Our Business and Technology
Supporting the lives of people around the world as a leading pipe company
Steel Tube Business
Our main business is the manufacture of tubes made from ordinary steel and stainless steel.
Carbon Steel Tube (Welded Carbon Steel Tube)
This has been our business since the founding of our company. We use steel strip (coil) as the raw material and manufacture it by high-frequency welding. It is used in a wide range of fields such as housing, buildings and automobiles, and plays an important role in supporting Social infrastructure. In addition, the manufactured pipes are sold by our company and Maruichi Kohan Co., Ltd.'s sales and marketing bases located throughout the country from Hokkaido to Okinawa.
Stainless Steel Tube
Seamless Stainless Steel Tube
This is a stainless steel tubes with no welds that is resistant to high pressure and corrosion. It is mainly used in chemical plants, semiconductor factories, and for piping of hydrogen and ammonia.
Welded Stainless Steel Tube
Like ordinary steel welded tubes, they are manufactured from steel strips (coils) using high-frequency welding, laser welding, and TIG welding. They are primarily used in plant piping and automobile mufflers.
Surface-treated Steel Sheet Business
We produce steel sheets with excellent corrosion resistance and appearance by pickling, cold rolling and hot-dip galvanizing.
Special Products Business
In order to create brighter and safer cities, we design, manufacture, and sell road lighting poles, traffic light and sign poles, ETC gantries, and other products under the "Maruichi Pole" brand.
Maruichi Pole, which is used on roads and facilities throughout the country, is a trusted brand with 60 years of history and will continue to meet your expectations and requests.
Other Business
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Steel Tube Processing Business
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Deformed Tube Business
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Light Gauge Steel Business
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Domestic
Maruichi Steel Tube Ltd.
(Including Hokkaido Maruichi Steel Tube Ltd. Co., Ltd., Shikoku Maruichi Steel Tube Ltd. Co., Ltd., Kyushu Maruichi Steel Tube Ltd. Co., Ltd., Kasuga Kogyo Co., Ltd., and Okinawa Maruichi Co., Ltd.)
Ordinary steel welded tubes business (for construction and automobiles) Stainless steel welded tubes business (for automobiles) Surface-treated steel sheet business Specialty products business
Maruichi Kohan Ltd.
Ordinary steel welded tubes business (sales)
Maruichi Stainless Tube Co., Ltd.
Stainless steel seamless tubes business (for piping, semiconductors, and automotive BA precision thin pipes)
Alpha Metal Co., Ltd.
Steel Tube Processing Business
Toyo Superior Steel Tube Works, Ltd.
Deformed Tube Business
SATO KATAKO SEISAKUSHO CO.LTD.
Light Gauge Steel Business
Overseas Group Companies
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Maruichi Leavitt Pipe & Tube, LLC (Leavitt)
Ordinary steel welded tubes business (for construction and automobiles)
5
MARUICHI NEBRASKA TUBE, LLC（MNT）
Ordinary steel welded tubes business (for construction)
6
Maruichi Stainless Tube Texas Corporation（MST-X）
Stainless steel seamless tubes business (BA precision thin pipes for semiconductors)
7
MARUICHIMEX S.A. de C.V. (MMX)
Ordinary steel welded tubes business (for automobiles) / Stainless steel welded tubes business (for automobiles)
8
Alphametal Mexico S.A. de C.V.(AMX)
Steel Tube Processing Business
9
Maruichi Sun Steel Joint Stock Company (SUNSCO)
Surface-treated steel sheet business / Normal steel welded tubes business (for construction)
10
Maruichi Sun Steel (Hanoi) Company Limited (SUNSCO Hanoi)
Ordinary steel welded tubes business (for automobiles) / Stainless steel welded tubes business (for automobiles)
11
MARUICHI KUMA STEEL TUBE PRIVATE LIMITED (KUMA)
Stainless steel welded tubes business (for automobiles)
12
PT.Indonesia Steel Tube Works(ISTW)
Ordinary steel welded tubes business (for construction and automobiles) / Stainless steel welded tubes business (for automobiles)
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MARUICHI PHILIPPINES STEEL TUBE INC.(MPST)
Ordinary steel welded tubes business (for construction and automobiles) / Stainless steel welded tubes business (for automobiles)
