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Steel wire rope, a vital component across industries, comes in various categories tailored to distinct needs. Its construction varies, with spiral strands, fiber core, and other configurations impacting strength and flexibility. Materials like stainless steel, galvanized steel, and carbon steel offer corrosion resistance. Diameter choices match load capacities, from light to heavy-duty. Specific applications like cranes, aircraft, elevators, marine, and mining ropes meet industry needs. Lay direction affects rotation resistance. Additional features like coatings, lubrication, and high-temperature resistance customize use. Compliance with safety standards ensures reliability. Understanding these categories aids in selecting the right steel wire rope for lifting, rigging, and anchoring.
Purpose | Minimum Safety Factor |
Elevator | 10 |
Cranes, Hoists, Derricks, Slings | 6 |
Guy Wires, Horizontal Pulls, Traction | 4 |
Main Wire in Aerial Ropeways | 3 |
ISO | Metric | American |
2160 N/mm² | 220 kgf/mm² | Extra Extra Improved Plow Steel (EEIPS) |
1960 N/mm² | 200 kgf/mm² | Extra Improved Plow Steel (EIPS) |
1770 N/mm² | 180 kgf/mm² | Improved Plow Steel (IPS) |
1570 N/mm² | 160 kgf/mm² | Plow Steel (PS) |
1420 N/mm² | 145 kgf/mm² | Traction Steel |
Steel Wire Rope Construction | Description | Common Applications | Alternative Suggestions |
6x19 Filler (6x25 Fi) | Contains 6 strands with 19 or 25 wires each. Known for its flexibility and moderate resistance to wear. | Derrick and boom cranes, tower crane hoists, dredger boom hoists, and drilling rigs | Consider 6x36 for greater flexibility and fatigue resistance in applications that need endurance. |
6x36 | Made of 6 strands with 36 wires each. Highly flexible with strong fatigue resistance, but less abrasion-resistant. | Derrick and boom cranes, tower cranes, dredger ladder hoists | Use 6x19 Filler if you need more abrasion resistance. This option is slightly stiffer. |
18x7 | Features 18 strands with 7 wires each. Offers excellent rotation resistance. | Tower crane hoists, cranes with high lifting requirements | Substitute with 19x7 for similar rotation resistance if extra stability under load is needed. |
19x7 | Built with 19 strands of 7 wires each. Provides high rotation resistance, often used to minimize twisting. | Tower crane hoists, cranes where anti-rotation is essential | Try 18x7 as an alternative for moderate rotation resistance needs. |
6x19 Seale | A single layer of larger outer wires provides higher resistance to wear with moderate flexibility. | Drilling rigs, heavy-duty applications | Consider 6x36 if you prioritize flexibility and fatigue life over abrasion resistance. |
6x7 Galvanized | 6 strands of 7 wires, typically galvanized for corrosion protection. | Sand coring, swabbing, and marine applications | For added durability, consider a plastic-coated option to improve corrosion resistance. |
6x21 Filler | Often has 6 strands with filler wires, usually left-hand lay, offering moderate flexibility and abrasion resistance. | Percussion drilling rigs | Use 6x25 Fi or similar constructions for slightly better fatigue resistance. |
6x21 Seale | Similar to 6x19 but with slightly higher wear resistance due to the Seale arrangement. | General lifting, cranes | Use 6x36 for more flexibility and fatigue resistance if needed. |
6x36 Filler Wire | High-flexibility construction with 36 wires per strand, ideal for environments needing strong endurance against bending fatigue. | Heavy lifting, hoisting, and high-flex applications | For higher wear resistance, try 6x19 with slightly less flexibility. |
7x19 | 7 strands with 19 wires each, providing excellent flexibility, often used for smaller-diameter ropes. | Small pulleys, winches, control cables | Use 6x19 or 6x36 for larger applications that need similar flexibility. |
Rotation-Resistant Ropes (e.g., 35x7) | Designed to resist rotation under load, with multiple strands that minimize twist. | Cranes, hoisting applications with strict rotation control | 18x7 or 19x7 offer good rotation resistance for less demanding needs. |
Finish Type | Corrosion Resistance | Durability | Flexibility | Cost | Best Use Cases |
Galvanized Steel | Moderate | High | Moderate | Affordable | Outdoor use, moderate marine environments |
Stainless Steel | Very High | Very High | High | Expensive | Coastal, offshore, marine, and harsh environments |
Bright Steel | Low | Moderate | High | Economical | Indoor use, controlled environments |
Ungalvanized Steel | Very Low | Moderate to Low | High | Low | Indoor use, temporary applications, or where corrosion is not a concern |
Feature | Competitors | Bull Rope |
Strength | High | Very High |
Flexibility | Low | High |
Lifespan | Moderate | Very High |
Corrosion Resistance
|
Moderate | Very High |
Price | Expensive | Competitive |
Applications | General lifting |
Versatile across all industries
|