8.8 Grade Hexagon Flange Bolts Extended Axle M12: Various surface treatments and material options
Publish Time: 2024-09-09
In the field of mechanical connection, bolts play a key role as an important connector. Among them, 8.8 Grade Hexagon Flange Bolts Extended Axle M12, with its unique design and diverse surface treatment and material selection, meets the use requirements under different working conditions.
Bolt Grade and Specifications
8.8 Grade Strength
8.8 Grade Hexagon Flange Bolts Extended Axle M12 has high strength. The "8" represents a tensile strength of about 800MPa, and the "0.8" represents a yield strength ratio of about 0.8, which enables the bolts to provide a reliable connection when subjected to tension and shear forces.
This strength grade is suitable for many medium to heavy load mechanical connection scenarios to ensure the stability and safety of the structure.
Hexagonal Flange Design and Extended Axle M12 Specifications
The design of the hexagonal flange provides a larger contact area, which can evenly distribute the pressure when tightening the bolts to prevent excessive local pressure on the connector.
M12 means that the nominal diameter of the bolt is 12mm, and the design of the extended shaft can adapt to some special connection structures, increasing the versatility and scope of use of the bolt.
Surface treatment method
Electrophoresis treatment
Electrophoresis is a commonly used surface treatment method. Through the electrophoresis process, a uniform and dense protective film is formed on the surface of the bolt.
The bolts treated with electrophoretic black zinc are not only beautiful in appearance, but also have good corrosion resistance, which can prevent the bolts from rusting to a certain extent and extend their service life.
Trivalent color treatment
Trivalent color treatment can give the bolts a unique color appearance, and at the same time enhance the protective performance of the bolt surface.
This treatment method can provide good chemical corrosion resistance and weather resistance while meeting certain decorative requirements.
Dacromet treatment
Dacromet treatment is a new type of surface anti-corrosion treatment technology. After the Dacromet-treated bolt, a composite coating composed of metals such as zinc and aluminum is formed on its surface.
This coating has excellent corrosion resistance, especially in harsh environmental conditions such as high humidity and high salt spray, which can effectively protect the bolts from corrosion.
Zinc-nickel alloy treatment
Zinc-nickel alloy treatment forms a zinc-nickel alloy coating on the surface of the bolt. This coating combines the advantages of zinc and nickel and has the characteristics of high corrosion resistance and low hydrogen embrittlement.
Bolts with zinc-nickel alloy coating have been widely used in the fields of automobiles, aerospace, etc., because these fields have extremely high requirements for the corrosion resistance and reliability of the connecting parts.
Material selection
35K material
35K is a high-quality carbon structural steel. It has good strength and toughness, and after proper heat treatment, it can meet the strength requirements of 8.8 Grade Hexagon Flange Bolts Extended Axle M12.
Bolts with 35K material have good processing performance and relatively low cost, and are widely used in many general industrial fields.
10B21 material
10B21 is a boron steel with high strength and good cold heading performance.
This material is suitable for the manufacture of bolts that require cold heading, such as hexagonal flange bolts, and the dimensional accuracy and mechanical properties of the bolts can be guaranteed during the processing process.
40CR material
40CR is an alloy structural steel containing chromium, which gives it good hardenability and comprehensive mechanical properties.
After quenching and tempering, the strength and hardness of 40CR bolts are significantly improved, which is suitable for some occasions with high requirements for bolt strength and wear resistance.
8.8 Grade Hexagon Flange Bolts Extended Axle M12 can meet the needs of bolt connections in different industries and working conditions with its diverse surface treatments (such as electrophoresis, trivalent color, Dacromet, zinc-nickel alloy, etc.) and a variety of material options (35K, 10B21, 40CR, etc.). Whether in general machinery manufacturing, automotive industry or aerospace, you can choose the appropriate surface treatment and material according to the specific use environment and performance requirements to ensure the reliability and stability of the bolt connection.
