Is A Grade 8 Bolt Stronger Than Stainless Steel? The Article Will Tell The Truth

April 25 14:58 2023

Grade 8 bolts and stainless steel bolts are both common fasteners and are frequently used in many mechanical and construction applications. For applications that require high strength and corrosion resistance, it is critical to choose the right bolt. So, which is stronger, the grade 8 bolt or the stainless steel bolt?

Grade 8 bolts, also called high-strength bolts, are bolts made of material 45, 40Cr, 35CrMoA, etc. and manufactured through multiple processes such as heat treatment and surface coating. They have high strength, good tensile and shear resistance, wear resistance, corrosion resistance, etc. They are usually used in heavy-duty and metallurgical machinery.

Stainless steel bolts, as the name implies, are fasteners made of stainless steel. They have good chemical properties such as rust and corrosion resistance, and are commonly used in marine facilities, food processing and other applications. 

Although both types of bolts have their own characteristics, Grade 8 bolts are more reliable as far as sturdiness is concerned. This is because grade 8 bolts have more stringent standards and requirements in terms of material selection, production, and surface treatment. Specifically, the following three aspects are the main reasons why grade 8 bolts are superior to stainless steel bolts.

First, the material of grade 8 bolts is stronger. grade 8 bolts are usually made of high-strength alloy steel such as 40Cr, 35CrMoA, etc. The material itself has a very high strength and tensile shear resistance. During the production process, heat treatment and surface galvanization are also required to further improve their corrosion resistance and mechanical properties. In the case of stainless steel bolts, although the material is also excellent, its strength and mechanical properties are relatively low and cannot reach the level of grade 8 bolts.

Secondly, the connection of grade 8 bolts is stronger. Because the material of grade 8 bolts is hard and solid, it is not easy to deform or break when connecting, and the connection is more solid. The stainless steel bolts are relatively soft and easy to break or deform when connected, so they are less suitable for connecting heavy load or components with high mechanical performance requirements.

Finally, grade 8 bolts have better loosening prevention performance. In the process of use, the bolt is easy to cause the bolt itself to loosen due to mechanical vibration or vibration environment. The nut surface of grade 8 bolts adopts anti-slip design, which can effectively avoid loosening of the bolt and make the connection more solid. The anti-loosening performance of stainless steel bolts is relatively poor.

In summary, grade 8 bolts are stronger than stainless steel bolts. Of course, in practical application, the suitable bolt should be chosen according to the specific situation. If you need to have better rust and corrosion resistance, you can choose stainless steel bolts; if you need to have higher strength and connection performance, it is recommended to choose grade 8 bolts. grade 8 bolts and stainless steel bolts are one of the main products of Aozhan Hardware Fasteners, and the products are recognized by many companies with high reorder rate, if you are interested, welcome to contact us at info@, we will send you a complete bolt catalogue and a free discounted quotation.

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Company Name: Nanning Aozhan Hardware Fastener Co., Ltd.
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Country: China

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