U1 U2 U3 Grade 22mm 26mm 38mm 52mm Marine_Anchor_Chains_Price_U2_U3_Grade_Stud_Link_Anchor_Chain_For_Ship

Product Description:

Material Advantages:

U2 Grade: Made of high-quality carbon structural steel with precise heat treatment. It features excellent toughness and fatigue resistance, suitable for medium-sized vessels, inland ships, and nearshore operation scenarios with moderate load requirements.
U3 Grade: Crafted from high-strength alloy steel, undergoing quenching and tempering processes to achieve superior tensile strength and impact resistance. It meets the anchoring needs of large ocean-going ships, offshore oil platforms, and deep-sea operation vessels, capable of withstanding extreme loads and harsh marine conditions.
2. Structural Design: Stud Link
The anchor chain adopts a stud link structure—each link is equipped with a central stud (reinforcing rod) that effectively prevents the adjacent links from twisting, deforming, or getting stuck during tension. This design not only enhances the overall rigidity and load-bearing capacity of the chain but also ensures smooth operation during anchoring and retrieval, reducing friction and wear between links, thereby extending the service life.

Manufacturing Process:

1. Raw Material Preparation and Pretreatment
Select suitable low-carbon steel wire rod (e.g., Q235) with a diameter slightly larger than 8mm to allow for subsequent processing.

Surface treat the steel wire rod to remove oxide scale, oil, and other impurities to avoid affecting subsequent forming and welding quality.

Draw the steel wire rod to a standard diameter of 8mm using a wire drawing machine to ensure the dimensional accuracy of the chain material.

2. Chain Forming and Welding

Chain Braiding: Using specialized chain braiding equipment, bend the 8mm steel wire into "日" (sun) shaped chain links, controlling the inner width and length of the links according to DIN766 standards.

Welding: Use flash butt welding or resistance welding to weld the joints of each chain link to form a closed chain link. After welding, remove weld slag to ensure a smooth joint.

Shaping: Use shaping equipment to correct the shape and size of the chain links, ensuring smooth connection between adjacent links without deformation or jamming.

3. Heat Treatment and Strength Testing

Heat Treatment: The welded chain undergoes overall tempering treatment (e.g., annealing, quenching + tempering) to eliminate welding stress and improve the chain's tensile strength and toughness, meeting the load requirements of marine applications.

Tensile Testing: Randomly selected finished chains are subjected to tensile tests to verify whether their tensile strength and breaking load meet DIN766 standards. Unqualified products are rejected.

Appearance and Dimensional Inspection: The surface flatness and link dimensional deviations of each chain are inspected to ensure there are no defects such as cracks or dents.

4. Hot-Dip Galvanizing for Corrosion Protection

Pre-treatment: The chain surface is cleaned again to remove oil and rust, followed by pickling to remove rust. Finally, it is immersed in a flux to improve the adhesion of the zinc layer.

Hot-Dip Galvanizing: The chain is immersed in molten zinc at 440-460℃ to form a uniform and dense zinc alloy coating on the chain surface. The thickness must meet corrosion protection requirements (typically ≥85μm). Post-treatment: Remove the galvanized chain, cool it, and remove excess zinc nodules from the surface. If necessary, perform passivation treatment to further enhance corrosion resistance.

5. Finished Product Inspection and Packaging: Conduct a final inspection of the galvanized chain, including zinc layer adhesion (e.g., cross-cut test), appearance (no uncoated areas, peeling), and dimensional verification.

Inspected and qualified chains are wound and packaged to the specified length (e.g., 10 meters/coil), labeled with specifications, standards, production date, and other information, and prepared for shipment.

Features:

Superior Strength & Durability: U2/U3 grades meet international marine strength standards, with high tensile strength and yield strength. They can withstand strong currents, wind loads, and impact forces during anchoring, without easy deformation or fracture.
Excellent Corrosion Resistance: The hot-dip galvanizing process forms a dense protective layer on the surface, effectively isolating seawater, salt, and other corrosive media. The service life in marine environments is 30% longer than that of ordinary anchor chains.
Stable Structural Performance: The stud link design avoids link dislocation and jamming, ensuring smooth winding and unwinding on the anchor winch. It maintains structural stability even under long-term cyclic loads.

Technical Support: Suppliers typically provide technical consultation services to answer customer questions regarding chain selection, installation, use, and maintenance.

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 ~