Why is Grey
Cast Iron So Popular? Properties and Uses
Grey Cast Iron is made by remelting pig iron. It is an alloy of
Carbon and Iron. Small amounts of Silicon, Phosphorus, Manganese
and Sulfur are also present in it. The reasons behind its
popularity are: ability to make complex structures and low cost.
In addition, the excellent properties of Grey Cast Iron have
made it one of the most widely used alloys. Its properties are
High Compressive Strength
This strength is defined by the endurance of any metal or alloy
to withstand its compressive forces. Grey Cast Iron has a high
compressive strength and that’s why, it is widely used in posts
and columns of buildings. In addition, their compressive
strength can be as high as that of some Mild Steels.
There are different varieties of Grey Cast Iron and their
tensile strength varies accordingly. Some varieties show the
tensile strength of 5 tons per square inch, some show 19, but on
an average their strength is 7 tons per square inch. However,
addition of vanadium can increase the strength of Grey Cast
Resistance to Deformation
Grey Cast Iron is highly resistant to deformation and provides a
rigid frame. However, if there is some construction related
problem, then even Grey Cast Iron made structure can breakdown.
Low Melting Point
Grey Cast Iron has low melting point – 1140 ºC to 1200 ºC.
Resistance to Oxidation
Grey Cast Iron is highly resistant to rust, which is formed by
the reaction of oxygen and Iron. It is a perfect solution to
avoid the problem of corrosion.
Now, let’s look at the uses of Grey Cast Iron as per its class.
Uses of Grey Cast Iron:
Class 300 Grey Iron: Can be used in producing heavy-duty machine
tools, bed, presses, high pressure hydraulic parts, frame,
gears, bushings, piston rings, cams, crankshaft, cylinder block,
cylinder head, etc.
Class 200 and class 250 Grey Iron: Can be used in producing
gear, cylinder, base, bed, flywheel, cylinder liners, cylinder
block, pistons, brake wheel, gear boxes, pressure valve,
coupling plate, etc.
Class 100 and class 150 Grey Iron: Suitable for producing cover
body, protective cover, frame, hand wheels, hammer, floor,
handle, box, frame, bed, bearing, pulleys, bench, pump body,
pipe, valve, etc.
For the usage in above applications, quality Grey Cast Iron can
be availed by various Grey Cast Manufacturers online. These
Manufacturers provide the uncontaminated Grey Cast Iron that is
useful for the construction of sturdy products.
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