Systematic materials selection is essential to fulfill the design criteria. Reliable information on material properties, in turn, is a vital factor for approaching such an objective. The machinability of engineering metals, owing to the marked influence on the production costs, has to be taken into account in the process of materials selection. In an attempt to develop a method for estimating the machinability of engineering metals, machinability data collected from laboratory and literature are assessed. A rating system derived from the metal removal rate is proposed for estimating the relative machinability of carbon and alloy steels, stainless steels, and aluminum, copper, and magnesium alloys.
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