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The technologies being employed by powder metal manufacturers have been developed to a level that allows for high performance power transfer in gearing. The merger of improved metallurgical and dimensional capabilities has resulted in the ability to produce gears with high strength and impact response and a degree of dimensional refinement for an AGMA class 10 or better.

The effect of high density on critical performance properties for stainless steel powder metal (P/M) has been studied. Sinter-Hot Isostatic Pressing (HIP) cycles were optimized to yield stainless steel P/M samples with density levels of 94% to 98% of theoretical density. These samples were then tested for corrosion resistance, stress-rupture strength, tensile strength and toughness. Conventional-density stainless steel P/M samples and wrought samples, when possible, were tested simultaneously to provide a direct comparison. The high density stainless steel P/M samples consistently perform better than those at conventional density levels and exhibit properties that are very close to those of wrought material.