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Abstract
Precision forgings are now being produced from preforms pressed from steel powders. There are a greater number of factors influencing the choice of alloy composition than in traditional wrought technology. Since strength is frequently controlled by heat treatment, hardenability is of importance. The elements that are most useful in promoting hardenability at lowest cost are manganese and chromium. However, because of their affinity for oxygen they are not the most satisfactory elements for powder making. The author gives the reasoning behind the design of alloys for the powder-forging process. It is shown how mechanical strength and cost are considered to be controlling variables.