China Industry News reporter Meng Fanjun
On December 11, a press conference for sorbite-bearing high-strength stainless steel S600E was held in Beijing and announced to the world a sorbite high-strength stainless structural steel independently developed and named by the Chinese. The future may be green and earthquake-resistant Of the longevity of buildings and marine, petroleum, bridges, ships, towers, wind power equipment and reclamation works to make its due contribution.
According to reports, sorbite high strength stainless steel S600E is a wholly owned subsidiary of Resources International Holdings Co., Ltd. Zhengzhou Yong Tong Steel Co., Ltd. invented and invented a new type of steel. The steel 600MPa yield strength, with greater than 20% elongation, similar to the expansion coefficient of carbon steel, carbon steel is greater than the elastic modulus, resistance to neutral salt spray corrosion performance is more than 150 times the normal carbon steel fatigue test stress cycling 456-256MPa, frequency 98.2Hz Under the conditions, 10 million times without rupture, the surface without exception, even under the conditions of -40 ℃ also showed good impact resistance, impact energy reached more than 40J.At the same time, to solve the engineering application of the connection method, that is, welding and Moreover, the corresponding welding procedures and welding electrodes have been developed, that is, 8.8 to 12.9-grade, large diameter stainless steel bolts with a diameter of 60 mm or less.
In view of the high strength, low yield ratio, high elongation rate and high corrosion resistance of sorbite high strength stainless steel, according to the characteristics of tempered sorbite of its microstructure, after third-party repeated testing and internal and external experts The review found that the steel was named sorbite high strength stainless structural steel, the strength of Japan's highest level today's high-strength seismic steel H-SA700 and Sumitomo Metal BT-HT880 quite.
Since 2017, the relevant standards of sorbite high-strength stainless steel have passed the establishment and release of the State Standardization Management Committee and related societies organizations. Metallurgical Industry Planning Research Institute and Zhengzhou Yongtong Steel jointly established the sorbenite high-strength stainless steel structure Steel group standard writing team quickly respond to the market, followed by new product development, efficient completion of a series of group standards in the project, the preparation and improvement of the draft, solicit opinions, submitting the stage of standardization work and effectively promote the application of the series of standards And promotion.On August 22, 2017, the standard of the group of "Sorbito High Strength Stainless Steel" of China Special Steel Enterprises Association (seven items) was officially released and implemented.
Zhengzhou Yong Tong Special Steel Co., Ltd. is an innovative growth of special steel production enterprises, the development of the patented product (high strength and corrosion resistant structural steel YT410NS) is the use of earth-rich laterite nickel resources developed by the low-cost, cost-effective At present, sorbite high-strength stainless steel has been China Electric Power Research Institute, China Shipbuilding Heavy Industries 713, Makino shares, Zhengzhou Coal Mining Machinery Manufacturing Group, the Naval Design Bureau, PetroChina Pipe research institutes and other customers or trial use of the user's praise, the broad application prospects.