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QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
1. HT950 950 MPa 1 6) Fig. 1 HxD H [m] D [m] 7 10) [ 28 p. 296-304 (2010)] Recently, high strength steel plate such as 950MPa class strength is focused as material of hydropower plant due to its effect on cost reduction and it has been already used to penstocks in Kanna-gawa and Omaru-gawa hydropower plants in Japan. However, it comes to issue that welding restrictions for preventing welding cracks and keeping strength are much severer than ordinary strength steel, for example, preheatdoi:10.2207/qjjws.28.296 fatcat:qxm2xyjd7nbyrhzn6kaku4tuzm