Precision casting is a technique that is very different from sand casting. The technique is used for casting steel and stainless steel, in particular :
It requires a metal mould for the production of the wax moulds (similar to injection moulding). The obtained pieces in wax are assembled on "trees", coated with ceramic layers, then emptied and baked out. The steel is then poured into these hollow "trees".
Are you looking for a supplier for precision castings?