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 |