Secondary Operation	Typical Parts	Objectives
Coining Objective	All	Densification, dimensional control
Sizing	All	Dimensional control

Secondary Operation	Typical Parts	Objectives
Resin	Structural	Improve machinability. Prepare surface for plating with other metals. Seal parts gas or liquid tight.

Secondary Operation	Typical Parts	Objectives
Quench and Temper	Ferrous Structural	Improve strength and hardness
Steam treat	Ferrous	Make surface hard and wear resistant. Improve corrosion resistance and seal porosity. Provides a black/blue surface appearance for coloration needs.

Secondary Operation	Typical Parts	Objectives
Drill and Tap	All	To install set or assembly screws.
Turning	All	Machine to exact tolerances. Form undercuts not possible with punch and die tooling.
Milling	All	Form undercuts or slots.
Grinding	All	Remove stock, make faces parallel, and improve surface finish and tolerances.
Honing	All	Improved dimensional control.

Secondary Operation	Typical Parts	Objectives
Deburring	All	Smooths edges related to parting lines.
Burnishing	Ferrous Structural	Ball size, roller burnish for size control and surface finish.
Coating Oil Dip	Ferrous	Corrosion resistance. Lubrication
Copper, Nickel Zinc Plating	Ferrous	Corrosion resistance, appearance.
Welding	Ferrous, 6.8 g/cm min. density	Makes assemblies from two or more parts.
Black Oxide	Ferrous, resin impregnated	Corrosion resistance, paint base.
Mechanical Surface Treatments: Glass Beading Wire Brush, Sanding	All	Clean, improve surface.
Coating	Ferrous	High corrosion resistance.
Tumbling/ Vibratory Finishing, Grit Blasting	All	Improve surface fatigue life.