power metal auto parts Powder metallurgy is a manufacturing process where various powder metals such as stainless steel, brass, copper, iron and bronze are compressed and then sintered (heated) to increase adhesion between particles. Material blending allows for a certain amount of customization of material properties to produce desired characteristics suitable for a particular application.  The part is formed by compressing the powder metal, or blended metal powders, in accurately formed dies and punches in special types of hydraulic presses. The compressed pieces are then sintered in an atmosphere controlled furnace at high temperatures, causing the metal powder particles to be metallurgically bonded together. This remarkably â??greenâ?� and environmentally friendly process uses 99% of the material thatâ??s in the mold, producing harmless bi-products of nitrogen and hydrogen.