High-strength screw grades and industry solutions for their applications

High Strength Screw Grades and Their Characteristics

High-strength screw grade refers to screws that can withstand more excellent tensile and shear forces and have a wide range of applications in mechanical connectors. Common high-strength screw grade 8.8, 10.9, 12.9, etc., where the number indicates the percentage of tensile strength and shear strength ratio of the screw. For example, a grade 8.8 screw suggests that it has a tensile strength of 8 times and a shear strength of 0.8 times. The following are the main characteristics of each grade:

1. Grade 8.8 screws: with a tensile strength of 800 N/mm², they are suitable for general mechanical connections, general construction, and equipment.

2. 10.9-grade screws: tensile strength of 1000N/mm², suitable for mechanical equipment requiring high strength and durability, such as automobiles, locomotives, airplanes, and so on.

3. 12.9-grade screws: tensile strength of 1200N/mm², suitable for mechanical connections requiring higher load capacity, such as significant construction machinery, motorcycle engines, etc.

Application areas of high-strength screws

1. Machinery and equipment field: in machinery manufacturing, high-strength screws are widely used, such as for fixing the various parts of the lathe, grinder, and other machine tools, to ensure the stability and durability of the machine tools.

2. Automotive field: high-strength screws can withstand high-speed driving in the generation of severe shock and vibration, used to fix the car parts, such as the engine, transmission, brake system, etc.

3. Aviation field: aircraft components. Aircraft components need to use high-temperature, high-strength screws, such as aircraft engine fasteners, oil and gas piping fasteners, etc.

4. Electronics field: electronic equipment in the high-temperature, high-strength screws. Electronic equipment with a large number of screws for assembly and high-strength screws can ensure the stability and reliability of the equipment.

Maintenance of High Strength Screws

High-strength screws require regular maintenance and inspection during use to ensure the performance and reliability of the screws. The following are some standard maintenance methods:

1. Regular inspection: check whether the screws are loose or damaged, and replace the damaged screws in time.

2. Anti-rust treatment: the surface of the screw is susceptible to oxidation and corrosion and needs regular anti-rust treatment.

3. Lubrication treatment: screws bear a huge force vector, and lubricant can make them work more smoothly and reduce wear and corrosion.

In short, the selection and application of high-strength screw grade should be combined with their own needs, but also consider its load-bearing capacity and reliability as well as environmental factors and other factors. In the process of use, we also need to carry out regular maintenance and inspection to ensure its performance and reliability.

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