Ductile iron with nodular and compact graphite as a rational alternative to malleable cast iron

There is a need for cast irons with combined combination of properties in modern conditions. Such can be provided by ductile iron nodular and vermicular graphite, which essentially hybrid terms microstructure. The article found that graphite its mechanical rational alternative to malleable iron, namely the grade KCh45-6 (GOST 1215-79). Also, ratio nodular/vermicular (70…95/5…30%) was determined, provides data characteristics. Differences pearlite/ferrite hardness are shown, providing KCh45-6.