Ferralloy is producing machined investment castings to the Rc 52 hardness grade of this cobalt based alloy. These bushings are used as orifices by a large international company in the oil drilling equipment industry. This type of material is also being used to produce sleeves for another customer in the valve industry. The sleeves are pressed into their safety relief valves to dramatically reduce wear which occurs when abrasive fluids are pumped through the valves.
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