2020630(火)

China Custom Bolt Wholesaler Produces High-strength Products

The plastic index required by Hexagon Socket Head Bolt外部リンク, the higher the performance level, only the higher grade materials can achieve. The lower grade materials can only meet the strength requirements by reducing the tempering temperature, but they cannot meet the plasticity and toughness requirements. In the test, the brittle fracture was judged as unqualified. The steel structure bolt also stipulates the highest tensile strength, which is to ensure the plastic toughness of the bolt. According to the construction process, it is divided into torsion-shear type high-strength bolts and large hexagon high-strength bolts. The large hexagonal high-strength bolt belongs to the high-strength level of ordinary screws, while the torsional shear type high-strength bolt is an improved type of the large hexagonal high-strength bolt, for better construction. The construction of high-strength bolts must be first tightened and then finalized. The initial tightening of high-strength bolts requires impact-type electric wrenches or torque-adjustable electric wrenches; while the final tightening of high-strength bolts has strict requirements, the final twisting of high-strength bolts must use torsional shear Type electric wrench, torque type high-strength bolts must be used to finalize the torque type electric wrench. Ordinary bolts can be divided into three grades A, B, and C according to manufacturing accuracy. Grades A and B are refined bolts, and grade C is rough bolts. For connecting bolts for steel structures, unless otherwise specified, they are generally ordinary coarse grade C bolts. ①The bolts of class A and B bolts are processed by lathes with smooth surface and accurate size. The material performance level is 8.8. The production and installation are complicated and the price is relatively high. It is rarely used; ②C class bolts are made of unprocessed round steel The size of the material is not accurate enough, and the material performance level is 4.6 or 4.8. The deformation during shear connection is large, but the installation of China Custom Bolt Wholesaler外部リンク is convenient and the production cost is low. It is mostly used for temporary connection during tensile connection or installation.






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