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<\/p>\n","protected":false},"excerpt":{"rendered":"A German manufacturer of a waterproof and submersible prosthesis knee and foot system, WEIGEL+ medical, required a strong fastener that had excellent corrosion resistance to ensure it could cope with being submerged in seawater.<\/p>\n
The \u2018All Terrain Knee\u2019 and the \u2018Niagara Foot\u2019 can be used in aquatic environments as they purely work mechanically. However, this requires that all components are resistant to saltwater, including the screws.<\/p>\n
WEIGEL+ began using BUMAX\u00ae SDX (Super Duplex) 109 screws. Super duplex stainless steel fasteners are unique as they combine super high strength with excellent corrosion resistance compared with alloy steel fasteners, which would have corrosion issues if exposed to seawater.<\/p>\n
\u201cWe tried a variety of stainless steel screws when developing the waterproof knee joint, but BUMAX\u00ae SDX 109 was the only screw that provided both the strength and corrosion resistance we required,\u201d explains Jochen Weigel, owner of WEIGEL+ medical and co-owner of DOI ortho-innovativ.<\/p>\n
Duplex Stainless Steel is a family of stainless steel that has a two-phase microstructure containing Ferrite and Austenite. BUMAX\u00ae Duplex grades achieve their high strength from cold working such as cold heading and thread rolling.<\/p>\n
\u201cBUMAX\u00ae SDX 109 is from our high strength Super Duplex fastener range and provides excellent mechanical properties, and exceptional resistance to general crevice, pitting and stress corrosion,\u201d says Klaus Vogt, Business Development Manager at BUMAX. \u201cDue to their high levels of chromium and molybdenum, super duplex grades provide even greater corrosion resistance than duplex grades.\u201d<\/p>\n
Super Duplex stainless steel offers very good resistance to general and pitting corrosion due to its high Pitting Resistance Equivalent (PRE) number. The higher the PRE number, the more resistant the steel against pitting corrosion is in seawater and chloride induced corrosion. Super Duplex grades are also well known to possess excellent stress corrosion (SCC) resistance in chloride environments, even in its high strength strain hardened condition.<\/p>\n
The \u2018Niagara Foot\u2019 was designed by Prosthetist Rob Gabourie and the \u2018All Terrain Knee\u2019 knee joint was developed by a team with the scientist Jan Andrysek and Brandon Burke, who lost his leg himself at the age of 18. Together with the Fraunhofer Institute, WEIGEL+ medical and DOI ortho-innovative brought the foot and knee joint to series production.<\/p>\n
WEIGEL+ medical (development and manufacturing) and DOI ortho-innovativ (distribution and education) works with the German international aid agency \u2018Ein Herz f\u00fcr Kinder\u2019 and is committed to simple prostheses for use in all climatic conditions. The fact that the prosthetic knee is purely mechanical and foot is durable in any environment makes it the perfect solution for the developing world. In this sense, BUMAX\u00ae SDX 109 screws contribute to providing prosthesis solutions to people all around the world.<\/p>\n
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Demanding customer application A German manufacturer of a waterproof and submersible prosthesis knee and foot system, WEIGEL+ medical, required a…<\/p>\n","protected":false},"author":1,"featured_media":3597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-3593","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-customer-case","market_segment-general-engineering"],"yoast_head":"\n