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How are bolts measured with the relevant standards

Jan 20, 2016

 Bolt in daily life and industrial production and manufacturing, is little not, bolt, also known as industrial meters. The use of visible bolts widely. The application range of bolt are: electronic products, mechanical products, digital products, power equipment, mechanical and electrical machinery products. Vessels, vehicles, water conservancy projects, and even chemical experiment is also useful to bolt. In the experiment, sometimes encountered such a problem: how are the bolts measured. Of course in the digital products are precision bolt used above. DVD, camera, glasses, watches and clocks, electron, etc., using micro bolt; TV, electrical products, instruments, furniture and other general bolt; As to bridge engineering, construction, using a large bolt, nut; Transportation equipment, aircraft, trains, cars, etc for the bolt and size. So, through some relevant standard level of performance, can make the judgement of how are the bolts measured. 

OKorder How are bolts measured with the relevant standards

   In accordance with the relevant standards, bolt performance are rated 3.6, 4.6, 3.6, 4.6, 6.8, 8.8, 9.8, 10.9, 12.9, and so on more than 10 levels, including a magnitude of 8.8 and above the bolt is made of low carbon alloy steel and medium carbon steel and the heat treatment (quenching and tempering), known as high strength bolts, the rest of the known as ordinary bolts. Bolt performance rating label consists of two parts Numbers respectively represent the nominal tensile strength value of bolt material and QuJiang ratio. Bolt performance level is the meaning of international standards, the same level of performance of bolt, regardless of its material and the origin of the difference, its performance is the same, the design can only choose performance level. Strength grade 8.8 and 10.9 magnitude refers to the level of the shearing stress of bolt is 8.8 GPa and 10.9 GPa, 8.8 nominal tensile strength of 800 n / 640 n was nominal yield strength bolts/was generally is expressed in "X.Y" strength, X * 100 = the bolt tensile strength, X * 100 * (Y / 10) = yield strength of the bolt (as stipulated in the logo: yield strength tensile strength = Y / 10). Actually doing the mechanical design, the calculation of bolt, on how are the bolts measured, sometimes will spend big chapter for precise monitoring, to ensure that design rigor. 

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