Industrial screws are produced in various shapes and standards.Steel alloys have a very high ability to suspend very high stresses under the influence of heat treatment, leading to the choice of this alloy when producing steel bolts used in industrial structures.Ferroalloy steels have a moderately high carbon content and much higher properties than pure iron, which is very soft.Of course, in addition to carbon, stabilizing compounds like manganese, silicon, sulfur, phosphorus, and sometimes even vanadium (vanadium is added to steel compounds that require elasticity) are found in steel compounds.
In the construction industry, structural bolts and nuts are used to a considerable extent in the production of sheds, bridges, dams and power plants.In fact, the use of structural bolts and nuts is done alternately by welding metals, which means either structural bolts or arc welding using electrodes, depending on the need to join the steel plate and beam.Each connection method has its own advantages and disadvantages, which we will examine below.
Structural screws used in building beam connections are made of high-grade steel, typically grade 10.9 steel.Grade 10.9 means that the tensile strength density of the structural screw is about 1040 N/mm2, and it can withstand up to 90% of the total stress applied to the screw body in the elastic region without permanent deformation.Compared with 4.8 iron, 5.6 iron, 8.8 dry steel, structural screws have higher tensile strength and have more complicated heat treatment in production.
Different from the standard standard hexagon bolts and nuts, the standard hexagon bolts and nuts are produced according to DIN931 standard as half gears, according to DIN933 standard as full gears, and hexagonal screws are simple, usually produced according to DIN6914 standard.Coupling nuts on structural screws also have more flesh and height than standard hex nuts produced to DIN934, exhibiting higher stress resistance, produced to DIN6915.The screws of this construction are marked 10HV and are usually matt black phosphating for improved environmental rust resistance or hot dip galvanized or deep chrome matt silver, both with a metallic finish.They are used in zinc and have good environmental resistance.
Post time: Apr-14-2022
