8×55 Class Round Strand Wire Rope

8×55 Class Round Strand Wire Rope

Product Introduction:

Engineered for ultra-heavy-duty marine and offshore operations, our 8×55 Class Round Strand Wire Rope (construction code 8×55SWS) sets a new benchmark for strength, durability, and operational reliability. Manufactured in strict compliance with GB/T 20067-2006 — the Chinese national standard for large-diameter steel wire ropes — this rope is purpose-built for the most extreme lifting, mooring, and towing applications in shipbuilding, offshore engineering, deep-sea salvage, and heavy industrial sectors.

The 8×55SWS construction features an 8-strand design with 55 wires per strand, arranged through an advanced compacted and swaged (SWS) manufacturing process. This unique 8-strand configuration offers several distinct advantages over traditional 6-strand ropes:

1.Superior rotational resistance — the 8-strand geometry significantly reduces rope rotation under load, making it ideal for single-fall hoisting and multi-layer drum winding

2.Excellent spooling characteristics — provides smoother winding and reduced wear on drums and sheaves

3.Enhanced fatigue resistance — the higher number of strands distributes load more evenly across the rope's cross-section, extending service life in high-cycle applications

The SWS (Swaged Strand) process compacts the outer wires uniformly around the core, resulting in a smooth, dense surface that offers exceptional resistance to abrasion and crushing. This creates a combination of point and linear contact between wires, delivering superior breaking strength and flexibility compared to conventional round-strand ropes.

Two core configurations are available to match specific operational requirements:

*FC (Fiber Core) – provides natural elasticity and shock absorption, reducing peak dynamic loads and offering excellent flexibility. The fiber core also retains lubrication longer, reducing maintenance frequency in moderate to heavy-duty cycles.

*IWR (Independent Wire Rope Core) – delivers a higher metallic cross-sectional area, superior crush resistance, and maximum breaking strength. This configuration is the preferred choice for extreme heavy-lift operations, deep-sea mooring, and applications requiring maximum tensile capacity and resistance to external pressure.

Technical Specifications：

The rope is available in diameters ranging from 40 mm to 160 mm — a significantly broader range than our 6-strand products, accommodating both medium-duty and ultra-heavy-lift requirements. Tensile strength grades of 1670, 1770, 1870, and 1960 MPa are offered to suit diverse operational demands.

The 8-strand design offers a smoother outer surface, reducing friction and extending the life of both the rope and mating equipment. Available surface finishes include bright, galvanized, and specially lubricated options for enhanced corrosion resistance in seawater and humid environments.

Typical Applications Include:

*Ultra-large shipbuilding gantry and floating cranes.

*Deep-sea mooring systems and towlines.

*Offshore platform cranes and subsea lift operations.

*Dredging and underwater salvage.

*Heavy industrial mining and hoisting.

*Container ship and bulk carrier deck machinery.

Every production batch undergoes rigorous quality control — from raw material wire rod inspection through to final proof-load testing. Our ropes can be supplied with certifications from leading classification societies including API-9A, ISO 9001, CCS, ABS, DNV, LR, and CE, ensuring full traceability and compliance with global marine standards.

With its advanced 8-strand SWS construction, broader diameter range, and exceptional breaking strength, the 8×55 Class Round Strand Wire Rope represents the ultimate choice for marine and heavy-industry professionals who demand uncompromising performance in the world's most challenging lifting and mooring environments.