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SECONDARY OPERATIONS
Any powder metallurgy process creates some porosity. MIM minimizes total porosity and
typically limits interconnected porosity (that porosity connected to a free surface) to
less than 0.2%, regardless of the product's percent of full density. This means standard
coloring and plating techniques can be used without resin impregnation. Oil impregnation
and copper infiltration are not used with MIM. When heat treated, parts can be case hardened
to closely controlled case depths equivalent to wrought material. Other metalworking
techniques such as drilling, tapping, turning, grinding, and broaching work well with MIM.
All parts are barrel finished unless otherwise specified. These guidelines are not absolute,
and are influenced by a number of factors related to part design.
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