The Most Common Cast Iron Grades Manufactured in China
The followings are the most common gray
iron and ductile iron grades produced by Dandong Foundry, and also
for the most Chinese foundries.
The most common materials of gray iron
produced by our foundry:
1. ASTM A48 Class. 20 and Class. 25. These grades are low and
easier for production, so they are very common for stove parts, and
low requirement parts. In China, its equivalent grade is HT150. All
iron foundries could produce this grade. It will take about 40% of
total output of gray iron castings.
2. ASTM A48 Class. 30. The equivalent grade in China is
HT200. This material is also very common. As for the parts with a
certain requirements to the tensile strength, this material will be
suitable. It will take about 40% for total gray iron production.
3. ASTM A48 Class. 35. The hardness to this material is
difficult to control, so it will affect the further machining, so
production to this material will be more difficult, therefore, the
small iron foundries will not produce it. It will take about 20% of
our total production.
As for higher grades such as ASTM A48 Class. 40, 45 and 50,
these materials need inoculation process like ductile iron, and need
heat treatment, so only few iron foundries could produce these
grades. Unfortunately, we can not produce these grades. As for
higher grades such as 55 and 60, I really heard any clients required
them, these grades are very rare. Only for special application, I
The most common materials of ductile iron
produced by our foundry:
1. ASTM A536 60-40-18 (and EN-GJS-400-15), there is no 40-15
material in ASTM standard, but is very common in China and Germany
standard. 40-18 and 40-15 are very similar, and just a little
difference for elongation requirement. This material grade is the
most common material for most foundries in China. It will take about
30% for our total ductile iron production output.
2. ASTM A536 65-45-12. This material is also common. In
China, there is an similar equivalent grade QT450-10. It will take
about 10% of total output of ductile iron castings.
3. ASTM A536 70-50-05. This material is also common. It will
take also about 10%.
4. ASTM A536 80-60-03. This material is common, but not many
foundries could produce it. Sometimes, its production costs will be
higher than lower grades. It will take about 10% too, since some
parts need to use this material because its high tensile strength.
The above four grades are the most common grades we are producing,
and also for other iron foundries in China.
As for ASTM A536 80-55-06, although some clients required to
use this material, but there is no equivalent grades in China and
other countries, so it is better not to choose it. The other grades
100-70-03 and 120-90-02 need special heat treatments, so very
difficult to produce. Only few iron foundries in China could produce
these grades, and of course, their prices will be very high.
By the way, as for the equivalent grades for gray iron and ductile
iron. Please refer to our article
Equivalent grades of gray iron, ductile iron, sg iron, nodular