In China, there are many successful cases of shipbuilding steel plate quality control. Here are some typical examples:

Xiangtan Iron and Steel:
High-strength ship plate for large heat input welding: The high-strength ship plate e40-w700 for large heat input welding developed by Xiangtan Iron and Steel has successfully passed the certification of six countries' classification societies, and its various performances have reached the international advanced level. Its maximum thickness is 85mm, and the welding heat input is 700kJ/cm. It can realize one-pass welding, greatly improving the welding efficiency compared with traditional welding. It can also reduce the filling amount of weld metal and reduce the construction cost. This steel plate has been applied to projects such as the construction of large offshore floating production and storage vessels.
Crack arrest steel for container ships: Xiangtan Iron and Steel has obtained the certification of five countries' classification societies including China, the United States, Norway, the United Kingdom, and France. The product has been batch applied to large ship and marine equipment manufacturing enterprises in many countries. The e40/47bca2 large container ship crack arrest steel plate developed by it has a maximum thickness of 85mm. The product quality is stable and provides key material support for the construction of ultra-large container ships.

Nanjing Iron and Steel:
Supplying for "Adora Magic City" cruise ship: The ship plates and ship bulb flats of China's first large cruise ship "Adora Magic City" are exclusively supplied by Nanjing Iron and Steel. Nanjing Iron and Steel has achieved precise control of the thickness tolerance of 4mm thick steel plates, solved the world-class problem of shape and thickness control of wide and thin plates, and laid a material foundation for the localization construction of large luxury cruise ships.
Supplying for "Sun Yat-sen University" scientific research ship: The "Sun Yat-sen University" scientific research ship has strict requirements on steel plate weight control, surface quality, plate shape and internal stress, and the proportion of thin plate orders is high. Relying on its equipment and technical advantages in wide and thin specifications, Nanjing Iron and Steel has met the ship's needs in terms of quantity and time.

 

 

 

Angang:
High-strength and ultra-thick crack arrest steel plate for container ships: Angang has developed a full series of large-thickness ultra-high-strength crack arrest steel plates and passed the certification of multiple countries' classification societies. In 2016, Angang won the supply order for the whole ship's steel for two 20,000-container ultra-large container ships of Dalian Shipbuilding Group Co., Ltd., realizing the first domestic demonstration application of this high-end ship type. Since then, it has exclusively supplied the world's first 24,000-container ultra-large container ship, etc., making important contributions to the construction of "domestic ships with domestic materials" in China.
Supplying for "Capesize Wisdom" intelligent oil tanker: Angang is the exclusive supplier for the world's first 308,000-ton ultra-large intelligent oil tanker "Capesize Wisdom". Angang starts from controlling the thickness of steel plates, precisely controls the thickness tolerance, ensures the loading capacity of the ship's hull by reducing the material weight. Moreover, the coordinated cooperation of production, sales and research of ship plates and the whole system's priority production scheduling ensure the plate shape and meet the ship's requirements for high-quality steel and segmented supply.

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