Alloy S
Equivalent designations
UNS N06635
Chemical composition
%
Ni
Cr
Mo
Fe
Co
W
C
Mn
Si
P
S
Al
Cu
La
B
min
balance
14.5
14.0
0.30
0.20
0.10
0.01
max
17.0
16.5
3.0
2.0
1.00
0.020
1.00
0.75
0.020
0.015
0.50
0.35
0.10
0.015
Physical properties
Density
8.75 g/cm3
Melting range
1335-1380℃
Features: Hastelloy S has excellent thermal stability, low thermal expansion and excellent oxidation resistance at 1093℃. It has good high temperature and thermal fatigue strength. It retains its strength and ductility after aging at temperatures of 427 to 871℃. Hastelloy S is particularly suitable for cyclical heating conditions where components must be capable of retaining their strength, ductility and metallurgical integrity after long time exposure.
Applications: Industrial furnaces, and gas turbine engine seal rings.