Suzhou Tuoertai Precision Technology Co., Ltd
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High Strength hex head bolt 10.9 applied on the automotive industry
Bolts made of high strength steel, or requiring greater pre-tightening force, can be called high strength bolts.
High-strength bolts are mostly used for the connection of bridge, rail, high pressure and ultra-high voltage equipment.
The fracture of this kind of bolt is mostly brittle fracture.
Applied to high strength bolts on ultra-high voltage equipment, in order to ensure the sealing of the container, it is necessary to apply a large prestress.
Before plating process
Hot rolled coil strip- (cold dial) -spherical (softening) annealing-mechanical phosphorus removal-pickling-cold dial-cold forging forming-thread processing-heat treatment-inspection
