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Materials
/ GJS
Cast iron with spheroidal
graphite is a high grade material which combines
the advantages of cast steel and grey cast iron.
It is similar to steel in terms of strength and
elongation to fracture but combines these advantages
with good damping performance and outstanding machinability.
In cast iron with spheroidal graphite the bulk of
the carbon is in the form of spheroidal graphite
particles. The variations in the properties of unalloyed
and low-alloyed cast iron with spheroidal graphite
are achieved by varying the structure of the metallic
matrix. It has a strength of between 400 MPa and
800 MPa. The range of properties can also be extended
by heat treatment after casting. For example, inductive
hardening of pearlitic grades is one possibility.
The ADI group of materials (austempered ductile
iron or ausferritic ductile iron) can be produced
from cast iron with spheroidal graphite by a special
heat treatment as well.
Techn.
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