Steel Core Conveyor Belt
Steel Cord Conveyor Belt
A rubber conveyor belt reinforced with a steel wire rope skeleton, built for large tensile strength, high impact resistance, small elongation and long service life — the standard choice for long-distance, large-haul, high-speed conveying in coal, mining, port and metallurgy operations._1788753034_WNo_800d800.jpg)
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A steel skeleton built into the rubber, not just laid on top
Wire rope conveyor belt is a rubber conveyor belt that uses steel wire rope as its load-bearing skeleton instead of woven fabric plies. The belt is built up from four layers — core rubber, the steel wire rope reinforcement itself, the covering rubber layer, and the edge rubber — bonded into a single carcass. This construction is what gives the belt its large tensile strength, good impact resistance, small elongation, good troughability and good flex fatigue resistance compared with fabric-ply belting of the same duty. Because elongation stays low even under heavy load, the belt is the standard specification for anti-tear material handling over long distances, large spans, high volumes and high speeds — conditions where a fabric belt would stretch, mistrack or fail well before a steel cord construction does. It is widely used across coal mines, metal mines, ports, electric power, metallurgy and building materials industries.- Core reinforcementSteel wire rope (cord), not fabric ply
- Belt makeupCore rubber + steel cord + cover rubber + edge rubber
- Belt strength rangeST630 to ST6300
- Elongation at break400–450% (per GB700-88 / DIN22131-88)
- Applicable standardsGB9770-88, GB700-88, DIN22131-88
- Best suited forLong distance, large haul, high-speed conveying
What the steel cord construction gives you
Every advantage of this belt type traces back to one design choice: a continuous steel wire rope skeleton running the length of the belt in place of woven fabric.Large tensile strength
Steel cord breaking strength runs from 6.93 kN/piece on ST-630 up to 124.74 kN/piece on ST-6300, giving the belt carcass strength fabric plies can't match at the same thickness.
Small elongation
Elongation at break stays in the 400–450% range across GB and DIN grades, so the belt holds its length and tracking under sustained heavy load instead of stretching out of spec.
Good impact & flex resistance
The rope-and-rubber carcass absorbs loading impact and tolerates repeated flexing over pulleys without the cord-to-rubber bond breaking down.
Good troughability
The steel cord layout and rubber gauge are set out so the belt troughs cleanly on standard idler sets rather than fighting the frame.
Belt strength specifications (ST-630 to ST-6300)
Cord diameter, cord structure, pitch, working tension and minimum pulley diameter scale together with belt strength — the full construction table below is what we quote from.| Belt strength | Cord diam. d (mm) | Cord structure | Pitch P (mm) | Working tension (N/mm) | Cover thickness t1/t2 (mm) | Belt weight (kg/m²) | Min. pulley diam. (mm) | Cord strength (kN/piece) |
|---|---|---|---|---|---|---|---|---|
| ST-630 | 3.0 | 6*7+1WS | 10 | 90 | 5*5 | 20.0 | 800 | 6.93 |
| ST-800 | 3.5 | 6*7+1WS | 10 | 110 | 5*5 | 20.6 | 800 | 8.8 |
| ST-1000 | 4.0 | 6*7+1WS | 12 | 140 | 6*6 | 24.7 | 800 | 13.2 |
| ST-1250 | 4.5 | 6*7+1WS | 12 | 175 | 6*6 | 25.4 | 800 | 16.5 |
| ST-1600 | 5.0 | 6*19+1WS | 12 | 225 | 6*6 | 26.0 | 1000 | 21.12 |
| ST-2000 | 6.0 | 6*19+1WS | 12 | 285 | 8*6 | 30.0 | 1000 | 26.4 |
| ST-2500 | 7.5 | 6*19W+1WS | 15 | 355 | 8*6 | 32.2 | 1250 | 41.25 |
| ST-3150 | 8.1 | 6*19W+1WS | 15 | 450 | 8*8 | 35.7 | 1400 | 51.98 |
| ST-4000 | 9.1 | 6*19W+1WS | 17 | 570 | 8*8 | 37.8 | 1600 | 74.8 |
| ST-4500 | 9.7 | 6*19W+1WS | 16 | 645 | 8*8 | 38.7 | 1800 | 79.2 |
| ST-5000 | 10.9 | 6*19W+1WS | 17 | 715 | 8.5*8.5 | 41.9 | 1800 | 93.5 |
| ST-5400 | 11.3 | 6*19W+1WS | 17 | 760 | 9*9 | 43.9 | 2000 | 101 |
