Nippon Steel Corporation

Hitachi Zosen Corporation

Koichi Shinada

Hiroshi Tamehiro

Yoshio Terada

Hiroyuki Ogawa

Rikio Chijiiwa

Kenichi Karimine

Motonori Tamura

Tadashi Kasuya

Kyoichi Nagano

Hirohisa Fujiyama

Kazuo Nagatomo

Yoshinori Ogata

Yukihiko Horii

Hajime Ishikawa

Makoto Okumura

Isamu Kimoto

Shigenobu Soneda

Nobuyuki Aoki

Hiroshi Naganuma

Tateo Miyazaki

A wire for gas metal arc welding containing 0.01 to 0.06 wt % of C, 0.10 to 0.60 wt % of Si, 0.9 to 3.1 wt % of Mn, 0.7 to 2.0 wt % of Cr, 0.005 to 0.06% of Ti, not greater than 0.08 wt % of Al and if necessary, 0.05 to 0.30 wt % of Cu, and the balance of Fe and unavoidable impurities. This wire improves the selective corrosion resistance and the low temperature toughness of the resulting weld metal, and is particularly suitable for circumferential welding of line pipes for transporting CO.sub.2 -containing petroleum, natural gases or CO.sub.2.

Line pipe metal arc welded with wire alloy

Method of reducing welding distortion in one side welding for joining

Method of automatically welding rails

A welding flux which forms a weld metal simultaneously satisfying low-oxygen, low-nitrogen, and low-hydrogen contents, gives weld beads in good form, and joins given metal pieces without entailing weld defects is obtained by formulating the flux in a composition such that a four-component system used therein is formed of CaO, MgO, Al.sub.2 O.sub.3, and SiO.sub.2 in the following proportions based on the total amount of the system taken as unity (100%),

Low-hydrogen, low-nitrogen, low-oxygen welding flux

Growing community of inventors

Futtsu, Japan

Koichi Shinada