High Strength Welded G80 Lifting Load Chain

1. Core Material & Welding Craftsmanship

• High-Quality Alloy Steel: Constructed from heat-treated alloy structural steel (e.g., 20Mn2 or 23MnCrNiMo54), the chain undergoes precise quenching and tempering processes. This treatment enhances its tensile strength, yield strength, and resistance to wear and impact, enabling it to withstand harsh working conditions (e.g., heavy loads, temperature fluctuations).
• Precision Flash Butt Welding: Each chain link features a seamless, high-integrity flash butt weld—far superior to traditional manual welding. The welding process is computer-controlled to ensure uniform fusion of link ends, eliminating weak points (e.g., cracks, porosity) and guaranteeing consistent load-bearing capacity across every link.

2. G80 Grade Performance & Safety

• Strength Metrics: Typical working load limits (WLL) range from 0.5t to 100t (depending on chain diameter, e.g., 6mm chain = 0.8t WLL; 26mm chain = 25t WLL). The minimum breaking load (MBL) is 4 times the WLL (4:1 safety factor), exceeding lower grades (e.g., G60 = 3:1 safety factor) to handle unexpected shock loads.
• Fatigue Resistance: The heat-treated surface and smooth link contours reduce stress concentration, enabling the chain to withstand repeated lifting cycles (up to 10,000+ cycles) without fatigue cracking—ideal for continuous-use applications (e.g., factory assembly lines, port container handling).

3. Durability & Environmental Adaptability

• Corrosion Protection: Available with multiple surface treatments to suit harsh environments:
  • Black Oxide Coating: For general industrial use, providing basic rust resistance and low friction.
  • Hot-Dip Galvanization: For outdoor or humid environments (e.g., construction sites, marine applications), offering long-term protection against saltwater and moisture.
  • Nickel-Plating: For cleanroom or food-processing industries, ensuring corrosion resistance and compliance with hygiene standards.
• Abrasion Resistance: The hardened steel surface (Rockwell hardness HRC 30-35) resists wear from contact with hooks, shackles, or rough loads, extending the chain’s service life by 30% compared to non-hardened alternatives.

4. Application Scope

• Heavy industry (steel mills, automotive manufacturing, machinery moving).
• Logistics & ports (container lifting, warehouse pallet handling).
• Construction (crane lifting of concrete structures, steel beams).
• Mining & energy (hoisting equipment parts, mineral containers).

5. Quality Assurance & Compliance

• Individual Load Testing: Each chain is pressure-tested to 1.5 times its WLL to verify structural integrity.
• Visual & Dimensional Inspection: Links are checked for uniform size, weld quality, and surface defects (e.g., burrs, deformation) using precision gauges.
• Certifications: Complies with ISO 3077, EN 818-2 (European standard), and ANSI ASME B30.9 (U.S. standard), with each chain accompanied by a test certificate for traceability (batch number, WLL, MBL, inspection date).

6. Usage & Maintenance Recommendations

• Never exceed the rated WLL or use damaged chains (e.g., bent links, cracked welds).
• Inspect the chain before each use for signs of wear, corrosion, or deformation.
• Lubricate regularly with high-pressure lithium grease to reduce friction and prevent rust.
• Store in a dry, ventilated area to avoid moisture damage.

Since its establishment in 2005, Qingdao Jincheng Maritime Technology Co., Ltd. has been steadily advancing in the maritime technology field for nearly two decades. The company focuses on the core business of manufacturing marine supplies, always adhering to the concepts of innovation and excellence, and is committed to providing comprehensive and high-quality products and services to the global maritime industry.

In terms of product manufacturing, the company has a rich and diverse product line, covering marine navigation equipment, marine safety protection supplies, marine interior decorations, and various functional accessories for ships. From precise navigation instruments to sturdy and durable life-saving equipment, from comfortable and beautiful cabin interiors to efficient and practical marine tools, every product undergoes strict quality control to ensure compliance with international standards and industry specifications.

The company attaches great importance to technological research and development and innovation. It has formed a research and development team composed of senior maritime engineers, professional technicians, and innovative talents. The team continuously explores cutting-edge technologies, actively introduces new materials and processes, and continuously optimizes product performance to meet the growing intelligent and green demands of the maritime industry. At the same time, the company has established long-term and stable cooperative relationships with many well-known domestic and foreign universities and scientific research institutions. Through the collaborative innovation of industry, university, and research, it accelerates the transformation of scientific research achievements and injects a continuous stream of impetus into the company's development.

With reliable product quality, advanced technological level, and a complete after-sales service system, Qingdao Jincheng Maritime Technology Co., Ltd. has won a good reputation and wide recognition in the industry. Its products not only sell well in major domestic ports and shipbuilding enterprises but also are exported to many countries and regions overseas. The company has established long-term cooperative relationships with many internationally renowned shipping companies. Looking to the future, the company will continue to forge ahead, continuously enhance its core competitiveness, and contribute to the advancement of maritime technology and the development of the global shipping industry.