This specification covers the requirements for wrought cobalt-35nickel-20chromium-10molybdenum alloy for use in the manufacture of surgical implants. The alloy shall be manufactured into plates, sheets, and foils in the annealed, cold-worked, or cold-worked and capability-aged condition. The plates may be available in ground or dull finish, while the sheet and foil may be of dull cold-rolled, bright cold-rolled, intermediate polished, general-purpose polished, dull satin finished, high luster finish, or mirror finish. In addition, plate edges may be of rolled edge or approximate square edge, while for sheet and foil, edges may be approximate square edge or an edge produced by slitting or shearing. Heat and product analyses as well as tests for ultimate tensile strength, yield strength, elongation, hardness, and average grain size shall be performed and shall conform to the requirements specified.

1.1 This specification covers the chemical, mechanical, and metallurgical requirements for wrought cobalt-35nickel-20chromium-10molybdenum alloy (UNS R30035) in the form of plate, sheet, and foil to be used in the manufacture of surgical implants.

1.2 Units—The SI units in this standard are the primary units. The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with this standard.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.