Seal rings for potable water applications
AssigneeSandvik AB
InventorsStefan Ederyd, Emmanuel Pauty
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Abstract
A cemented carbide seal ring has at least one hard phase in a binder phase based on Co, Ni and Fe which results in a content Fe, Ni and Cr of less than 50 μg/l of each in a leach test with deionized water at 85° C. performed according to the requirements of British Standard BS6920: Section 2.6: 1996.
Claims22
A corrosion resistant seal ring comprising a hard phase and a binder phase, the ring having a composition comprising Fe, Ni and Cr such that a high resistance to leaching is provided such that less than 50 μg/l of each of Fe, Ni and Cr leaches into deionised water at 85° C. when subjected to the procedure set forth in British Standard BS6920, Section 2.6, 1996.
A seal ring formed at least in part from a material comprising a hard phase and a binder phase, the binder phase comprising 35-45 wt. % Fe.
Dependencies are inferred from the claim text.