Bolt performance grade
Datetime:2018.01.26 From:HanDan HaoQiang Fastener Manufacturing Co.,Ltd
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The performance grade of the bolt, that is, the performance grade of the bolt for steel structure, is divided into 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9, etc. in which the 8.8 and above bolts are made of low carbon alloy steel or medium carbon steel and are treated by heat treatment (quenching and tempering), collectively called high strength bolts, and the rest are commonly known as ordinary snail. Suppository. The bolt grade is composed of two parts, that is, the nominal tensile strength of the bolt material and the ratio of yield to strength. Handan Haoqiang Fastener Manufacturing Co., Ltd. is a large enterprise integrating manufacturing, research and development, sales and service of fasteners. The company is located in the north of Handan, close to the Beijing-Shenzhen Expressway, Beijing-Guangzhou Railway and 107 National Highway, the traffic is very convenient, the geographical position is superior.
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