Description
HASTELLOY C*4 alloy is a nickel-chromium-molybdenum alloy with
outstanding
high-temperature stability as evidenced by high ductility and
corrosion resistance even
after aging in the ***0 to ***0°F (**9 to ***8°C) range. This alloy
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.
C*4 alloy also
has excellent resistance to stress-corrosion cracking and to
oxidizing atmospheres up to
***0°F (***8°C).
HASTELLOY C*4 alloy has exceptional resistance to wide variety of
chemical process
environments. These include hot contaminated mineral acids,
solvents, chlorine
and chlorine contaminated media (organic and inorganic), dry
chlorine, formic and
acetic acids, acetic anhydride, and seawater and brine
solutions.
HASTELLOY C*4 alloy can be forged, hot-upset, and impact extruded.
Although the
alloy tends to work-harden, it can be successfully deep-drawn,
spun, press formed or
punched. All of the common methods of welding can be used to weld
HASTELLOY C*4
alloy, although the oxy-acetylene and submerged arc processes are
not recommended
when the fabricated item is intended for use in corrosion service.
Special precautions
should be taken to avoid excessive heat input.
UNS Number: N****5
Density: 8.*4 g/cm3 (0.**2
lbs/in2)
Exceptional Properties: corrosion
resistance
