There are a number of ways of describing this highly alloyed type of iron – Chrome Iron, Wear Resistant Iron, Ni Hard or 28% Chrome being the more common ones, along with a range of national and international standards. One side effect of the levels of chrome and nickel used in these grades is that they can have good corrosion resistance which can lead to alternative applications. Also, given the inherently higher melting point of chrome compared to cast iron, they can be used for heat resistant castings, particularly if the carbon content is controlled to the lower end of the permissible range in some of the 28% chrome grades. These heat resistant versions have applications in castings such as fire bars and grate assemblies in stoves.
Alloy Iron Casting