<P> Ductile iron , also known as ductile cast iron , nodular cast iron , spheroidal graphite iron , spheroidal graphite cast iron and SG iron , is a type of graphite - rich cast iron discovered in 1943 by Keith Millis . While most varieties of cast iron are weak in tension brittle , ductile iron has much more impact and fatigue resistance , due to its nodular graphite inclusions . </P>
<P> Ductile iron , also known as ductile cast iron , nodular cast iron , spheroidal graphite iron , spheroidal graphite cast iron and SG iron , is a type of graphite - rich cast iron discovered in 1943 by Keith Millis . While most varieties of cast iron are weak in tension brittle , ductile iron has much more impact and fatigue resistance , due to its nodular graphite inclusions . </P>
in sg iron graphite will be in the form of
in sg iron graphite will be in the form of
cast iron
cast iron