High-strength fasteners for steel structures include:
High-strength large hexagon head bolt fastener for steel structure
Torsion-shear type high-strength bolt fastener for steel structure
Hexagon flange face for steel structure and large hexagon torsion-shear type high-strength bolt fastener
Specification: M16～M36 3/8″～2″
Standard: National standard, American standard
It's mainly used in
railway and highway bridges, boiler steel structures, industrial plants,
high-rise civil buildings, tower mast structures, lifting machinery and other
steel structure occasions.
This product is characterized by high strength and good toughness, and at the same time, it has strict torque coefficient requirements. The average torque coefficient of the same batch of fastener is 0.110~0.150; the standard deviation of the torque coefficient is ≤0.010. During construction, the torque coefficient control method and the tightening axial force control method are adopted for construction. It has a wide range of use, uniform stress during construction, large bearing capacity, high fatigue strength under alternating load, and has features of easy installation, easy disassembly and easy maintenance. Stable torque coefficient, tightening axial force and small standard deviation are the key technologies of the fastener. The development and application of key process technologies, such as automated heat treatment process and phosphorus saponification surface treatment process, make the fastener manufacturing process advanced and reasonable. The production equipment of this product has a high degree of automation, complete testing methods, and stable and reliable product performance indicators. The successful product development has filled the domestic gap, the manufacturing process has reached the domestic leading level, and the economic and social benefits are remarkable.
 
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