ACS Alloy Cast Steel Rolls
ACS Alloy Cast Steel rolls are alloyed with nickel, chromium and molybdenum with a carbon content between 0.4% and 1.4% and they are capable of a higher strength and wear resistance than is possible with lower alloy steels. The higher carbon grades in particular are capable of good surface finish.
The rolls undergo a sophisticated multi-stage high temperature heat treatment to give the combination of hardness, toughness and wear resistance required for the particular application. The lower carbon grades will have a structure consisting of ferrite and fine pearlite which, as the carbon content is raised, transitions to a fully pearlitic structure and on to one containing free carbide in a matrix of fine pearlite and even some bainite for the highest carbon grades.
Alloy cast steel can be used in heavy duty applications such as slabbing, blooming and heavy section mills but the improved wear resistance of the higher carbon grades makes them suitable for use in medium section mills as well as roughing rolls for flat products.
The lower Carbon grades, especially, are amongst Hisar’s toughest materials, exhibiting outstanding mechanical properties and low thermal sensitivity.ACS Alloy Cast Steel material has no fall off in hardness with increasing depth.