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Cast Iron Brackets
Cast
Iron Brackets are the main products of
Dandong Foundry in China. We
have made many types of
ductile iron brackets for
engineering trucks and automotives for
the manufacturers in China and overseas.
Cast iron brackets are usually made by
ductile iron ASTM A536 Class
60-40-18 and 65-45-12. The weights are
from several kilogram to ten kilograms.
Small size to middle size with middle
machining requirements.
Why are most of cast iron brackets made
by ductile iron, not by
gray
iron? It is because cast iron
brackets are used on the trucks and
vehicles, so they have to have good
tensile strength and elongation. Of
course, for the most of civil uses, the
gray iron brackets are also good choices
for the lower costs.
The most suitable casting process for
the cast iron brackets are the
automatic molding line, which
can assure the good quality and large
production rate. The second choice
should be
shell molding process. Although
the price of shell molding is higher
than automatic molding line, the shell
molding has better quality, surface
quality and complex structures. Most
important is, shell molding are suitable
to small volume of cast iron brackets.
The
green sand floor molding is
cheaper, but it is not suitable for cast
iron brackets because of quality issues.
As for the cast iron brackets, the most
important consideration is not the
surface quality, the prices, the
machining precision, the painting, but
the material quality and
inside defects.
The material quality means the tensile
strength, elongation and the nodularity
percentage. Bad materials will cause the
danger in application. The most of
compensation was caused by the material
issues.
The inside defects are also the
important issue for cast iron brackets.
Some positions are easy to have defects.
Most of defects are
shrinkage. Shrinkage is very
harmful for iron brackets. So, you could
inspect them by dissect the castings or
X-ray flaw detector. Some
clients want to inspect the shrinkage by
ultrasonic flaw-detecting machine, but
according to our experiences, the
ultrasonic detectors are not suitable
for iron castings, because they can not
distinguish the low density, shrinkage
and sand holes. Low density is allowable
for a certain level to cast iron
brackets.
The
followings are some cast iron brackets
made by Dandong
Foundry.
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