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Uses: Oil & Gas & Petrochemical Industries, Building Industry, Bridges, Silos, Structures, Steel Frames, ...
One of the most commonly used screws is the hexagon head screw. Hexagon screws are most commonly used in industrial and construction applications. Hexagon screws are used in steel structures, steel structures and niches. They have skipped.
The modern fitting plant now produces steel bolts from size M24 to M48 with hot forging and M24 down with cold forging in grades 8.8 and 10.9 on mass production. The modern fitting lab located in the factory is responsible for the quality control of the screws according to world standards. These include tensile test, hardness, grid determination. Grade screws 10.9 have a higher hardness than Grade 8.8 and HV hex head screws have a hardness of 10.9. But they have a larger head than conventional 10.9 steel bolts. The raw materials used in Grade 8.8 are the CK45 and the MO40 material for the 10.9 hexagon screw is used MO40 is the material used to make the bolt master. But for Grade 12.9, VCN is used, which unfortunately is hard to find in our country.
Most steel bolts have a black phosphate coating, which is explained in full in the metal coating article
On the other hand, the head screws with Grade 5.6 are also used for lighter structures as well as for connecting metal and non-metallic parts that do not withstand high pressure.
Stainless steel hexagon bolts, which have both high hardness and high corrosion resistance, can be used for high pressure and high humidity environments.
For steel and iron screws, different types of coatings are used, such as cold galvanized plating, hot galvanizing, dichromate, etc. Grade 10.9 screws should not be used for hot galvanizing, as they will cause hydrogen cracks at the screw surface. is
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