vs Cast Steel
One of our
dandong foundry clients asked me which one is better for
cast iron vs cast steel. I have to
say, no one is better, but just which
one is more suitable to your products.
Firstly, let us know what is cast iron and cast steel.
Cast iron usually refers to
gray iron, ductile iron and malleable
iron, which is iron casting with carbon content upper than 2%.
Cast steel usually refers to normal carbon steel and alloy steel, or called steel casting with carbon content lower than 2%.
Therefore, no big difference considering from the chemical content and raw materials for cast iron vs cast steel. However, their physical properties have many differences.
The advantage and
disadvantage of cast iron:
grey cast iron has good casting
properties, good vibration damping, good
wear resistance, good machinability and
low notch sensitivity. However, its
tensile strength and
elongation are very low, so
grey cast iron is suitable for producing some metal parts with
low mechanical requirements, such as
protective cover, cover, oil pan, hand
wheels, frame, floor, hammer, small
handle, base, frame, box, knife, bed,
bearing seat, table, wheels, cover,
pump, valve, pipe, flywheel, motor
Grey cast iron also has some high grades,
so the grey iron castings with high grades can withstand greater
load, and a certain degree of tightness
and corrosion resistance. Such as cylinder,
gear, base, flywheels, bed, cylinder
block, cylinder liner, piston, gear box,
brake wheel, coupling Plate, medium
pressure valve, etc. More refer to iron-foundry.com.
ductile iron and malleable iron
have higher strength, better ductility,
heat-resistance and toughness than grey iron, so it has a
wider application, in some cases, ductile iron can
replace carbon steel.
production technology is high,
the production process is more complex, so ductile iron castings have more casting
its production cost is higher than grey cast iron. Considering its advantagous, there are many
fields that ductile iron are using for,
such as Pressure pipes and fittings,
Automotive applications, Agriculture,
road and construction applications,
General engineering applications.
The advantage and
disadvantage of cast steel:
One of the advantages of cast steel is
the design flexibility, the designer of
the casting have the greatest freedom of
design choices, especially the complex
shape and hollow cross-section parts.
Cast steel has the metallurgy
manufacturing flexibility and strongest
variability, you can choose a different
chemical composition and control,
adapted to the various requirements of
different projects. By different heat
treatment choice in the larger context
of the mechanical properties and
performance, and good weldability and
Steel castings can be used for a variety
of working conditions, and its
mechanical properties superior to any
other casting alloys, and a variety of
high-alloy steel for special purposes.
To withstand high tensile stress or
dynamic load of components, it is
important pressure vessel castings in
low or high temperature by the large and
important part load key parts, in
principle, should give priority to steel
However, the cast steel has
comparatively bad shake-suction, wear
resistance, mobility and the casting
performance are compared bad with cast
The steel castings made by lost wax investment casting will have better inside and surface quality, but its price will be much higher than ductile iron.
Moreover, the cast iron castings could be made by automatic molding line or shell molding process, therefore, the production rate is much more higher than steel castings. The production leading time will be much shorter.
Cast Iron vs Cast Steel:
Therefore, for cast iron vs cast steel,
they have their own advantages and
disadvantages, you should choose it
according to your application and their
The choosing principle will be:
1. If the gray iron or ductile iron can meet the mechanical and physical properties of your products, then no necessary to consider cast steel.
2. If you prefer the perfect surface quality and dimensional control, then you could consider the steel castings made by silica sol investment casting process, although its price will be very high.
3. If you have very high demand quantity, such as tens of thousands pieces each year, you may need to consider cast iron made by automatic molding or shell molding process.
4. If you do not have high requirement to their mechanical properties, then you can choose gray cast iron, because its price will be the lowest than ductile iron and cast steel.
Main Casting Products|
Cast Iron Plate
Manhole Cover Casting
Warping Head Casting
Ductile Iron Belt Pulley
Cast Iron Flywheel
Boiler Ash Door
Cast Iron Stove Grate
Cast Iron Brackets
Cast Iron Weight
Large Cast Steel Bracket
Cast Iron Drainage Pipe
Cast Iron Pipe Fittings
Burner Grates for Gas Stove
Grey Iron Counter Weight
Cast Iron Axle Support
Cast Iron Blocks
Cast Iron Truck Castings
Cast Iron Tractor Parts
Cast Iron Stove Parts
Pump Shell and Valve Body
Seeding Knife Points
Cast Iron Exhaust Manifold
Cradle Bracket of Cylinder