Nippon Steel Welding Products and Engineering Co., Ltd.

Nippon Steel Corporation

Japan Metals & Chemicals Co., Ltd.

Masao Kamada

Shuichi Ueno

Yasushi Ishikawa

Nobuo Mizuhashi

Nobuo Araki

Atsuo Onoda

Takeshi Fukui

Shunichi Kikuta

Takeji Kagami

Seiji Hashimoto

Rikiya Takayama

Iwao Yamada

Takumi Nakamura

Takeo Adachi

Koichi Aoki

Hitoshi Nishimura

Kuniteru Suzuki

Shunji Kikuchi

Hirotoshi Ishide

Kazutoshi Suda

Toshihiro Miura

Harutosi Kubota

Yoji Chatani

Kazuo Mori

A gas shielded arc-welding flux cored wire having a steel-made sheath filled with flux. The flux cored wire containing, by weight % based on the total weight of the wire, 1.0% or more Si--Mn ferroalloy powder having a grain size of 212 .mu.m or less; 2.0 to 7.0% TiO.sub.2 ; 0.2 to 1.5% SiO.sub.2 ; 0.1 to 1.2% ZrO.sub.2 ; and 0.01 to 0.3% fluoride (F-converted value). The powder comprises, by weight %, 0.40 to 1.20% C, 5 to 12% Si, 19 to 42% Mn, and the balance of Fe, with Si 2.gtoreq.11.89-2.92 C-0.077 Mn (Equation (1)) satisfied.

Gas shielded arc-welding flux cored wire

An object of the present invention is to provide an iron base Si--Mn alloy or an iron base Si--Mn--Ni alloy which can be easily crushed and can be manufactured in large quantity, and alloy powder thereof. An iron base Si--Mn--Ni alloy having good crushability and alloy powder thereof, comprising:

Iron base Si--Mn alloy or iron base Si--Mn--Ni alloy having good

A flux cored wire for gas shielded arc welding with a mixed gas comprising argon and carbon dioxide which comprises:

Flux cored wires for gas shielded arc welding

Methods for manufacturing tubes filled with powdery and granular

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Kazo, Japan

Masao Kamada