DIN766 ISO4565 Marine Hot Dipped Galvanized Calibrated Anchor Chain Dia.8mm

Product Description:

Material Advantages:

DIN766 ISO4565 Marine Grade Hot Dipped Galvanized calibrated anchor chain dia.8mm Yacht Boat Hardware

Manufacturing Process:

The production process of DIN766 and ISO4565 marine hot-dip galvanized calibration anchor chains generally includes the following steps:

1. **Material Inspection:** Inspect the raw steel to ensure it meets relevant standards and requirements, such as checking the chemical composition and mechanical properties. The bar stock should be free of defects such as raised ribs, deep scratches, cracks, and delamination.

2. **Cutting:** Cut the steel into bars of appropriate length according to the circumference of the chain links and the diameter of the chain body. Bars of different specifications, grades, and furnace numbers should be stacked separately.

3. **Heating:** Heat the bar stock to a specific temperature. The heating temperature varies depending on the unit. For example, units #5 and #6 control the temperature between 730°C and 880°C, with a flame color of dark cherry red to bright cherry red. After heating, the ends of the bar stock should be free of obvious "incandescence" or end face collapse, which would affect quality.

4. **Bending (Binding) Links:** Use a chain link forming machine to bend the heated bar stock into chain link shapes and connect them to the previous chain link. The bending temperature varies depending on the unit. For example, for units #7 and #9, it is controlled at around 800°C, with a flame color of cherry red. After bending, the chain link opening should be centered and flush, and there should be no obvious roller marks, push rod marks, or other surface defects.

5. **Welding**: Use flash butt welding to firmly weld the chain link joints. Welding parameters must be carefully controlled. For example, the back temperature of rings #5, #6, and #7 should be controlled at around 600°C-700°C, with a flame color of brownish-red to dark cherry red. Before welding, the visual inspection distance between the joints should be ≤2mm. The welding process should include four stages: intermittent flash, continuous flash, rapid upsetting, and cooling.

6. **Deburring**: When the chain link weld temperature reaches around 550°C, with a flame color of dark brownish-red to dark red, remove excess metal from the weld joint to make the weld surface smooth.

7. **Stop Pressing (Shaping):** The chain links are pressed to ensure precise shape and dimensions, meeting standard requirements. For anchor chains with stops, welding is also required.

8. **Heat Treatment:** Depending on the anchor chain's grade, appropriate heat treatments are performed, such as quenching, tempering, and normalizing, to improve the anchor chain's strength, toughness, and other mechanical properties.

9. **Load Testing:** Samples of the produced anchor chain are taken for load testing to assess its strength and toughness, ensuring it can withstand the specified working load. Anchor chains typically undergo proof-testing, meaning the test load is twice the working load limit.

10. **Surface Treatment:** Hot-dip galvanizing is generally used. The anchor chain undergoes pretreatment such as cleaning and pickling, then is immersed in molten zinc to form a uniform, dense zinc layer on the surface, improving the anchor chain's corrosion resistance.

11. **Final Inspection:** A final quality inspection of the anchor chain is conducted, including visual inspection, dimensional measurement, and non-destructive testing, to ensure that the anchor chain conforms to relevant standards such as DIN766 and ISO4565, and customer requirements.

12. **Packaging and Coating:** After passing inspection, the anchor chain is packaged and coated with paint to further protect the surface, then stored in the warehouse awaiting shipment.

Features:

DIN766 and ISO4565 marine hot-dip galvanized calibrated anchor chains have the following characteristics:

- **High Strength and Reliability**: Typically manufactured using high-tensile carbon steel or other high-quality steel, such as Grade 43, they possess high tensile strength, capable of withstanding the immense tensile forces exerted by the ship while anchored, ensuring stable anchoring in various sea conditions.

- **Precise Calibration Dimensions**: Precisely calibrated according to DIN766 and ISO4565 standards, the chain links have high dimensional accuracy. For example, the 10mm length of the 10 links in a DIN766 standard has specific requirements. The calibrated dimensions perfectly match the sprockets of most marine anchor winches, ensuring smooth operation of the anchor chain and reducing wear and jamming.

- **Excellent Corrosion Resistance**: The hot-dip galvanizing process forms a uniform and dense zinc layer on the anchor chain surface, effectively isolating it from seawater, moisture, and other corrosive media, preventing rust and corrosion, and extending its service life in harsh marine environments. Some products also utilize enhanced solid zinc hot-dip galvanizing, such as MF brand anchor chains. Their galvanized layer has a deeper micron-level depth and stronger adhesion, extending the effective working life of the galvanized layer by 25%.

- **Good Flexibility**: The short links and compact design give the anchor chain good flexibility, allowing for smoother winding on anchor winch drums and sprockets, reducing the likelihood of excessive bending or stiffness. This contributes to improved ease of operation and extended service life.

- **Strict Quality Control**: The production process involves rigorous quality inspections, including material inspection, load testing, and non-destructive testing. Each link undergoes a proof-load test to ensure each weld is strong and reliable, meeting relevant standards and specifications, and guaranteeing the safety and reliability of the anchor chain during use.

- **High Adaptability**: Anchor chains are available in various specifications, with diameters ranging from 6mm to 90mm, meeting the needs of vessels of different tonnages, from small yachts to large merchant ships. Furthermore, their design adapts to various marine environments and mooring conditions.

Technical Parameters:

Applications:

DIN766 and ISO4565 marine hot-dip galvanized calibrated anchor chains are primarily used in the following areas:

- **Ship Anchoring**: This is the most common application, including various types of vessels such as cargo ships, passenger ships, yachts, and fishing boats. For example, 8mm anchor chains are suitable for large recreational boats of 30-40 feet or vessels with large displacements, and can be used for deep-sea anchoring, dealing with strong currents, or nighttime mooring. Their high-precision manufacturing and accurate calibration ensure a perfect fit with the sprockets of marine anchor winches, guaranteeing smooth deployment and retrieval of the anchor chain.

- **Marine Engineering**: In marine engineering structures such as offshore platforms and offshore wind power facilities, anchor chains are used to secure platforms or facilities, maintaining their stability in the marine environment. Galvanizing effectively improves the corrosion resistance of the anchor chain, adapting to the harsh seawater environment in marine engineering, and ensuring long-term safety and reliability.

- **Mooring System**: In addition to ship anchoring, mooring systems can also be used in ports, docks, etc. to moor ships to the dock or other fixed facilities, providing reliable mooring force and preventing ships from moving or drifting due to wind, waves, or other factors.

Support and Services:

After-sales consultation: We provide 24/7 customer service to answer customer questions regarding anchor chain usage, such as anchor chain specification selection, usage methods, and maintenance points.

Regular follow-up visits: The manufacturer may conduct regular follow-up visits to customers to understand the anchor chain usage and collect customer feedback in order to continuously improve product quality and service levels.

Maintenance guidance: The manufacturer or professional organizations will provide customers with anchor chain maintenance guidance, including regularly checking for deformation, rust, and wear of the chain links; cleaning the anchor chain with special cleaning agents and brushes; applying rust-preventive oil or corrosion inhibitors after cleaning; and lubricating the chain link connections.

This high - strength alloy steel painted stud - link anchor chain, with its excellent quality and attentive service, builds a solid guarantee for your maritime career. Choosing us means choosing safety, efficiency, and worry - free operation. Embark on a new journey of navigation, starting from choosing our anchor chain!
 
Any question please let us know ,our JinCheng maritime will provide you the best service with 7*24 hours ~