Among these are nickel and molybdenum. Ever since the discovery several years back that small percentages of the element boron have a powerful effect in promoting the hardenability of alloy steels, it has been realized that boron could be sub¬stituted in part, at least, for the more strategic alloying elements in steel.nAt the request of the Aeronautical Research Laboratory, Wright Air Development Center, a program was initiated by the Aircraft Gas Turbine Division of the General Electric Company to determine the suitability of boron steel for use in J-47 service engines.
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