Hastelloy S nickel round bar, UNS N06635 nickel plate

Short Description:

HASTELLOY S alloy (UNS N06635) is a nickel-base, high-temperature alloy with a unique combination of properties. It has excellent thermal stability, low thermal expansion and excellent oxidation resistance to 2000°F (1093°C). In addition, the alloy has good high-temperature and thermal fatigue strength. S alloy retains its strength and ductility after aging at temperatures of 800 to 1600°F (427 to 871°C).

S alloy was developed for applications involving severely cyclical heating conditions where components must be capable of retaining their strength, ductility, and metallurgical integrity after long-time exposure. It is used extensively as seal rings in gas turbine engines where its low thermal expansion coefficients is also important.

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Product Detail

Product Tags

Specifications

▪ AMS 5711
▪ AMS 5838
▪ AMS 5873

Machinability

Hastelloy S has good machining characteristics. Tooling is required to avoid work hardening and chatter.

Forming

Hastelloy S can be formed using conventional methods.

Welding

Hastelloy S is welded using metal inert gas and tungsten inert gas welding methods.

Heat Treatment

Hastelloy S is heat treated by annealing at 1066°C (1950°F) followed by cooling in air.

Forging

Hastelloy S is forged at 872 to 1149°C (1600 to 2100°F).

Hot Working

Hastelloy S can be hot worked at 872 to 1149°C (1600 to 2100°F).

Cold Working

Hastelloy S can be easily cold worked.

Annealing

Hastelloy S is annealed at 1066°C (1950°F) followed by cooling in air.

Aging

Hastelloy S is aged at 538 to 872°C (1000 to 1600°F) in order to restores its ductility and strength.

Hardening

Hastelloy S can be hardened by cold working.

Applications

Hastelloy S is used in gas turbines.

Chemical Composition

Elements	Content (%)
Nickel, Ni	67
Chromium, Cr	14.5 - 17
Molybdenum, Mo	14 - 16.5
Iron, Fe	3
Cobalt, Co	2
Tungsten, W	1
Copper, Cu	0.35
Manganese, Mn	0.30 - 1.0
Silicon, Si	0.20 - 0.75
Aluminum, Al	0.10 - 0.50
Carbon, C	0.020
Phosphorous, P	0.020
Boron, B	0.015
Sulfur, S	0.015
Lanthanum, La	0.010 - 0.10