PYY易游体育官方网站ss YY易游体育官方网站leases

The information on this Web site is presented "as is." Product availability, organization, and other content may differ from the time the information was originally posted. Changes may take place YY易游体育官方网站thout notice.

YY易游体育官方网站’s high-strength intermediate shafts for ships, first in the world to be adopted by international standard

AuguYY易游体育官方网站 4, 2015

YY易游体育官方网站, Ltd.’s high-strength intermediate shaft for ships has been adopted by the International Association of Classification Societies (IACS) under Unified Requirements (UR) for the first time in the world. Japan’s ship classification society, Nippon Kaiji Kyokai (also known as ClassNK), had previously qualified the steel forged product as a “special approved material.”

An intermediate shaft is an important component that transmits power from the YY易游体育官方网站ine to the propeller shaft. Recently, YY易游体育官方网站ines on large ships tend to adopt a low-speed, high-torque rotation design to achieve high output and high efficiency. To suppress torsional vibration in the intermediate shaft that occurs when the YY易游体育官方网站ine rotates at low speed, shafts of high strYY易游体育官方网站th are required.

High-strYY易游体育官方网站th material had reached a limit as under IACS UR, material design for intermediate shafts had a maximum tensile strYY易游体育官方网站th of TS800N/mm².

YY易游体育官方网站th a background in production technology to make highly clean steel in an integrated manufacturing process from steelmaking to final product, Kobe Steel is able to produce high-strength steel up to TS950N/mm². ClassNK gave recognition to YY易游体育官方网站’s intermediate shaft as a special approved material and proposed to the IACS that the material be approved for UR. This led to the high-strength steel being adopted for UR up to TS950N/mm².

Under IACS UR, it is now possible to design intermediate shafts of higher strength. Shafts of the same diameter YY易游体育官方网站ll be better able to cope YY易游体育官方网站th large torsional vibrations. From the standpoint of the same torsional vibration stress, intermediate shafts of smaller diameters are also possible, saving on weight.

YY易游体育官方网站’s casting and forging business supplies numerous ship components including built-up crankshafts, solid crankshafts, intermediate shafts and propeller shafts. These components are all inspected and assured under the highest and unique quality control system including the Automatic Ultrasonic Test (AUT) and quantitative digital evaluation of the contact area of crankshafts. Through these products, YY易游体育官方网站 is contributing to the advancement of the shipping and shipbuilding industries.