| ST-6300 | 12.3 | 6*19W+1WS | 18 | 900 | 10*10 | 48.3 | 2000 | 124.74 |
| Standard | ST600 | ST800 | ST1000 | ST1250 | ST1600 | ST2000 | ST2500 | ST3150 | ST4000 |
|---|---|---|---|---|---|---|---|---|---|
| GB9770-88 (N/mm) | 54 | 60 | 64 | 69 | 74 | 84 | 98 | 108 | 118 |
| DIN22131-88 (N/mm) | 60 | 70 | 80 | 95 | 105 | 105 | 130 | 140 | 145 |
Number of steel cords by belt width
Cord count per belt width is fixed by grade to keep cord spacing (pitch) within the specified range — this is what determines how a given width is actually built, not just cut to size.| Width (mm) | ST600/800 | ST1000–2000 | ST2500/3150 | ST4000 | ST4500/5000 | ST5400 | ST6300 |
|---|---|---|---|---|---|---|---|
| 800 | 75 | 63 | 50 | — | — | — | — |
| 1000 | 95 | 79 | 64 | 56 | 60/56 | 56 | 52 |
| 1200 | 113 | 94 | 76 | 68 | 72/68 | 68 | 63 |
| 1400 | 133 | 111 | 89 | 79 | 84/79 | 79 | 74 |
| 1600 | 151 | 126 | 101 | 91 | 96/91 | 91 | 85 |
| 1800 | 171* | 143 | 114 | 103 | 107/103 | 103 | 96 |
| 2000 | — | 159 | 128 | 114 | 120/114 | 114 | 107 |
| 2200 | — | 176** | 141 | 125 | 133/125 | 125 | 118 |
| 2400 | — | 193** | 155 | 137 | 146/137 | 137 | 129 |
Rubber cover physical properties
Cover compound is available across five duty classes to match abrasion, cut and gouge conditions on site.| Test item | Unit | GB Class H | GB Class M | DIN Class W | DIN Class X | DIN Class Y |
|---|---|---|---|---|---|---|
| Tensile strength | MPa, min | 17.65 | 13.73 | 18 | 25 | 20 |
| Elongation at break | %, min | 450 | 400 | 400 | 450 | 400 |
| Change after aging (strength & elongation) | % | -25 to +250 | -25 to +250 | -25 to +250 | -25 to +250 | -25 to +250 |
| Abrasion loss | max | 0.6 cm³/1.61km | 0.8 cm³/1.61km | 90 cm³ | 120 cm³ | 150 cm³ |
Built for coal, mining, port & metallurgy handling
Wherever material has to move long distances, at high speed, in large volumes, or under conditions that would tear a fabric belt, steel cord construction is the standard specification.- Coal mine underground & surface conveying
- Metal & non-metal mining operations
- Port & bulk terminal material handling
- Electric power plant coal & ash handling
- Metallurgy & steel plant raw material lines
- Building materials & cement production
- Long-distance overland conveyor systems
- Large-span, high-volume bulk transport
- High-speed conveying lines
- Anti-tear material handling applications
Why source from us
Manufactured to order and exported worldwide, with specifications verified against your line before production.Common questions
How is a steel cord belt different from a fabric (multi-ply) conveyor belt?
Fabric belts rely on woven textile plies for tensile strength and stretch more under load. A steel cord belt replaces those plies with a continuous steel wire rope skeleton, giving far higher tensile strength (up to ST-6300) with much lower elongation at break, which is why it's specified for long-distance, high-tension, high-speed lines.
How do I choose the right ST grade for my line?
ST grade is selected from your required belt tension, conveying distance, incline, and load — send us your conveyor length, lift, capacity and material type and we'll recommend the matching strength grade and construction from the table above.
What cover rubber class should I specify?
Class selection depends on how abrasive, sharp or high-impact your material is. Class H/W suits general abrasive duty, while X/Y grades are specified for higher-impact or gouging material such as run-of-mine ore.
Is the minimum pulley diameter a hard limit?
Yes — running a steel cord belt over a pulley smaller than the minimum listed for its grade accelerates cord fatigue and shortens belt life, so pulley sizing should be checked against the belt strength grade before installation.
What information do you need to quote a steel cord belt?
Required belt strength (or conveyor length/lift/capacity so we can calculate it), belt width, cover rubber class, and any standard you need to match (GB or DIN).
