6×31WS Steel Wire Rope

6×31WS Steel Wire Rope Sizes:

6×31WS Steel Wire Rope Sizes

Nominal Diameter	Weight (kg/100m)			Nominal Tensile Strength of Rope (MPA)
				1570		1670		1770		1870		1960
				Minimum Breaking Load of Rope (kn)
(mm)	NF	SF	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS	FC	IWR/IWS
6	13.7	13.4	15	18.6	20.1	19.8	21.4	21	22.6	22.2	23.9	23.2	25.1
8	24.3	23.7	26.8	33.2	35.8	35.3	38	37.4	40.3	39.5	42.6	41.4	44.6
9	30.8	30.1	33.9	42	45.3	44.6	48.2	47.3	51	50	53.9	52.3	56.5
10	38	37.1	41.8	51.8	55.9	55.1	59.5	58.4	63	61.7	66.6	64.6	69.7
11	46	44.9	50.6	62.7	67.6	66.7	71.9	70.7	76.2	74.7	80.6	78.2	84.4
12	54.7	53.4	60.2	74.6	80.5	79.4	85.6	84.1	90.7	88.9	95.5	93.1	100
13	64.2	62.7	70.6	87.6	94.5	93.1	100	98.7	106	104	113	109	118
14	74.5	72.7	81.9	102	110	108	117	114	124	121	130	126	136
16	97.3	95	107	133	143	141	152	150	161	158	170	165	178
18	123	120	135	168	181	179	193	189	204	200	216	209	226
20	152	148	167	207	224	220	238	234	252	247	266	258	279
22	184	180	202	251	271	267	288	283	305	299	322	313	337
24	219	214	241	298	322	317	342	336	363	355	383	372	402
26	257	251	283	350	378	373	402	395	426	417	450	437	471
28	298	291	328	406	438	432	466	458	494	484	522	507	547
30	342	334	376	466	503	496	535	526	567	555	599	582	627
32	389	380	428	531	572	564	609	598	645	632	682	662	714
34	439	429	483	599	646	637	687	675	728	713	770	747	806
36	492	481	542	671	724	714	770	757	817	800	863	838	904
38	549	536	604	748	807	796	858	843	910	891	961	933	1007
40	608	594	669	829	894	882	951	935	1010	987	1070	1034	1116
42	670	654	737	914	986	972	1050	1030	1110	1090	1170	1140	1230
44	736	718	809	1000	1080	1070	1150	1130	1220	1190	1290	1252	1350
46	804	785	884	1100	1180	1170	1260	1240	1330	1310	1410	1368	1476
48	876	855	963	1190	1290	1270	1370	1350	1450	1420	1530	1490	1607
50	950	928	1050	1300	1400	1380	1490	1460	1580	1540	1660	1617	1744
52	1030	1000	1130	1400	1510	1490	1610	1580	1700	1670	1800	1748	1886
54	1110	1080	1220	1510	1630	1610	1730	1700	1840	1800	1940	1886	2034
56	1190	1160	1310	1620	1750	1730	1860	1830	1980	1940	2090	2028	2188
58	1280	1250	1410	1740	1880	1850	2000	1960	2120	2080	2240	2175	2347
60	1370	1340	1500	1870	2010	1980	2140	2100	2270	2220	2400	2328	2511

What is 6×31WS Steel Wire Rope and Why Should You Care?

Do you struggle to find the right wire rope for your heavy lifting equipment? Choosing the wrong cable leads to equipment failure, costly downtime, and serious safety hazards on your job site.

The 6×31WS steel wire rope is a specific construction featuring six strands with 31 wires each in a Warrington-Seale pattern. It offers a great mix of flexibility and abrasion resistance, making it an ideal choice for general engineering, crane operations, and heavy lifting tasks where reliability is non-negotiable.

I know that sifting through technical jargon can feel like a headache when you need to get the job done. I want to make this simple for you so you can choose the best gear without any guesswork.

What do these numbers actually mean for your lifting jobs?

