exceptional heat resistance and high-temperature tensile strength up to 750°C. The alloy also exhibits excellent creep resistance up to 700°C.
Alloy 718 offers excellent strength at elevated temperatures, making it particularly suitable for heavily loaded components in extreme environments. Its composition, which includes nickel, chromium, and molybdenum, ensures outstanding corrosion and oxidation resistance, even in aggressive media.
The material is available in cold- and hot-formed conditions. It exhibits a great forgeability and can be welded.
Applications of Alloy 718
Alloy 718 is available in three main specification ranges tailored to specific industries:
Alloy 718 according to AMS – for applications under high mechanical loads at elevated temperatures:
- Gas turbines
- Aircraft engines
- Nuclear reactors
Alloy 718 according to API – various components for the oil and gas industry in corrosive environments, such as sour gas:
- Completion tools
- Tubing hangers
- Pumps
- Valves
On request, the material is available at a yield strengths up to 150 ksi (1034 MPa).
Alloy 718 according to ASTM – for demanding industrial applications requiring maximum strength and durability:
- Extrusion tools for copper and copper alloys
- Metal cutting knives
Why choose Alloy 718 from voestalpine Specialty Metals?
- Top quality and purity through advanced metallurgy
- Tailor-made solutions for aerospace, energy, and oil & gas industries in compliance with different customer specifications.
- Material availability from stock and mill.
Specification Overview
| Material number | 2.4668 |
| Alloy | 718 |
| EN designation | NiCr19Fe19Nb5M o3 |
| UNS | UNS N07718 |
| Böhler designation | L718 |
| Standard | Sheet: ASTM B670 Bar: ASTM B637/ ASME Sect.II Part B-SB637 AMS 5662 (solution annealed) / AMS 5663 (aged) API 6ACRA, DIN EN 17744 / 17750 (sheet and plates) DIN EN 17744 / 17752 (bars) |
Physical Properties:
| Material Density | 8.2 g/ccm |
| Permeability | ca. 1.0011 |
Mechanical Properties:
| Rp0.2 | 1034 N/mm² (ASTM B637 / AMS 5663) |
| Rm | 1275 N/mm² (ASTM B637 / AMS 5663) |
Typical Chemical Composition (weight %):
In accordance with API standards.
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu |
| max. 0.045 | max. 0.35 | max. 0.35 | max. 0.010 | max. 0.010 | 17.0 to 21.0 | 2.80 to 3.30 | 50.0 to 55.0 | max. 0.23 |
| Co | Ti | Al | Nb | Nb+Ta | B | Fe | Pb | Bi |
| max. 1.00 | 0.80 to 1.15 | 0.40 to 0.60 | 4.87 to 5.20 | 4.87 to 5.20 | max. 0.0060 | REM | max. 0.0010 | max. 0.00005 |
| Ca | Mg | Se | ||||||
| max. 0.0030 | max. 0.0060 | max. 0.0005 |
Typical Stock Size Range:
Bars (diameter in mm)
12.70 / 16.00 /19.05 / 25.40 / 31.75 / 40.00 / 44.45 / 50.80
60.00 / 70.00 / 80.00 / 90.00 / 101.60 / 120.00 / 130.00 / 140.00
152.00 / 180.00 / 203.20
Wst.Nr. 2.4668 / Alloy 718
AMS 5662, capable of AMS 5663
ASTM B637 / ASME Sec.II PartB-SB-637 UNS N07718
Inspection certificate: EN10204 3.1
Plates and Sheets (thickness in mm)
1.50 / 2.00 / 2.50 / 3.20 / 4.00 / 5.00 / 6.35 / 10.00
12.00 / 16.00 / 20.00
Wst.No. 2.4668 / Alloy 718
AMS 5596, ASTM B670 UNS N07718
Inspection certificate: EN10204 3.1
Other dimensions on request. Factory quantities also possible. All information without guarantee and for informational purposes only.