Release time：2020-01-16 18:44 Browse：
1. **Material Composition and Mechanical Properties** Crafted from high-quality carbon steel, these bolts undergo heat treatment to achieve an 8.8 grade strength classification, ensuring a minimum tensile strength of **800 MPa** and yield strength of **640 MPa**. This makes them suitable for heavy-load applications in machinery, automotive systems, and structural frameworks where reliable load-bearing capacity is critical. The carbon steel base provides a balance of hardness and ductility, reducing the risk of brittleness or deformation under dynamic stress. 2. **Zinc-Nickel Alloy Plating Technology** The extended zinc-nickel alloy coating is applied through an advanced electroplating process, forming a dense, uniform layer that offers **superior corrosion resistance** compared to traditional zinc or cadmium plating. This coating provides a protective barrier against rust, oxidation, and chemical attacks, with salt spray test results often exceeding **1,000 hours** without red rust. The silver-gray finish of the zinc-nickel plating also offers aesthetic appeal while maintaining low contact resistance, making it suitable for both visible and hidden fastener applications. 3. **Design Features for Optimal Performance** - **External Hexagon Head**: Engineered for compatibility with standard hexagonal wrenches, sockets, and power tools, enabling quick and efficient installation or removal. The precise hexagonal geometry minimizes the risk of rounding during tightening, ensuring consistent torque application. - **Integrated Flange Face**: The wide flange base acts as a built-in washer, distributing clamping forces over a larger surface area. This reduces the likelihood of indentation or damage to mating components (especially softer materials like aluminum or plastic) and enhances resistance to loosening caused by vibration or thermal expansion/contraction. - **Thread Precision**: Manufactured to strict ISO metric thread standards (e.g., M6, M8, etc.), ensuring seamless compatibility with nuts and pre-threaded holes across global industrial systems. 4. **Industry Applications and Environmental Adaptability** - **Automotive and Transportation**: Commonly used in chassis components, engine mounts, and suspension systems, where exposure to road salts, moisture, and mechanical stress requires robust corrosion resistance and high strength. - **Industrial Machinery**: Ideal for fastening gears, pumps, and heavy equipment in manufacturing plants, where frequent vibration and exposure to lubricants or coolants demand reliable performance. - **Marine and Offshore Environments**: The zinc-nickel coating’s resistance to saltwater corrosion makes these bolts suitable for marine applications, such as shipbuilding or offshore platform assembly. - **Agricultural Equipment**: Used in tractors, combines, and other farm machinery exposed to dirt, moisture, and organic acids, ensuring long-lasting performance in harsh outdoor conditions. 5. **Compliance and Quality Assurance** These bolts adhere to international standards for fastener design and material performance, including ISO 898-1 (mechanical properties of carbon steel bolts) and ISO 10683 (zinc-nickel plating specifications). Each batch undergoes rigorous testing for: - **Tensile Strength**: Verified via universal testing machines to ensure compliance with 8.8 grade requirements. - **Coating Thickness and Adhesion**: Measured using magnetic induction or cross-cut tests to guarantee uniform coverage and bond strength. - **Corrosion Resistance**: Evaluated through salt spray or humidity chamber tests to confirm longevity in target environments. 6. **Installation Advantages and Cost Efficiency** - **Washerless Design**: The integrated flange eliminates the need for separate washers, reducing component count and assembly time. This simplifies inventory management and lowers overall project costs. - **Wide Temperature Range**: The zinc-nickel coating remains stable in temperatures ranging from -40°C to +120°C, making these bolts suitable for applications with extreme thermal fluctuations. - **Reduced Maintenance**: The combination of high-strength material and durable plating minimizes the need for frequent inspections or replacements, enhancing lifecycle cost efficiency in long-term projects. By integrating robust material science, advanced plating technology, and user-centric design, these carbon steel flange bolts deliver reliable, high-performance fastening solutions for demanding industrial and commercial applications.
