Whiteheart malleable cast iron

Malleable cast iron is alloy of iron and carbon and other elements and most of the carbon is extracted in the form of graphite flakes which are known as temper carbon. All carbon is in the form of compound Fe3C (cementite). This compound gives us hard casting which mills easiliy during the blow. Because of that, castings go through second phase of production: tempering. This is process of heat-treatment in which cementite is fully decomposing on iron and carbon. In this process carbon is extracted in flakes which are arranged in ferritic or peralitic basis, in which are also resolved certain amounts of alloying elements which define strenght, corrosion resistance, machinability and toughness.
We produce whiteheart malleable cast iron by heat-treatment in controlled oxidizing atmosphere which fully decarburize the casting up to depth of 4 mm. Castings with thicker wall are decarburized partially, only on the surface, while content of carbon in the core stays the same.
After tempering, castings are soft and easily machined.

In RS METALI we produce whiteheart malleable cast iron in following quality: