Inconel 718 Nickel Alloy Sheets Overview
Inconel 718 is a Gamma Prime strengthened alloy with excellent mechanical properties at elevated temperatures, as well as cryogenic temperatures. Suitable for temperatures up to around 1300°F (705°C), this alloy can be readily worked and age hardened.
This high-performance alloy demonstrates excellent strength from -423°F to 1300°F (-253°C to 705°C), is age hardenable, and can be welded in fully aged condition. It offers excellent oxidation resistance up to 1800°F (980°C) and is typically sold in the solution annealed temper, but can be ordered aged, cold worked, or cold worked & aged.
Inconel 718 Plate is supplied to AMS 5596/5597 with UNS designation N07718. This nickel-chromium alloy contains aluminum, which enables it to demonstrate high mechanical properties even in extremely hot environments. Common applications include jet engine and gas turbine operations, cryogenic storage tanks, downhole shafts, and wellhead parts.
Available Product Forms
Sheet, Plate, Coil, Strip, Wire, Pipe, Tube, Bar, Profile, Round, Flat, Square, Hexagonal
Specifications and Standards
| Form |
Standard |
| Metal Type |
UNS N07718 |
| Bar |
ASTM B637, AMS 5662, AMS 5663, AMS 5664, PWA 1009, PWA 1010, GE B50TF15 |
| Wire |
AMS 5832 |
| Sheet |
ASTM B670, AMS 5596, AMS 5597, PWA 1033, GE B50TF14 |
| Plate |
ASTM B670, AMS 5596, AMS 5597, PWA 1033, GE B50TF15 |
| Tube |
AMS 5589, AMS 5590 |
| Pipe |
AMS 5589, AMS 5590 |
| Forging |
ASTM B637, AMS 5562, AMS 5663, AMS 5664, PWA 1009, PWA 1010, GE B50TF15 |
| Weld Wire |
A5.14 ERNiFeCr-2 |
| DIN |
2.4668 |
Common Trade Names
Alloy 718, Inconel® 718, Nickel 718
Dimension Ranges
Width: 600mm - 2030mm
Thickness: 0.1mm - 120.0mm
Length: 300mm - 6000mm (Maximum 18000mm)
Surface Finish Options
No.1, 2B, BA, No.3, No.4, No.5, No.8, HL, Etching, SB, Ti-coating, color-coating, embossing
Applications
- Gas turbine components and cryogenic storage tanks
- Jet engines, pump bodies and parts
- Rocket motors and thrust reversers
- Nuclear fuel element spacers and hot extrusion tooling
- High strength bolting and down hole shafting
Material Equivalents
UNS N07718
DIN NiCr19NbMo
EN NiCr19NbMo
Chemical Composition
| Element |
Percentage |
| Carbon |
0.08 max |
| Manganese |
0.35 max |
| Phosphorus |
0.015 max |
| Sulfur |
0.015 max |
| Silicon |
0.35 max |
| Chromium |
17-21 |
| Nickel |
50-55 |
| Molybdenum |
2.80-3.30 |
| Columbium |
4.75-5.50 |
| Titanium |
0.65-1.15 |
| Aluminum |
0.20-0.80 |
| Cobalt |
1.00 max |
| Boron |
0.006 max |
| Copper |
0.30 max |
| Tantalum |
0.05 max |
| Iron |
Balance |
Corrosion and Oxidation Resistance
Inconel 718 has good resistance to oxidation and corrosion at temperatures within the alloy's useful strength range, particularly in atmospheres encountered in jet engines and gas turbine operations.
Physical Properties
| Property |
Solution Treated |
Solution Treated and Aged |
| Density |
0.296 lb/in³ (8.192 g/cm³) |
0.297 lb/in³ (8.22 g/cm³) |
| Specific Gravity |
8.19 |
8.22 |
| Melting Range |
2500-2600°F (1370-1430°C) |
2500-2600°F (1370-1430°C) |
Thermal Conductivity
| Temperature Range |
Thermal Conductivity |
| 0-100°C (32-212°F) |
6.5 W/m·K (11.2 Btu·ft/ft²·hr·°F) |
Mechanical Properties
Sheet and Strip (AMS 5596/5597)
| Property |
Minimum Value |
| Yield Strength (0.2% offset) |
80,000 psi (550 MPa) |
| Ultimate Tensile Strength |
140,000 psi (965 MPa) |
| Elongation (2") |
30% minimum |
Plate (Solution Treated + Precipitation Heat Treated)
| Property |
Minimum Value |
| Yield Strength (0.2% offset) |
150,000 psi (1,035 MPa) |
| Ultimate Tensile Strength |
180,000 psi (1,240 MPa) |
| Elongation (2") |
12% minimum |