Large hexagonal head bolt connection pair for steel structure
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Executive standard：GB/1231-2006、EN14399-3,4:2005、ISO7412、DIN6914-6916、ASTMA325,A490
Available materials：20MnTiB、35VB、40Cr、35CrMoA、TYP1、TYP3
Large hexagonal head bolts are a kind of fasteners widely used in steel structure connections. Their main function is to fix two or more steel structures through threaded connection to achieve the stability and safety of the overall structure. As an indispensable by-product of steel structure connection, large hexagonal head bolts have important applications in construction, bridges, automobiles, mechanical equipment and other fields.
Material:
Large hexagonal head bolts are usually made of carbon steel, alloy steel or stainless steel to ensure that they have sufficient strength and corrosion resistance. Carbon steel large hexagonal head bolts are suitable for general engineering structures, while alloy steel bolts are suitable for occasions with greater tension and torque, and stainless steel bolts are suitable for use in humid or corrosive environments.
Process:
The manufacturing process of large hexagonal head bolts usually includes material selection, forging, quenching, thread processing, surface treatment and other links. Among them, the forging process is the key link to ensure the strength and durability of the bolts. Through hot forging, the bolts can obtain uniform organizational structure and excellent mechanical properties during the manufacturing process.
Parameters:
The parameters of large hexagonal head bolts mainly include diameter, length, thread specification, thread length, bolt grade, etc. Commonly used large hexagonal head bolts are M12, M16, M20, etc. The thread length is generally 1.25 times the bolt diameter. The bolt grades are generally divided into 4.8, 8.8, 10.9, etc. The bearing capacity and tensile properties of bolts of different grades are also different.
Application scenarios:
Large hexagonal head bolts are widely used in steel structure buildings, bridges, tower cranes, mechanical equipment and other fields. In steel structure buildings, large hexagonal head bolts are often used to connect various components, such as beam-column connections, beam-beam connections, column base connections, etc.; in bridge engineering, large hexagonal head bolts are often used to connect bridge beams, beam-column connections, etc.; in the field of mechanical equipment, large hexagonal head bolts are usually used to fix various parts of mechanical equipment.
In general, large hexagonal head bolts, as key fasteners in steel structure connections, have important functions and application value. By reasonably selecting materials, processes and specification parameters, it can be ensured that large hexagonal head bolts can play a better connection effect in engineering practice and improve the stability and safety of the structure.
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