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18×7 Class Round Strand Wire Rope

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Product Description

18×7 Class Round Strand Wire Rope


Product Introduction:

Engineered for critical maritime lifting and haulage, our 18×7 Class Round Strand Wire Rope represents a specialized, high-performance cable solution. Unlike traditional 6-strand ropes, the 18-strand construction is specifically designed to deliver exceptional anti-rotation (non-spin) properties, effectively minimizing the risk of twisting, bird-caging, and load spinning during complex lifting operations. This makes it the premium choice for single-line crane systems and high-speed deck winches operating in demanding shipboard environments.


Construction & Core Configurations:

The 18×7 configuration consists of 18 strands, each made of 7 individual wires, delicately spiraled around a core. This high-strand-count structure offers a uniquely balanced combination of outstanding bending flexibility and robust fatigue resistance. Based on your requirements, this rope class is available in two distinct core designs:


*18×7 + FC (Fibre Core): Featuring a high-quality natural or synthetic fiber core, this variant provides superior pliability and excellent shock-absorption capabilities. With a lower net weight compared to its steel-core counterpart, it is easier to handle and spool, making it ideal for general marine cargo handling and lighter-duty tow lines.


*18×7 + IWS (Independent Wire Strand Core): Built with an independent 7-wire steel strand at its center, this configuration significantly enhances resistance to radial compression and crushing. The IWS core ensures structural integrity when the rope is subjected to heavy multi-layer winding on winch drums, making it highly durable for heavy-duty port crane operations and offshore platform haulage.


Technical Specifications：

Construction: 18×7+FC,18×7+IWS
Standard: GB/T20118-2017,GB/T8918-2006
Nominal Diameter Approx.Weight Minimun Breaking Load of Rope(KN)
mm kg/100m 1670MPa 1770MPa 1870MPa 1960MPa 2160MPa
D FC IWS FC IWS FC IWS FC IWS FC IWS FC IWS
6 14 15.5 18.6 19.7 19.8 20.9 20.9 22.1 21.9 23.1 24.1 25.5
7 19.1 21.1 25.4 26.8 26.9 28.4 28.4 30.1 29.8 31.5 32.8 34.7
8 25 27.5 33.1 35.1 35.1 37.2 37.1 39.3 38.9 41.1 42.9 45.3
9 31.6 34.8 41.9 44.4 44.4 47 47 49.7 49.2 52.1 54.2 57.4
10 39 43 51.8 54.8 54.9 58.1 58 61.3 60.8 64.3 67 70.8
11 47.2 52 62.6 66.3 66.4 70.2 70.1 74.2 73.5 77.8 81 85.7
12 56.2 61.9 74.5 78.9 79 83.6 83.5 88.3 87.5 92.6 96.4 102
13 65.9 72.7 87.5 92.6 92.7 98.1 98 104 103 109 113 120
14 76.4 84.3 101 107 108 114 114 120 119 126 131 139
16 99.8 110 133 140 140 149 148 157 156 165 171 181
18 126 139 168 177 178 188 188 199 197 208 217 230
20 156 172 207 219 219 232 232 245 243 257 268 283
22 189 208 251 265 266 281 281 297 294 311 324 343
24 225 248 298 316 316 334 334 353 350 370 386 408
26 264 291 350 370 371 392 392 415 411 435 453 479
28 306 337 406 429 430 455 454 481 476 504 525 555
30 351 387 466 493 494 523 522 552 547 579 603 638
32 399 440 530 561 562 594 594 628 622 658 686 725
34 451 497 598 633 634 671 670 709 702 743 774 819
36 505 557 671 710 711 752 751 795 787 833 868 918
38 563 621 748 791 792 838 837 886 877 928 967 1020
40 624 688 828 876 878 929 928 981 972 1030 1070 1130
42 688 759 913 966 968 1020 1020 1080 1070 1130 1180 1250
44 755 832 1000 1060 1060 1120 1120 1190 1180 1240 1300 1370
46 825 910 1100 1160 1160 1230 1230 1300 1290 1360 1420 1500
48 899 991 1190 1260 1260 1340 1340 1410 1400 1480 1540 1630
50 975 1080 1290 1370 1370 1450 1450 1530 1520 1610 1670 1770
52 1050 1160 1400 1480 1480 1570 1570 1660 1640 1740 1810 1920
54 1140 1250 1510 1600 1600 1690 1690 1790 1770 1870 1950 2070
56 1220 1350 1620 1720 1720 1820 1820 1920 1910 2020 2100 2220
58 1310 1450 1740 1840 1850 1950 1950 2060 2040 2160 2250 2380
60 1400 1550 1860 1970 1980 2090 2090 2210 2190 2310 2410 2550


Primary Marine & Industrial Applications:

Due to its inherent anti-twist nature and high flexibility, this 18×7 class is predominantly used in:

*Shipboard and dock-side crane hoisting (single-part lifting).

*Tugboat towing and salvage haulage.

*Offshore crane booms and deep-sea platform rigging.

*Multi-layer winch systems where kink-resistance is critical.

*High-speed lifting elevators and gantry cranes in heavy maritime ports.


Operational Advantages & Maintenance:

The 18×7 design offers a significantly extended fatigue life when operating over smaller sheaves and drums. For optimum safety and lifespan, we recommend regular inspections for external wear. When using the +IWS variant, special attention should be paid to maintaining correct tension to prevent core slippage, and a regular lubrication schedule is mandatory to protect both the outer strands and internal steel core from harsh saltwater corrosion.

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