STP1438

    Processing Platinum Enhanced Radiopaque Stainless Steel (PERSS®6) for Use as Balloon-Expandable Coronary Stents

    Published: Jan 2003


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    Abstract

    A platinum-enhanced variant of UNS S31673 stainless steel has been eveloped for use in fabricating balloon-expandable coronary stents. PERSS® is sufficiently radiopaque to be detected by current radiographic methods and maintains compliance with ASTM requirements. Boston Scientific Corporation/Interventional Technologies (BSC/IVT) has implemented a pilot program for the development of PERSS with the intent of achieving vertical integration of the manufacturing process. PERSS ingots containing 5 wt% platinum were cast by vacuum induction melting, refined by vacuum arc remelting, upset in a forge, then hot and cold-rolled into sheet and foil. The sheet was cold-rolled on a 20-high cluster mill to a foil thickness of less than 0.25 mm (0.01 inches). While the final product otherwise meets the ASTM specification for UNS S31673 alloys, intentional addition of unspecified additional elements precludes its compliance with same.

    Keywords:

    coronary stent, stainless steel, platinum, vacuum induction melting, vacuum arc remelting, Sendzimir mill, PERSS


    Author Information:

    Dennis, JZ
    Manufacturing Engineer, Research & Development Engineer, Vice President (R&D), Vice President (Process Development), and General Manager, Boston Scientific Corporation/Interventional Technologies, San Diego, CA

    Craig, CH
    Manufacturing Engineer, Research & Development Engineer, Vice President (R&D), Vice President (Process Development), and General Manager, Boston Scientific Corporation/Interventional Technologies, San Diego, CA

    Radisch, HR
    Manufacturing Engineer, Research & Development Engineer, Vice President (R&D), Vice President (Process Development), and General Manager, Boston Scientific Corporation/Interventional Technologies, San Diego, CA

    Pannek, EJ
    Manufacturing Engineer, Research & Development Engineer, Vice President (R&D), Vice President (Process Development), and General Manager, Boston Scientific Corporation/Interventional Technologies, San Diego, CA

    Turner, PC
    Associate Director for Thermal Treatment Technologies, Albany Research Center, Albany, OR

    Hicks, AG
    Technical Manager, The Arnold Engineering Co., Marengo, IL

    Jenusaitis, M
    Manufacturing Engineer, Research & Development Engineer, Vice President (R&D), Vice President (Process Development), and General Manager, Boston Scientific Corporation/Interventional Technologies, San Diego, CA

    Gokcen, NA
    Consultant, Palos Verdes Estates, CA

    Friend, CM
    Professor and Head, and Senior Lecturer, Cranfield Postgraduate Medical School, Shrivenham, Swindon,

    Edwards, MR
    Professor and Head, and Senior Lecturer, Cranfield Postgraduate Medical School, Shrivenham, Swindon,


    Paper ID: STP11154S

    Committee/Subcommittee: F04.33

    DOI: 10.1520/STP11154S


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