The high strength bolt refers to the strength above how much
Datetime:2016.11.02 From:HanDan HaoQiang Fastener Manufacturing Co.,Ltd
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High strength bolts are bolts of grade 8.8 and above, of course, 9.8, of course, high strength bolts, and 10.9, and 12.9 are high strength bolts. There are 10, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 with bolt performance grades, of which 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), all known as high strength bolts, and the other commonly known as common bolt. 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. For example, 10.9, 10 indicates that the tensile strength of the bolt is 1000MPa, and 0.9 indicates that the bending strength ratio of the bolt is 0.9, that is to say, the ratio of the yield strength to the tensile strength of the bolt is 0.9, that is, the yield strength of the bolt is 1000*0.9=900MPa, that is, the transverse stress of the cross section of the bolt must be less than 900MPa when the bolt is actually used.
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