Alloy S, 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: Alloy 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.

Note: Alloy S  is a registered trademark of Haynes International, Inc.


Complete inspection equipment and quality system.
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