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718
Nickel Alloy 718 Product Guide
Applications | Mechanical and Chemical Data | Tolerances
Overview
A high strength and high fatigue resistance alloy, Nickel Alloy 718 is designed for extended usage at extreme temperatures. Ductility and toughness remain high, though it cannot be cold worked. The service temperatures of Nickel 718 run from cryogenic to 1200 F (649 C). Typically used in gas turbines, liquid fuel rocket motors, springs, fasteners, and cryogenic tanks.
Common Trade Names
UNS N07718, Nickel 718, Alloy 718, INCONEL® 718*, Haynes® 718*, Nicrofer® 5219*, Alvac® 718*, Altemp® 718*
*INCONEL® is a trademark of the Special Metals group.
*Haynes® is a registered trademark of Haynes International Inc.
*Nicrofer® is a registered trademark of VDM Metals Group.
*Alvac® is a registered trademark of VDM Metals Group.
*Altemp® is a registered trademark of Connaught Technology Corporation.
Other resources
Safety Data Sheet | Weight Calculator | Mill Test Reports
Products
Nickel 718 Round Bar | Nickel 718 Sheet
Nickel 718 Specifications
ASTM | AMS |
|---|---|
| B637 | 5596 |
| 5662 |
| Physical Properties 718 | |||||
| Density | 0.296 lb/in3 | ||||
| Ultimate Tensile Strength | 145 ksi max. | ||||
| Yield Tensile Strength | 70 ksi | ||||
| Shear Modulus | 11,000 ksi | ||||
| Shear Strength | N/A | ||||
| Hardness Rockwell | Brinell | B100 | 240 | ||||
| Elongation at Break Percentage | 45% | ||||
| Modulus of Elasticity | 28,000 ksi | ||||
| Poisson's Ratio | 0.29 | ||||
| Machinability Percentage | 12% | ||||
| Melting Point | 2,410-2,540 °F | ||||
| Specific Heat | 1.04 x 10^-1 BTU/lb-°F | ||||
| Thermal Conductivity | 79.1 BTU-in/hr-ft^2-°F | ||||
| Electrical Conductivity | 1.4% IACS | ||||
|
Chemistry Information
|
|
Element |
Percentage |
| C | 0.08 max |
| Mn | 0.35 max |
| P | 0.015 max |
| S | 0.015 max |
| Si | 0.35 max |
| Cr | 17 - 21 |
| Ni | 50 - 55 |
| Mo | 2.8 - 3.3 |
| Nb | 4.75 - 5.5 |
| Ti | 0.65 - 1.15 |
| Al | 0.2 - 0.8 |
| Co | 1 max |
| Bo | 0.006 max |
| Cu | 0.3 max |
| Ta | 0.05 max |
| Fe | - |
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