CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

ALLOY CHARACTERISTICS
HASTELLOY® alloy B-2 is a nickel-base wrought
alloy with excellent resistance to hydrochloric acid
at all concentrations and temperatures. It also
withstands hydrogen chloride, sulfuric, acetic and
phosphoric acids. The alloy has excellent resistance
to pitting, to stress-corrosion cracking and to knifeline
and heat-affected zone attack. It resists the
formation of grain-boundary carbide precipitates ir
the weld heat-affected zone, thus making it suitable
for most chemical process applications in the aswelded
condition.
Ask for Bulletin H-2006
HASTELLOY® alloy C-22 - a versatile nickelchromium-molybdenum
alloy with better overall
corrosion resistance than other Ni-Cr-Mo alloys
available today, including HASTELLOY alloy C-276
and C-4 and CABOT alloy No. 625. Alloy C-22 has
outstanding resistance to pitting, crevice corrosion
and stress-corrosion cracking. It has excellent
resistance to oxidizing aqueous media including
acids with oxidizing agents, wet chlorine and
mixtures containing nitric acids or oxidizing acids
with chloride ions. HASTELLOY alloy C-22 has
outstanding resistance to both reducing and
oxidizing media and because of its versatility can be
used where "upset" conditions are likely to occur or
in multipurpose plants.
Alloy C-22 also has exceptional resistance to a
wide variety of chemical process environments,
including strong oxidizers such as ferric and cupric
chlorides, hot contaminated media (organic and
inorganic), chlorine, formic and acetic acids, acetic
anhydride, and seawater and brine solutions.
Ask for Bulletin H-2019
HASTELLOY® alloy C-276 has excellent resistance
to pitting, stress-corrosion cracking, and oxidizing
atmospheres up to 1900 deg. F (1038 deg. C). It has
exceptional resistance to a wide variety of chemical
process environments, including strong oxidizers
such as ferric and cupric chlorides, hot
contaminated media (organic and inorganic),
chlorine, formic and acetic acids, acetic anhydride,
and seawater and brine solutions. It resists the
formation of grain-boundary precipitates in the weld
heat-affected zone. Therefore, it too is suitable for
most chemical process applications in the aswelded
condition.
Ask for Bulletin H-2002
Alloy G-3 has excellent resistance to mixed acids,
sulfate compounds, contaminated nitric acid, wet
flue-gas desulfurization scrubber environments and
hydrofluoric acid. The alloy's resistance to the
formation of grain-boundary precipitates in the
heat-affected zone makes it suitable for use in most
chemical process applications in the as-welded
condition.
Ask for Bulletin H-2009
HASTELLOY® alloy G-30 - a high chromium nickelbase
alloy shows superior corrosion resistance ov~r
most other nickel- and iron-base alloys In
commercial phosphoric acid and many complex
environments containing highly oxidizing agents
such as nitric acid.
Ask for Bulletin H-2028
HASTELLOY® alloy X is a nickel-chromium-ironmolybdenum
alloy which has wide use in gas turbine
engines for combustion zone components because of
its exceptional combination of oxidation resistance,
fabricability and high-temperature strength. It is also
used in the chemical process industry for retorts,
muffles, catalyst support grids, furnace baffles, tubing
for pyrolysis operations and flash drier components.
Ask for Bulletin H-3009
HAYNES® alloy No. 25 is a cobalt-base alloy which
combines good formability, wear and corrosion
resistance with excellent high-temperature properties
to 1900 deg. F (1038 deg. C). Alloy No. 25 is generally
stronger than alloy X but is not quite as oxidation
resistant.
Ask for Bulletin F-30,041
CABOT~ alloy No. 625 is a nickel-chromiummolybdenum
alloy with excellent corrosion
resistance, high strength and oxidation resistance. It is
resistant to a wide variety of corrosive media including
phosphoric acid, organic acids, seawater and
pollution control environments. Alloy No. 625 also
resists stress-corrosion cracking, pitting and
intergranular attack. It has high strength up to
approximately 1800 deg. F (980 deg. C) coupled with
good resistance to oxidizing atmospheres.
Ask for Bulletin H-1019
HASTELLOY® alloy G-3 is an improved wrought
version of HASTELLOY alloy G. Alloy G-3 has the
same excellent general corrosion resistance as alloy
G, along with greater resistance to heat-affected
zone attack and excellent weldability. It has
outstanding resistance to hot sulfuric and
phosphoric acids, and withstands the corrosive
effects of both oxidizing and reducing agents and
can handle both acid and alkaline solutions.
4
MULTIMET® alloy is an iron-base alloy for use in
applications involving high stresses at temperatures
up to 1500 deg. F (816 deg. C), and moderate stresses
at up to 2000 deg. F (1093 deg. C). It has good
oxidation resistance, ductility and is readily fabricated.
Its high-temperature properties are inherent and are
not dependent upon age hardening.
Ask for Bulletin H-3010