Japan's first semi-stainless steel car Tokyu 5200 Series and all-stainless steel car Tokyu former 7000 Series are certified as Mechanical Heritage No. 51 of the Japan Society of Mechanical Engineers.
As in previous studies, the latter was born from a US technology license. Then lightweight stainless steel cars were developed by domestic technologies and became de-facto standard technology by adopted by national railway cars. It was widely used in 46 prefectures except Okinawa because it was lightweight, no painting, ecological, and economical.
In this study, we focus on the Tokyu former 5000 Series the high-speed and ultra-lightweight steel cars, which was the basis for the development of the 5200 Series, clarified development history of carbody contour technology, and discussed the true value of the industrial heritage based on the TICCIH Nizhniy Tagil Charter.
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