Grey Cast Iron
High resistance to abrasion with good dampening characteristics
Grey cast iron is the most frequent used iron-carbon alloy. Its unique characteristic is its high abrasion resistance and its good pouring capability. Also the material is easy to process and it dampens extremely well mechanic vibrations. The reasons for these physical characteristics lie in the structure of the cast iron. Carbon in grey cast iron is found in blades, which form three-dimensional ramifications. Yet, this bladed graphite is also responsible for the very low ductility of the material.
Ni-Resist / austenitic cast iron
High resistance to corrosion and not magnetisable
If one needs high resistance to corrosion, e.g. against the influences of sea water or against alkaline mediums, then the material Ni-Resist is highly suitable. Further Ni-Resist, also called austenitic cast iron, is non-scaling, resistant to erosion and is not magnetisable. The reason for these characteristics is the high share of nickel of more than 20 per cent. Thus, Ni-Resist is often used in the areas of food industry, shipbuilding and medical engineering. Examples for construction parts made of this material are pumps, valves, furnace parts, sockets, piston rings, compressors, turbo-charger casings, exhaust manifolds.
Spheroidal graphite iron
High ductility and great tensile strength
Spheroidal iron shows high ductility. And even more. It possesses an extremely high solidity, which is partly even higher than ductile and steel cast iron with identical ductility values. An additional advantage of the material: through further alloying we can further improve abrasion resistance, heat and corrosion resistance. Also for this the reason of the material characteristics lies in the structure of the iron-carbon alloy. The graphite shows a structure in the form of a small ball within the cast iron. Thus, spheroidal iron is also referred to as spherulitic graphite cast iron.
