Description
Hastelloy C**2 is a versatile
nickel-chromium-molybdenum alloy with better overall corrosion
resistance than other Ni-Cr-Mo alloys available today, including
hastelloy C***6, C*4, and A**5. Alloy C**2 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 acid or oxidizing acids with chlorine ions.
Hastelloy C**2 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.
Hastelloy C**2 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 amd brine solutions.
Hastelloy C**2 resists the formation of grain boundary precipitates
in the weld heat affected zone, thus making it suitable for most
chemical process applications in the as-welded
condition
Applications
Some of the area of present or
potential use for alloy C**2 are: Acetic acid/Acetic Anhydride,
cellophane manufacturing, chlorine spargers, chlorination systems,
circuit board etching equipment, complex acid/chemical mixtures,
fans and blowers, galvanizing line equipment, gas scrubber systems,
geothermal wells, HF furnaces, incineration systems, nuclear fuel
reprocessing, pesticide production, phosphoric acid applications,
pickling system components, plate heat exchangers, selective
leaching systems, sulfur oxide cooling towers, sulfonation systems,
and tubular heat exchangers.
Workability
Hastelloy C**2 can be fabricated
using the same techniques as are used for alloys C***6 or C*4. It
can be welded, forged, hot-upset and impact extruded. Alloy C**2
can also be successfully deep-drawn, spun, press formed or punched,
although the alloy tends to work-harden.
Parts which have been hot formed or severely cold formed should be
heat treated at ***0 °F and rapid quenched prior to final
fabrication or installation.
|
Element
|
Min
|
Max
|
|
Molybdenum
|
*2.5
|
*4.5
|
|
Chromium
|
*0.0
|
*2.5
|
|
Iron
|
2.*0
|
6.*0
|
|
Tungsten
|
2.*0
|
3.*0
|
|
Cobalt
|
*-
|
2.*0
|
|
Carbon
|
*-
|
0.**0
|
|
Silicon
|
*-
|
0.*8
|
|
Manganese
|
*-
|
0.*0
|
|
Vanadium
|
*-
|
0.*5
|
|
Phosphorus
|
*-
|
0.**5
|
|
Sulfur
|
*-
|
0.**0
|
|
Nickel
|
Remainder
|
