Last October Scott Kay introduced his new line of SK-Cobalt with much fanfare comparing the virtues of his BioBlu27 alloy to popular Tungsten Carbide. The assertion made was that Tungsten-Carbide will fracture on hard impact and that Carpenter Technologies BioBlu27, a Cobalt/Chrome alloy, would likely last a lifetime. Both are true and accurate statements. In fact Cobalt / Chrome alloys in the ASTM class of F75 like BioBlu27 have been used for many years by the medical industry and by other…
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