Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SAKAI Tadamichi,Estimation of Hydrogen Attack Limit of 21/4Cr-1Mo and 3Cr-1Mo Steels,Tetsu-to-Hagane,00211575,The Iron and Steel Institute of Japan,1985,71,8,1017-1024,https://cir.nii.ac.jp/crid/1390282680159742080,https://doi.org/10.2355/tetsutohagane1955.71.8_1017