May 15, 2024

Nippon Steel Corporation
Nippon Steel Welding & Engineering Co., Ltd.
Nippon Steel Bolten Co., Ltd.

Under the official development assistance (ODA) project funded by the Japanese government for the Republic of Vanuatu, “Project for the Disaster Restoration of Teouma Bridge,” Nippon Steel Corporation, Nippon Steel Welding & Engineering Co., Ltd., and Nippon Steel Bolten Co., Ltd. (Hereinafter referred to as the “NSC Group”) delivered coating cycle extension steel CORSPACE™ (hereinafter referred to as “CORSPACE”)-based steel plates (SM490YB-CORSPACE, etc.), welding materials (SF-1・PX, etc.), and high-strength TC bolts (S10TCR) to Dai Nippon Construction Co., Ltd./Yokogawa Bridge Corp. This is the first time CORSPACE has been adopted for overseas bridge construction.

CORSPACE is made by adding tin (Sn) to steel, and the amount of steel corrosion and the area of paint stripping in the coating film defect part are significantly reduced compared to conventional steel under the same coating conditions/use environment. In addition, it is a steel product that can extend the coating repainting cycle and thereby achieving life cycle cost reduction.
The NSC Group will continue to actively deploy CORSPACE to ODA road (bridge) development projects to contribute to the export of “high quality infrastructure” that can contribute the development of developing countries by utilizing Japan’s advanced technologies, which is an important measure of the Japanese government.

[Outline of project]

• Project name: Project for the Disaster Restoration of Teouma Bridge
• Location of construction: Port Vila, Republic of Vanuatu
• Outline of construction: Bridge replacement (bridge length of 58 m, two-lane, coating cycle extension steel CORSPACE is adopted for steel girder sections)
  River improvement (revetment work of 502.5 m), Approach road improvement (two-lane of 562 m)
• Orderer: Ministry of Infrastructure and Public Utilities, Government of Vanuatu
• Design company: CTI Engineering International Co., Ltd./Kokusai Kogyo Co., Ltd.
• Prime contractor: Dai Nippon Construction
• Primary subcontractor: Yokogawa Bridge Corp. (fabrication and erection of steel girders)
• Project budget: 2.362 billion yen (ODA grant amount of 2.287 billion yen)
•  Estimated completion date: September 30, 2025
  

(Reference)
◆Technical report on development technologies   
   https://www.nipponsteel.com/en/tech/report/nssmc/no110.html
◆Product page   
   https://www.nipponsteel.com/en/product/plate/list/06.html

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