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Personne àcontacter Ms. Iren
F14/A,NO.618 XiKang Rd, JingAn District Shanghai, Shanghai, Shanghai
Excellent High-Temperature
Strength, Thermal Stability, and Environment Resistance
Haynes **0 alloy is a nickel-chromium-tungsten-molybdenum alloy
that combines excellent high temperature strength, outstanding
resistance to oxidizing environments up to ***0°F (***9°C) for
prolonged exposures, premier resistance to nitriding environments,
and excellent long-term thermal stability. It is readily fabricated
and formed, and is castable. Other attractive features include
lower thermal expansion characteristics than most high-temperature
alloys, and a pronounced resistance to grain coarsening with
prolonged exposure to high-temperatures.
Easily Fabricated
Haynes **0 alloy has excellent forming and welding characteristics.
It may be forged or otherwise hot-worked, providing that it is held
at ***0°F (***7°C) for a time sufficient to bring the entire piece
to temperature. As a consequence of its good ductility, **0 alloy
is also readily formed by cold-working. All hot- or cold-working
parts should be annealed and rapidly cooled in order to restore the
best balance of properties. The alloy can be welded by a variety of
techniques, including gas tungsten arc (GTAW), gas metal arc
(GMAW), and resistance welding.
Heat-Treatment
Wrough **0 alloy is furnished in the solution heat-treated
condition, unless otherwise specified. The alloy is solution
heat-treated in the range of ***0 to ***5°F (***7°C) and rapidly
cooled or water-quenched for optinum properties.
Annealing at temperatures lower than the solution heat-treating
temperatures will produce some carbide precipitation in **0 alloy,
which may marginally affect the alloy's strength and
ductility.
Casting
Haynes **0 alloy may be cast using traditional air-melt sand mold
or vacuum-melt investment casting foundry practices. Silicon levels
at the high end of the specification range are recommended for
enhanced fluidity. Castings may be used in either the as-cast or
solution-heat-treated condition depending upon property
requirements.
Applications
Haynes **0 alloy combines properties which make it ideally suited
for a wide variety of component applications in the aerospace and
power industries. It is used for combustion cans, transition ducts,
flameholders, thermocouple sheaths, and other important gas turbine
components. In the chemical process industry, **0 alloy is used for
catalyst grid supports in ammonia burners, high-strength
thermocouple protection tubes, high-temperature heat exchangers,
ducts, high-temperature bellows, and various other key process
internals.
In the industrial heating industry, applications for **0 alloy
include furnace retorts, chains and fixtures, burner flame shrouds,
recuperator internals, dampers, nitriding furnace internals,
heat-treating baskets, grates, trays, sparger tubes, thermocouple
protection tubes, cyclone internals, and many more.
