China develops homegrown polar steel for extreme arctic conditions
2026-06-18 14:38:27 [Print]
After more than two years of intensive technical collaboration, the Polar Research Institute of China, China Classification Society (CCS), and a number of domestic steelmakers overcame key challenges in developing high-strength steel for polar-class vessels, with domestically produced "polar steel" now officially rolled out. Relevant mills have already initiated the certification process for polar marine high-strength steel. Among them, Baoshan Iron & Steel Co., Ltd. becomes the first manufacturer to secure CCS certification for its polar-grade high-strength steel product.
The new polar steel solves the critical issue of cold brittleness. Through the addition of special elements such as nickel and molybdenum, combined with precision rolling processes, the material achieves exceptional toughness--remaining ductile and fracture-resistant even in extreme cold as low as minus 60°C. Beyond its frost-resistant properties, polar steel is also engineered for durability. Arctic sea ice is notoriously hard and thick, subjecting vessels to constant crushing and impact during navigation. This new steel is designed to withstand repeated impact forces, while also being thinner and lighter than conventional alternatives--enhancing both performance and fuel efficiency for polar-going ships.
The new polar steel solves the critical issue of cold brittleness. Through the addition of special elements such as nickel and molybdenum, combined with precision rolling processes, the material achieves exceptional toughness--remaining ductile and fracture-resistant even in extreme cold as low as minus 60°C. Beyond its frost-resistant properties, polar steel is also engineered for durability. Arctic sea ice is notoriously hard and thick, subjecting vessels to constant crushing and impact during navigation. This new steel is designed to withstand repeated impact forces, while also being thinner and lighter than conventional alternatives--enhancing both performance and fuel efficiency for polar-going ships.
