Qingdao Haosail Machinery Co., Ltd.

Qingdao Haosail Machinery Co., Ltd.'s chain product matrix covers all application scenarios, from economical binding to ultra-heavy-duty lifting. It aims to provide safe, reliable, and efficient chain solutions for global industrial customers through precise product grading and superior performance. 

Comprehensive Product Matrix, Precisely Targeting Diverse Working Conditions

Economic General Purpose Series (Grade 30/43): Suitable for agricultural machinery, site fencing, and non-critical binding scenarios. Its excellent toughness and economy meet basic daily needs.

High-Efficiency Transportation Series (Grade 70): Specifically designed for logistics transportation and cargo securing. The galvanized surface treatment provides excellent rust prevention and wear resistance, making it a reliable choice for ensuring safe long-distance transportation.

Professional Lifting Series (Grade 80): The industry-recognized gold standard for lifting operations. Made of alloy steel and rigorously heat-treated, it possesses a perfect balance of high strength and high toughness, widely used in various cranes, hoists, and slings.

High-Performance Ultra-Strength Series (Grade 100/120): Representing the industry's top level. Achieving up to 30% weight reduction while maintaining the same strength, providing a lightweight pinnacle solution for fields with extreme weight and space requirements, such as aerospace, marine operations, and high-end rescue equipment.

Innovative Surface Treatments, Expanding Application Boundaries

Special Zinc Plating: Offering a variety of options including standard zinc plating and thick zinc plating, significantly improving corrosion resistance in marine climates and high-humidity environments.

Dacromet Coating: Eliminating hydrogen embrittlement concerns, providing superior rust prevention and deep coating capabilities compared to electroplating, especially suitable for high-strength bolted connections and complex chain structures.

Specialized Polymer Coatings: Available in various colors (such as blue, purple, etc.), not only facilitating asset management and area differentiation for customers, but also effectively resisting chemical corrosion, reducing friction and wear with sprockets, and lowering operating noise.

Technology-Driven Quality, Manufacturing Adhering to Standards

Materials Science: We select high-quality alloy steel and control the process from the smelting stage to ensure the fundamental properties of the materials.

Heat Treatment Process: Utilizing an advanced closed-loop control heat treatment production line, we precisely control the quenching and tempering processes, ensuring that each chain achieves stable metallographic structure and mechanical properties.

Quality Certification: The end-treatment processes of the entire series of lifting chains (Grade 80 and above) comply with international authoritative standards such as EN 13411 and have passed rigorous destructive testing to ensure connection efficiency and overall safety.

Professional Application Guidance and Promotion of a Safety Culture

"Qingdao HaosaiL provides not only products, but also a safety commitment." Our technical team is always ready to provide customers with professional selection guidance and technical support, jointly promoting the construction of an industrial safety culture.