If you’re looking for an industrial or heavy duty caster, you’ve no doubt come across the term Semi Steel. And, unless you’ve got a background in metallurgy, chances are you’re not sure what it is.
As it turns out, semi steel is actually a type of cast iron, with steel scrap thrown in the mixture for good measure. In fact, most semi-steel has quite a bit of steel scrap in it. The result is an alloy that is excellent for use as casters, for a variety of reasons. Semi steel features easy castability, low cost, and machinability, just as cast iron does. It also has added strength, impact resistance, and ductility from the steel. This makes semi-steel a perfect balance of cost effective strength for many medium and heavy duty casters.