Are you confused by the technical code name of your wire rope? Many of my clients get overwhelmed by these labels and end up buying the wrong product for their specific machinery.

The “6×31WS” code breaks down into simple, manageable parts that tell you exactly how the rope is built. It is not just random math. It describes the steel’s physical architecture.

The “6” tells you the rope has six outer strands wrapped around a core. The “31” indicates that each of the six strands contains 31 individual steel wires. The “WS” is the most important part for performance. It stands for “Warrington-Seale.” This is a specific arrangement of the wires inside the strand. Warrington-Seale construction mixes different wire sizes and patterns. It combines the flexibility of a Warrington design with the wear resistance of a Seale design.

Component	Meaning	Function
6	Number of Strands	Provides the main rope structure.
31	Number of Wires	Affects flexibility and surface area.
WS	Warrington-Seale	Controls the internal geometry of wires.

This construction is smart. It places smaller wires inside for flexibility. It places larger, thicker wires on the outside. These thick outer wires resist rubbing and scraping. This makes the rope last much longer in tough environments.

How does the 6×31WS construction improve your lifting performance?

Do you want to know if this rope will actually hold up under the heavy loads you move every day? The wrong rope snaps under pressure or wears out way too fast.

The 6×31WS wire rope balances two competing needs: flexibility and strength. Most standard ropes force you to choose one or the other. If you choose a very strong, thick rope, it becomes too stiff and breaks when bent over pulleys. If you choose a very flexible rope, it often wears out quickly because the wires are too thin.

The Warrington-Seale design solves this compromise. Using larger outer wires helps the rope withstand abrasion. It drags against sheaves and drums without fraying immediately. Meanwhile, the internal structure allows the rope to bend without snapping under tension. This is critical for crane operators and anyone managing heavy loads. You get a rope that not only holds the weight but also moves smoothly through your machinery. This helps you avoid the frequent replacements that eat into your profits. You save money on maintenance and keep your workflow steady.

Is the 6×31WS wire rope the right choice for your specific project?

Are you worried about using this rope in the wrong application and risking a safety violation? Many buyers assume all wire ropes work for all machines, but that is a dangerous mistake.

This specific rope is a workhorse. I often recommend it for applications that require a balance of high breaking strength and good fatigue resistance. Think of cranes, hoists, and ship loading equipment. These machines move heavy loads and require frequent bending over sheaves. A simple 6×19 rope might be too stiff, and a 6×37 rope might be too flimsy for certain high-abrasion tasks. The 6×31WS sits right in the “sweet spot” for many of my industrial clients.

It performs well in vertical wells, ship loading, and complex rigging. It handles the constant cycle of bending and straightening. If your equipment uses smaller sheaves, this rope is usually a better fit than stiffer alternatives. However, you must always check your equipment manual. Do not guess. You need to match the rope diameter and the construction type to the drum and pulley system. Using the right rope keeps your staff safe and ensures your equipment runs at peak performance.

How can you verify the quality of your 6×31WS wire rope?

Do you fear getting cheated by suppliers who sell low-quality steel disguised as premium products? We all know that certificate fraud and poor-quality wire are massive issues in our industry today.

As a business owner, you cannot afford to have a rope fail during a lift. You must take control of the procurement process. Always ask for full, traceable documentation. When I talk to my clients, I stress that the “deal” price is not the only cost. A cheap rope that snaps is the most expensive purchase you will ever make. You need a supplier who provides clear certifications.

Look for mill test reports. Ensure the galvanization is even, and the wires are clean. If a price looks too good to be true, it probably is. I recommend performing a physical inspection upon arrival. Check for uniformity. Is the core consistent? Is the rope diameter the same from one end to the other? Do not rely on luck. You need a trusted partner who treats quality as a non-negotiable standard. This protects your reputation and, more importantly, your workers on the ground.

Conclusion

The 6×31WS wire rope provides an excellent balance of durability and flexibility for demanding lifting tasks. Always verify your certifications and match the construction type to your specific equipment needs.