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Shanghai University Successfully Develops the World's First Grade 19.8 Bolt
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2021-12-08
After more than a year of trial and error, the team working on high performance steel at Shanghai University of Material Science and Engineering worked with 7 other collaborators, and successfully developed the world's first Grade 19.8 ultra-high strength bolt dubbed as the world's strongest fastener. By optimizing the material and heat treatment, the Grade 19.8 bolt achieves a tensile strength of 1900~2070MPa under room temperature. A shear test compliant to GJB 3376-1998 standard reveals the bolt's shear at 115KN. A room temperature tensile fatigue strength test compliant to GJB 3376-1998 and GJB715.30A-2002 standards reveals that the bolt didn't break during the test and didn't crack on the bolt's surface and threads after its removal. This newly-developed ultra-high strength bolt can meet requirements with its combined performance.
Shanghai University of Material Science and Engineering
Grade 19.8
ultra-high strength bolt
上海材料學院
19.8等級
超高強度螺栓
扣件
國際展會
惠達雜誌
匯達實業
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波蘭克拉科夫螺絲展
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德國司徒加特螺絲展
wire Dusseldorf
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