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6×37 Steel Wire Rope

The 6-37 Steel Wire Rope is a high-flexibility, multi-strand solution engineered for applications requiring frequent bending and dynamic load handling.

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Specification: DIN/EN/ISO/JISG/BS
6x37+FC, 6x37+WSC or IWRC
Nominal
Diameter
(mm)
Approx Weight(kg/100m) Nominal Tensile Strength(MPa)
1770 1960
Minimum Breaking Strength(kn)
FC IWRC FC IWRC FC IWRC
5 8.56 9.53 13.1 14.1 14.5 15.6
6 12.5 137 18.8 20.3 20.8 22.5
7 17 18.6 25.6 27.6 28.3 30.6
8 22.1 24.4 33.4 36.1 37 40
9 28 30.8 42.3 45.7 44.6 50.6
10 34.6 38.1 52.2 56.4 57.8 62.5
11 41.9 46.1 63.1 68.2 69.9 75.5
12 49.8 54.8 75.1 81.2 83.2 89.9
13 58.5 64.3 88.2 95.2 97.7 105.4
14 67.8 74.6 102 110 112.9 121.8
16 88.6 97.4 134 144 148.4 159.5
18 112 123 169 183 187.1 202.6
20 138 152 209 225

22 167 184 253 273 -
24 199 219 301 325

26 234 257 353 381 - -
28 271 298 409 442

● Standard: GB/T20118-2017

● For vertical well banlance, loading and unloading of ship, fish net dragging and salvaging sunken ship.


Product Overview


Its standard 6×37 construction—6 outer strands, each containing 37 wires (typically in Warrington-Seale lay)—delivers exceptional flexibility while maintaining reliable load capacity. Available in diameters from 5 mm to 60 mm, it offers tensile strength of 1570 MPa to 1960 MPa, complying with ISO 9001 and GB/T 20118 standards. The 37-wire strands (smaller wire diameter than 6×19 ropes) enable use with small pulleys (≥16× rope diameter), and the rope supports both fibre core (FC) and steel core (SC) options for tailored performance. This rope is ideal for dynamic applications like overhead cranes, elevators (light-duty), and entertainment rigging, where flexibility and fatigue durability are critical.


6×37 Steel Wire Rope


Product Features


High-Flexibility Design

37-Wire Strand Advantage: 37 smaller wires per strand (vs. 19 in 6×19) enhance flexibility, allowing bending around pulleys as small as 16× rope diameter—perfect for overhead cranes with tight pulley systems.

Warrington-Seale Lay: This lay pattern balances wire size (alternating small/large wires) to maximize metal fill factor (85%) while maintaining flexibility, reducing fatigue failure by 30% in high-cycle use.


Core Option Versatility

Fibre Core (FC): Reduces weight by 15% and enhances shock absorption, suitable for light-duty dynamic applications (e.g., entertainment rigging, small elevators).

Steel Core (SC): Increases tensile strength by 20% and reduces elongation to ≤1.5%, ideal for medium-duty dynamic lifting (e.g., factory overhead cranes, delivery truck lifts).


Applications


Industrial Dynamic Lifting

6×37 (10-40 mm diameter, SC core) powers factory overhead cranes (for machine parts, assembly lines) and automotive production line hoists—its flexibility allows smooth spooling on multi-layer drums, and SC core resists heavy load elongation.


Entertainment & Light Elevators

6×37 (5-16 mm diameter, FC core) is used in theater rigging (stage curtains, lighting) and residential small elevators (≤500 kg capacity)—its lightweight FC core and high flexibility enable precise, quiet operation (≤55 dB).


FAQ


Why is 6×37 more flexible than 6×19?

6×37 uses 37 smaller wires per strand (vs. 19 larger wires in 6×19), reducing wire rigidity and enabling bending around smaller pulleys—critical for dynamic applications like overhead cranes.


What is the minimum breaking load for a 16 mm 6×37 (FC) rope?

At 1770 MPa tensile strength, the 16 mm 6×37 (FC) rope has a minimum breaking load of 280 kN, suitable for 56 kN safe working load (5:1 safety factor) in theater rigging or small elevators.


How to maintain this rope in high-cycle use?

Inspect every 4 weeks for wire fraying (focus on pulley contact points); reapply lubricant (every 3 months) to reduce friction—this extends service life by 25% in industrial overhead crane applications.


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Jiangsu Fengying New Material Technology Co., Ltd. was established in 2024. It is a professional manufacturer mainly engaged in steel wire ropes and related products.

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