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High-strength bolts are a type of high-strength fastening component widely used in the connections of important structures such as bridges, railways, high-pressure vessels, and industrial buildings. The following is a detailed introduction to high-strength bolts:
Materials and Performance
Materials: Typically made from high-quality carbon steel or alloy steel, such as 45# steel, 40Cr steel, etc. These materials undergo special heat treatment processes, such as quenching and tempering, to enhance the strength and toughness of the bolts.
Performance Characteristics: High-strength bolts have high tensile strength and yield strength, capable of withstanding large tensile and shear forces. Their tensile strength is generally above 800MPa, and yield strength is above 640MPa. At the same time, high-strength bolts also exhibit good fatigue resistance and corrosion resistance.
Types
Friction-type high-strength bolts: Rely on the friction between the connected components to transmit force, suitable for structures that bear dynamic loads, such as bridges and crane beams.
Pressure-bearing high-strength bolts: In addition to relying on friction to transmit force, they also allow for a certain degree of relative slip between the connected components to fully utilize the pressure-bearing capacity of the bolts. Suitable for structures that bear static loads or indirectly bear dynamic loads.
Connection Forms
Single shear connection: The bolt only bears shear force in one direction, suitable for connecting thinner components.
Double shear connection: The bolt bears shear force in two directions, suitable for connecting thicker components.
Multi-row connection: When the connected components are wide or need to transmit larger forces, multi-row high-strength bolt connections can be used.
Application Fields
Building Structures: In steel structure buildings, high-strength bolts are widely used in beam-column connections, support connections, and other areas, effectively improving the integrity and seismic performance of the structure.
Bridge Engineering: An indispensable connecting component in bridge structures, used to connect the main beams, piers, and abutments of bridges, ensuring the safety and reliability of the bridge.
Mechanical Manufacturing: In the field of mechanical manufacturing, high-strength bolts are commonly used to connect various mechanical equipment components, such as engines, transmissions, and machine tools, ensuring the normal operation of the equipment.
Power Engineering: In the construction of power facilities such as power towers and substations, high-strength bolts are widely used to connect steel structural components, ensuring the stable operation of power facilities.
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High-strength bolt
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E-mail：yanzheng@hbsj-fasteners.com
Add: South of Liu Han Village, Liu Han Township, Yongnian District, Handan City, Hebei Province
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