Lost-wax investment casting process for steel parts

Lost-wax investment casting is typically chosen for many components, due to it's fine surface finish, 
thin walls, near-net shape into the internal or external features, less or none machining, high production
rate, significant cost saving in material, labor, machining, etc.

Developing investment castings involves creating an original wax model, coating the image with plaster and
building of successive layers until a strong shell envelops the model. After melting out the wax, molten metals
will be poured into the mold, creating a perfect duplicate of the original wax pattern.
Compared to machining apart, investment casting can economically offer undercuts, high definition, complex detail
and a smooth surface finish.

The normal used materials for the investment lost-wax casting are the stainless steel, carbon steel, alloy steel,
etc, some other material like aluminum, bronze, gold, can be used too.
Weight of the single part can be as small as couple or dozens of grams, also as big as hundred of kilo grams.

Investment casting are mostly used for the steel components, which are used for many industries around our life.