During the earlier phase of the development, the R&D center of Zenith Steel Group designed proper technology parameters, controlled technological difficulties in steelmaking and rolling after researching for some technical information and  deeply capturing of customer's requirements based on the current successful development experience of cold heading alloy steel and the features of the steel. During the manufacture of the steel, the company arranged relevant staffs to follow, observe and summarize the whole process. The R&D center, Steelmaking department, Rolling Department, Quality Control Department and other staffs worked together during the development process and the high strength bolt steel 35VB was developed by one time. After the examination of rolled products, all technical indicators meet the requirements of clients. What’s more, the company has rolled the steel in various standards and now the products has been sent to clients.

We have been told that 35 VB is the steel for the production of high-class Grade 10.9 Steel Bolts which are widely applied to large machines, architecture, electricity and other industry. Because bolts directly transfer alternating load which leads to alternating stress. The bad application environment and high operating stress require good quality of the bolts which directly influences the service life of those machine. Due to these reasons, 35VB must have advantages like high strength, sound plasticity and toughness, high impact tenacity and high fatigue strength. The steel is a new developed high-value-added product which has certain difficulties in producing.

Since 2016, Zenith Steel Group steps up efforts to develop more high-end products based on the “522” development strategy (that is 500,000 tons of steel of super quality, 2 million tons of fine steel and 2 million tons of special steel). According to statistics, the R&D center of the company has developed 27 types of steel, in which 21 types of bar and6 wire rods. The fine steels and special steels have occupied over 50% of all producing steels in the company.

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