The component – manufactured by Japanese casting and forging company Kobe Steel – was designated as a \u2018special approved material\u2019 by ClassNK, which recommended it for consideration under IACS\u2019 unified requirements (UR).<\/p>\n
The development of intermediate shafts, which transmit power from the engine to the propeller shaft, has previously been limited by the unified requirements, which specify a maximum strength of 800N\/mm2. High-strength steel is desirable for the components in order to suppress the torsional vibration that results from the low-speed, high-torque rotation design of new large ship engines.<\/p>\n
Kobe Steel – which supplies ship components including built-up crankshafts, solid crankshafts, intermediate shafts and propeller shafts \u2013 can manufacture intermediate shafts of up to 950N\/mm2. Components are inspected and assured using proprietary quality control systems including the automatic ultrasonic testing and, for crankshafts, quantitative digital evaluation of the contact area.<\/p>\n
\u201cUnder IACS unified requirements it is now possible to design intermediate shafts of higher strength,\u201d the company said in a statement. \u201cShafts of the same diameter will be better able to cope with large torsional vibrations [and] intermediate shafts of smaller diameters are also possible, saving on weight.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"
The International Association of Classification Societies (IACS) has approved an intermediate shaft with tensile strength of above 800N\/mm2 for the first time.<\/p>\n","protected":false},"author":8,"featured_media":4006,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"sponsor":[],"class_list":["post-4005","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-propulsion"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts\/4005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/comments?post=4005"}],"version-history":[{"count":1,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts\/4005\/revisions"}],"predecessor-version":[{"id":4007,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts\/4005\/revisions\/4007"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/media\/4006"}],"wp:attachment":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/media?parent=4005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/categories?post=4005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/tags?post=4005"},{"taxonomy":"sponsor","embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/sponsor?post=4005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}