Nippon Steel Corporation

Naoyuki Seriu

Minoru Amano

Akira Nakashima

Hideshi Sato

Syunsuke Goto

Shogo Kanazawa

Takashi Otsubo

Kazunari Yamato

Susumu Nakazawa

Tohru Watanabe

Hydrogen in a metal, particularly in a welded metal, can be quantitatively measured by a simple apparatus using sequence control or computer control. The lower limit of hydrogen to be measured according to this invention is much lower yet is more accurate as compared with the prior mechanism of this field.

Method for automatic quantitative measurement of hydrogen in a metal and

A welded steel product having a low sensitivity to weld cracking, produced by welding a base steel material comprising at least one member selected from the group consisting of rare earth metal, Ca, Ba, Te and Se using a welding material comprising at least one member selected from the group consisting of rare earth metals, Te and Se, and having a weld metal containing at least one rare earth metal in an amount of 0.0005 to 0.10% and at least one of Te and Se in an amount not more than 0.10%.

Welded steel products having low sensitivity to weld cracking and a

Growing community of inventors

Machida, Japan

Naoyuki Seriu