Cast Iron Pricing Experience
Many buyers are confused about cast iron
pricing issues, especially to gray iron and ductile iron. Pricing
iron castings is a complex work, which needs experience and learning
about the materials, production processes and some price
information. Herein, we listed some main aspects of cast iron
pricing, and hope to be helpful for the buyers to evaluate their
1. Cast Iron Materials
Cast iron includes grey iron, ductile iron, malleable iron etc.
Different cast irons will have different prices. Each types of cast
iron has some different grades, so different grades may have
different prices too.
Normally, grey iron will be cheaper than ductile iron, and ductile
iron will be cheaper than malleable iron.
As for the same type of cast iron, the low and middle grades will
have the same prices, but high grades will cause higher production
costs. As for the cast iron grades, please refer to our article "Cast
The material and its grade is only one factor for pricing. You have
to consider the following factors.
2. Iron Casting Production Processes
Different casting production processes will cause large difference
to the casting quality, such as tolerance, surface smoothness,
casting defects etc. At the same time, they will cause the large
difference to the prices too.
For example, the green sand will be cheapest, the resin sand will be
more expensive, shell molding process will be more costly than resin
sand. The casting processes should be selected by the characters of
iron casting parts, and requirements.
You should ask your supplier to denote the casting process they will
use for your parts, and you should check if their selection is
suitable or not.
3. The Unit Weight of Rough Castings and Machined Castings
In the foundry industry in China, all production costs are
calculated according to the unit weight, especially based on the
weight of rough castings. The rough casting weight is heavier, then
all production costs such as raw materials, manpower, electricity,
alloy will be more.
However, the unit weight of rough castings is affected largely by
the machining allowance. So, it is difficult to calculate the
accurate weight by the suppliers according to the drawings.
Therefore, as the buyer, you should try to get the accurate weight
information, rough castings or finish parts after machining, then
this will be helpful for the suppliers to quote an accurate price
If the buyer and supplier do not care about the unit weight during
pricing stage, then you will face a price adjustment before
production. It will be an awkward situation. So, it is better to
make it clear and accurate during pricing stage.
4. Coating, Packing, Heat Treatment and Machining Costs
Cast iron pricing also needs to consider the coating, painting types
and costs, packing costs.
If it is an iron parts needed special heat treatment, such as
quenching, interior stress relieving, then the heat treatment costs
will need to be consider.
If it is a iron part that needs machining works, then machining
costs will be needed to consider. Machining cost is difficult to be
evaluated, unless you have very rich machining experience.
5. Annual Demand
The annual demand is also an important issue during pricing. If your
annual demand is very large, then all prices could be reduced some,
because it is a big project for suppliers. However, if your annual
demand is small, then all prices will be higher than normal.
These five aspects are the main issues that you need to consider
when you price the iron castings. If you find other technical
requirements on the drawings, such as hardness, nodularity rate,
nondestructive inspection, rough casting dimensional tolerance
degrees, casting defects requirements etc. You need to check if your
suppliers have considered and can meet these requirements,
otherwise, the quotation will be insufficient or meaningless.
Tips: I guess many buyers still can not handle
these aspects and make an accurate price evaluation. So, we are
updating an cast iron price list on our website of Dandong Foundry.
These prices are showing the current gray iron, ductile iron and
carbon steel prices per kg without machining. Hope these information
could be helpful for you.