常石鉄工 Product Lineup

We would like to introduce the "Environmental Recycling Business" conducted by Choshu Steel Co., Ltd. Utilizing molten steel from electric furnaces that melt iron scrap, we carry out thermal recycling of industrial waste and safely treat hazardous industrial waste to render it harmless. Through proper treatment and harmlessness of waste, we contribute to environmental conservation in the local community. Additionally, our company also handles exhaust gas treatment and conducts regular environmental measurements to confirm the characteristics and harmlessness of asbestos. 【Features】 ■ Implementation of thermal recycling of industrial waste ■ Melting and harmless treatment of waste asbestos, etc. ■ Treatment of unburned gas that could not be completely combusted in the electric furnace ■ Monitoring of exhaust gas temperature, nitrogen oxides, sulfur oxides, etc., using measuring instruments *For more details, please refer to the PDF materials or feel free to contact us.

• Hazardous material processing
• others

At Choshitetsuko Co., Ltd., we manufacture "cast steel." We possess an external refining furnace that heats and refines molten steel, removing impurity elements such as sulfur and non-metallic inclusions. Through precise component adjustments, we have achieved the production of high-purity and large cast steel products. Additionally, by utilizing our own quay, we are able to export not only domestically but also internationally. 【Machinery and Equipment (Partial)】 ■ Electric furnace main body ■ Electric furnace control room ■ Electric furnace charging crane ■ Emission spectrometer ■ X-ray fluorescence analyzer *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

In the construction industry of Choshitetsuko Co., Ltd., we specialize in the manufacturing and installation of bridges, particularly in the production and installation of floating bridges and pedestrian bridges that require maritime transportation. Additionally, we leverage our years of experience and design technology to focus on the maintenance and repair of existing bridges, as well as seismic reinforcement work. We have various achievements, including pedestrian bridges and overpass bridges. Please feel free to contact us when you need our services. 【Examples of Achievements】 ■ Pedestrian Bridges ■ Overpass Bridges ■ Crossing Bridges ■ Floating Structures *For more details, please refer to the PDF materials or feel free to contact us.

• Contract manufacturing
• Other contract services

At Choshitetsuko Co., Ltd., we are engaged in a business that handles "pipes." We have a 4-point automatic welding machine, pipe coasters (MAX. 700A), pipe benders (MAX. 200A), and a pipe warehouse, enabling us to achieve high quality, low cost, and emergency response. Additionally, at our Kusabuka pipe factory, we possess a variety of machinery, including an elbow angle cutting machine, a slant cutting machine (HK-700CNC), and a roofed gantry crane, as we work on our business. 【Machinery and Equipment (Partial)】 ■ Pipe Benders (Type 2, Type 4, Type 6, NC Type 6, Type 8) ■ Pipe Coaster (HID-600MTS) ■ Pipe Two-Electrode Welding (Open Chuck Type) ■ Pipe Gas Cutting Device ■ Pipe Welding Device *For more details, please refer to the PDF materials or feel free to contact us.

• Contract manufacturing

Choshu Steel Co., Ltd. has machinery and equipment such as stern tube boring machines and rudder boring machines, and is engaged in "installation work." Focusing on engine installation finishing work, we also handle a wide range of tasks including the installation finishing of main engines, shaft systems, and rudders, as well as various types of marine boring work (on-site processing) and the installation and operation of equipment in the engine room. We dispatch excellent engineers to our three overseas factories to manage and guide the site. 【Machinery and Equipment】 ■ Stern Tube Boring Machines - 3 units in Japan, 6 units overseas ■ Rudder Boring Machines - 2 units in Japan, 2 units overseas *For more details, please refer to the PDF materials or feel free to contact us.

• Contract manufacturing

Our company has various machinery and equipment and is engaged in the manufacturing of "canned products." In rudder structure production, we achieve high precision and high quality through our unique rudder boring machines, significantly contributing to shortened construction periods and cost reductions. Additionally, in the production of stand frames, we possess a special technology called "flexible steel," which allows for three-dimensional bending. In finishing, we also have advanced fitting techniques that achieve precision of less than 0.01 mm. We are involved in the production of a wide range of structures, both on land and at sea. 【Machinery and Equipment (Partial)】 ■ Headquarters Factory - NC ladder processing machines No. 1, No. 3, No. 4 - Jib crane - Overhead crane - Gantry crane *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce "machining" conducted at Nagashi Steel Works Co., Ltd. The machining factory at our headquarters has one of the top domestic production volumes for marine shaft systems (propulsion shafts/intermediate shafts/rudder stocks). Utilizing our technological capabilities, we achieve high precision, high quality, shortened lead times, and cost reductions. Additionally, at our Wakamatsu machining factory, we have four large machining machines, primarily handling large-shaped and heavy items. We can accommodate finishing processes for not only cast steel products but also fabricated products. 【Machinery Equipment (Partial)】 ■ Headquarters Factory - Conventional Lathe (LL20) - NC Conventional Lathes (LL15, LL10, LL14, LL6, L8.5NC, L12NC, LL4) - CNC Small Lathe (TAC-510) - Small Lathe (LM) - Planomiller (NCPM) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

Our company is challenging itself to manufacture various structures, both on land and at sea. In the field of stand frames, we possess a special technology called "flexible steel" for three-dimensional bending, and we also have advanced fitting techniques that achieve precision of less than 0.01 mm in finishing. Additionally, at our block factory, we have NC plasma cutting machines, shaped steel FB robotic cutting machines, bending presses, and automatic welding machines, enabling us to achieve shorter construction periods and cost reductions through integrated manufacturing within the factory. 【Business Activities】 ■Machining ■Manufactured products ■Installation work ■Pipes ■Bridges, etc. *For more details, please download the PDF or feel free to contact us.

• Contract manufacturing