Factors that affect sand casting costs
There are many factors that will affect
the sand casting costs. Herein, we list some main factors, and hope
these information could be helpful to casting buyers.
1. Pig iron and steel scrap costs
The pig iron and steel scarp are the main materials to
cast iron and cast steel, so
their prices will directly affect the costs of
2. Alloy costs
If your parts need to add alloys such as Cr, Ni, Cu and Mo, then
their prices will be more expensive than normal metal grades.
3. Casting processes
Different casting processes
will largely affect the costs of castings. The cheapest is the
green sand casting
process, then resin
sand casting is more costly, and the pre-coated resin sand
casting process (e.g. hot shell and
core molding process) will be the most expensive process.
4. Resin cost
As for the castings made by resin sand and pre-coated resin sand
casting processes, the resin price will affect the costs of
castings, but it will not affect the green sand casting process.
5. Size and weight of castings
As for the small castings with weight under 1 kg, its price per kg
will be much more expensive comparatively than larger castings since
they will cause more production time and grinding works.
6. Sand cores
If the production to your parts need to use the sand cores, then its
cost will be higher than that without sand cores. It is because the
sand cores need to be produced separately.
7. Other factors
In addition, there are many other factors. The annual demand is
larger, then their prices will be lower. More simple sand castings
will be more cheaper. The material grades will affect the difficulty
of production and heat treatments, so higher material grades will be
more costly. The higher requirements to the surface quality and
casting defects will
cause higher production costs because of rejection ratio. Moreover,
there are other factors such as the machining cost, painting and
Therefore, they are many factors that have influence to sand casting
costs. So, it is inaccurate to estimate its costs just by one
calculation formula. The
foundries need to consider these factors according to the
experience of production and current prices of materials and labors.