Superalloys

PER718

Spécifications

Common name
INCO 718
EU
NiCr19Fe19Nb5Mo3
USA
UNS:N07718
ISO Symbol
NiCr19Fe19Nb5Mo3
ISO Num
2.4668

Composition

C
0.04
Ni
Base
Cr
18
Mo
3
Ti
0.9
Al
0.5
Nb
5.2
Fe
18.5

Applications

• Aerospace industry: compressor discs.
• Marine and land-based machines.
• Fasteners or diverse components requiring a particularly high yield strength and which must also be stainless or non magnetic.

Characteristics

Precipitation hardened, nickel-based superalloy with:
• Good resistance to high temperature oxidation.
• Excellent mechanical properties up to temperatures around 700°C.
• Generally used for parts working within the 600-700°C range.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
H + V 1360 1120 18

Key to heat treatment symbols

Solution treated H Annealed R
Thermo-mechanical treatment TM Quenched and tempered T+RV
Sub-zero treatment F Solution treated and aged H+V

See also

MLX17

Stainless steels with structural hardening

AD730

Superalloys