Timber Stainless Steel Holding Down Hex Bolts Sleeve Manufacturer

Hex Bolt Sleeve refers to a general term. Stainless steel bolt includes most stainless steel fastener products such as inner hexagon, outer hexagon, double head, and nut. Because after the production of stainless steel fasteners, unlike bolts made of carbon steel, they need later heat treatment to change their mechanical properties. After the production of stainless steel fasteners, they can be used as long as the surface is cleaned, so their performance characteristics are the performance characteristics of materials.

No rust

Compared with ordinary carbon steel bolts, Stainless Steel Bolts have a better temperature application environment. However, the surface HRC Rockwell hardness of Stainless Steel Bolts is lower than that of carbon steel bolts. Stainless Steel Holding Down Bolts bear the brunt of the main performance of course is not rust, it can be exposed to the air environment for decades without oxidation. Moreover, it can work normally at a very high temperature without changes in strength or torque reference. If the stainless steel bolt after production is passivated again, its high-temperature resistance and corrosion resistance will be more perfect.

Electronegative rate

Stainless Steel Bolts also have a physical property called electronegative rate. Of course, carbon steel bolts also have an electronegative rate, but the electronegative rate of Stainless Steel Bolts of the same specification is more than five times higher than that of carbon steel bolts. The electronegative rate is related to the expansion coefficient of the bolt. Under normal circumstances, the higher the temperature of the external environment, the expansion system of the part will be improved accordingly.

For products with a low electro negative rate, the bolt will not be used when the expansion system increases to a certain value with the increase of temperature, while the stainless steel bolt with an electronegative rate five times that of ordinary carbon steel bolt can keep the expansion coefficient unchanged at high temperature, which is also the reason for its high-temperature resistance.

Mechanical properties

The mechanical properties of Stainless Steel Bolts are relatively moderate. They can't be compared with some high-strength bolts above grade 10.9, but they won't be worse than those below grade 8.8. As long as they are not special occasions, Stainless Steel Bolts can meet the use requirements. Of course, there are also stainless steel materials with high strength, such as duplex stainless steel. However, these materials are used to produce bolt products. Their cost is too high and their use efficiency is greatly reduced. With the development of technology, we believe that the strength of conventional Stainless Steel Bolts will gradually improve.

Why do the mechanical properties of bolts of different materials differ so much? This is mainly because the content of alloy elements of different materials is different, and different material properties will be formed after the composition of various metal elements. For example, the carbon content in materials is a basic metal element in each material. The amount of carbon content has a great impact on the material. [Timber Bolts Manufacturer]Generally, when the carbon content is high, the bolt strength will be high, and when the carbon content is low, the strength will be relatively low. Therefore, the strength of Stainless Steel Bolts is not as high as that of high-strength bolts, mainly because the carbon content is not enough.

The various elements of materials are a kind of basic science, not to add as much as you want, but a comprehensive result. Of course, the reason why Stainless Steel Bolts have the antirust performance that carbon steel bolts do not have is also related to the low content of carbon steel. If you add more carbon content, there will be other changes in performance.

Silicon in the material can strengthen ferrite, improve the hardness of bolts, make the material more plastic and facilitate production. If the material contains manganese, the sulfur in the material can be combined, reducing the impact of sulfur on the performance of bolts. Sulfur is insoluble in iron, which will reduce the strength and toughness of bolts. Therefore, every element will play its due role. With the development of basic material science and technology today, it does not exist that adding or reducing a certain element can change the basic characteristics of materials. It must go through the influence and change of each material and finally get a result.

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