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

Applications

Aerospace
Marine
Chemical Processing

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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