On March 12, the Institute of Metals of the Chinese Academy of Sciences released news that on that day, using the metal construction and forming technology developed by the Institute, the world's largest welded stainless steel ring forging was successfully rolled.The ring has a diameter of 15.6 meters and a weight of 150 tons. For the first time, it has achieved the classification and construction of a 100-ton metal billet. This is also the world's largest and heaviest integral stainless steel ring.

　　With the commission and support of the China Nuclear Group, the Institute of Metals of the Chinese Academy of Sciences set up a production, research, and research team to apply the high purity castings of Taigang. The ring forgings with a diameter of 15.6 meters were developed by Yilaite in Shandong Province. The characteristics are that there is no weld seam as a whole. The degree of homogenization is high. Good tissue uniformity.The giant ring will be applied to the fourth-generation nuclear power plant in China. Its successful development will effectively guarantee the implementation of major equipment in the field of nuclear industry in China.