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Powders of erosion-resistant AP-FeCr17Ni8Si6Mn (ZN-6L) and AP-FeCr18Ni9Mo5Si5Mn4Nb (ZN-12M) alloys were developed for high-performance and high-quality plasmajet hard-facing of wear-resistant coatings onto sealing surfaces of power equipment valve parts in lieu of the coating electrodes well-known in the valve industry