X 50 is listed in this reference library among the cast cobalt-base "X series" superalloys developed in the mid-20th century alongside the far better documented X-40 and X-45 grades, which were widely used for cast turbine vanes, nozzle segments, and other hot-section gas turbine components. The naming pattern and the material's place in this catalog's superalloy section strongly suggest X 50 belongs to that same historical Co-Cr-Ni-W family of cast alloys.

That said, an exact published chemical composition and formal standard cross-reference (ASTM, AMS, UNS, or DIN) for X 50 specifically could not be independently verified through current technical literature, alloy producer catalogs, or materials databases, despite a thorough search. Rather than publish invented numbers, this page presents the verified general characteristics of the X-series cast cobalt superalloy family and omits an alloy-specific composition table. If you have mill certification data or a producer datasheet for material sold under this designation, FM Carbide's technical team can help cross-check it against known X-series chemistry.

Cast cobalt-base superalloys in the X series - which X 50 is presumed to belong to based on its designation and cataloging - are characterized by a cobalt matrix reinforced with chromium and tungsten carbides. That hard carbide network gives the family its high-temperature strength and wear resistance in service, but it is also what makes these alloys abrasive and demanding to machine: flank wear accelerates quickly wherever the cutting edge engages the carbide phase.

Like other members of this family, an X-series cast cobalt superalloy would be expected to retain hardness at elevated cutting temperature rather than soften, and to work-harden readily under light or interrupted cuts. Until the exact grade is confirmed, the safest approach is to treat the material with the same conservative practices used across the cast cobalt superalloy family: sharp positive-rake ground carbide inserts, steady adequate chip loads, rigid low-deflection setups, and generous coolant.