What Is The Tensile Strength Of An 8.8 Bolt?

In this article, we will focus specifically on the 8.8 bolt tensile strength. We will explore what 8.8 denotes in terms of bolt strength, its material composition, and the applications where these bolts are commonly used.

Understanding The 8.8 Bolt Grade

The grade of a bolt is an indicator of its mechanical properties, including tensile strength. In the case of an 8.8 bolt, the number before the decimal point refers to its ultimate tensile strength (UTS) in hundreds of megapascals (MPa). Therefore, an 8.8 bolt has an UTS of 800 MPa.

Material Composition Of 8.8 Bolts

The 8.8 grade bolts are typically made from medium carbon steel alloy. The two-digit number after the decimal point in the grade designation represents the carbon content of the bolt material. For instance, in an 8.8 bolt, the second digit “8” signifies a carbon content of approximately 0.38-0.48%.

Properties And Characteristics Of 8.8 Bolts

Apart from their high tensile strength, 8.8 bolts possess several other important characteristics. These bolts exhibit good hardness, ductility, and resistance to wear and fatigue. Due to their medium carbon content, they also provide reasonable levels of machinability and weldability, making them versatile for various applications.

Common Applications Of 8.8 Bolts

8.8 bolts find widespread use in many industries due to their favorable strength-to-cost ratio and desirable properties. Some common applications include:

  1. a) Construction and infrastructure projects, such as bridges and buildings.
  2. b) Automotive industry, especially in critical components like engine mounts and suspension systems.
  3. c) Manufacturing and machinery, including equipment assembly and fastening heavy machinery parts.
  4. d) Oil and gas sector, where they are utilized in pipeline construction and offshore installations.
  5. e) Aerospace industry, mainly for non-critical components and structural elements.

Factors Influencing Tensile Strength

Several factors can affect the tensile strength of an 8.8 bolt, including:

  1. a) Heat treatment: Proper heat treatment processes, such as quenching and tempering, can enhance the strength and mechanical properties of the bolt.
  2. b) Bolt size and threading: The diameter and threading of the bolt can influence its load-bearing capacity and tensile strength.
  3. c) Environmental conditions: Extreme temperatures, exposure to chemicals, and corrosive environments can potentially impact the tensile strength of the bolt over time.
  4. d) Bolt installation and tightening: The correct torque and proper installation techniques are crucial to maintaining the bolt’s intended strength and performance.

Stainless Steel Tube Stockists

Stainless steel tube stockists are companies or suppliers that specialize in the storage and distribution of stainless steel tubes. These stockists play a vital role in providing a wide range of stainless steel tubing options to various industries and customers. They maintain inventories of different grades, sizes, and specifications of stainless steel tubes, ensuring availability for immediate purchase or delivery.

Stainless steel tube stockists cater to the needs of industries such as construction, manufacturing, automotive, oil and gas, and many more. They offer an extensive selection of stainless steel tubes, including seamless and welded options, in various shapes like round, square, and rectangular. These tubes are manufactured using high-quality stainless steel alloys, ensuring durability, corrosion resistance, and aesthetic appeal.

By partnering with stainless steel tube stockists, customers can benefit from their expertise, industry knowledge, and efficient supply chain management. Stockists also provide value-added services such as cutting, customizing lengths, and surface finishing to meet specific project requirements. Overall, stainless steel tube stockists serve as reliable sources for acquiring stainless steel tubes promptly and efficiently.


The tensile strength of an 8.8 bolt is 800 MPa, indicating its high load-bearing capacity. These bolts, made from medium carbon steel alloy, offer good hardness, ductility, and resistance to wear and fatigue. They are widely used in various industries for their strength and versatility. Considering factors like heat treatment, bolt size, and installation procedures will help ensure the bolts perform optimally in their intended applications.

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