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Document Designation and Title Year Select Item(s) B639 Standard Specification for Precipitation Hardening Cobalt-Containing Alloys (UNS R30155 and UNS R30816) Rod, Bar, Forgings, and Forging Stock for High-Temperature Service 02(2008) B639 Standard Specification for Precipitation Hardening Cobalt-Containing Alloys (UNS R30155 and UNS R30816) Rod, Bar, Forgings, and Forging Stock for High-Temperature Service 02 B639 Standard Specification for Precipitation Hardening Cobalt-Containing Alloys (UNSR30155 and UNS R30816) Rod, Bar, Forgings, and Forging Stock for High-Temperature Service 97