{"id":7142,"date":"2026-08-15T19:14:30","date_gmt":"2026-08-15T11:14:30","guid":{"rendered":"https:\/\/www.sungda.com\/?p=7142"},"modified":"2026-08-15T19:47:08","modified_gmt":"2026-08-15T11:47:08","slug":"how-to-chooe-right-steel-cord-conveyor-belt","status":"publish","type":"post","link":"https:\/\/www.sungda.com\/index.php\/how-to-chooe-right-steel-cord-conveyor-belt\/","title":{"rendered":"How to Chooe Right Steel Cord Conveyor Belt"},"content":{"rendered":"\n
Scientific Selection of Steel Cord Conveyor Belts: A One\u2011Stop Practical Guideline from Principles to Calculation Steel cord conveyor belts serve as core equipment for bulk material handling in heavy\u2011duty modern industries, widely deployed in coal mining, mineral processing, port terminals, metallurgy, cement manufacturing and power plants for long\u2011distance, high\u2011capacity and high\u2011tension material transportation. For industrial procurement and technical personnel, scientific belt selection directly determines the safety, operational stability, energy consumption and service life of conveyor systems. Following a logical sequence of basic concepts\u2011structural analysis\u2011application matching\u2011formula calculation\u2011comprehensive selection recommendations, this article delivers professional, easy\u2011to\u2011understand and implementable guidelines to support accurate selection for industrial conditions.<\/p>\n\n\n
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<\/figure>\n<\/div>\n\n\n\n
Basic Definition of Steel Cord Conveyor Belts<\/strong> A steel cord conveyor belt is a heavy\u2011duty conveyor belt high\u2011temperature vulcanized with high\u2011strength galvanized steel cords as longitudinal load\u2011bearing reinforcement, encapsulated by special rubber \/ elastomer compounds. It represents a high\u2011grade product distinct from nylon (NN) and polyester (EP) fabric\u2011reinforced conveyor belts. Essentially, metal steel cords provide ultimate tensile performance while rubber cover compounds deliver wear resistance, corrosion protection, impact resistance and bonding protection, forming an integrated structure of \u201chigh\u2011strength reinforcement plus flexible protection\u201d. Product design and inspection comply with ISO\u202f15236 Steel cord conveyor belts. Compared with fabric\u2011reinforced belts, steel cord conveyor belts feature five core advantages: High tensile strength: Longitudinal tensile strength ranges from 630\u202fN\/mm to 5400\u202fN\/mm, far exceeding the upper limit of fabric belts and suitable for ultra\u2011high\u2011tension applications. Long conveying distance: Single\u2011belt installation can reach several kilometres up to more than ten kilometres without intermediate transfer points, greatly simplifying system layout. Heavy load capacity: Capable of transporting high\u2011density and large\u2011size bulk materials with throughput up to thousands of tonnes per hour. Low elongation: Elongation under rated load \u2264\u202f0.25\u202f%, nearly free of plastic deformation, minimizing frequent tension adjustment. Extended service life: Under normal operating conditions, premium products can achieve a service life of 8\u201115\u202fyears, 2\u20113 times that of fabric belts, delivering lower total\u2011life\u2011cycle cost. In short: fabric\u2011reinforced belts apply to short\u2011distance, light\u2011duty and cost\u2011sensitive scenarios; steel cord conveyor belts are mandatory for long\u2011distance, heavy\u2011duty, high\u2011tension and high\u2011reliability conditions.<\/li>\n<\/ol>\n\n\n\n
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Analysis of Key Steel Cord Structure: Determinants of Belt Performance<\/strong> Steel cord reinforcement acts as the \u201cload\u2011bearing backbone\u201d of the belt. Its structural parameters directly govern tensile strength, impact resistance, flex\u2011fatigue performance and corrosion resistance, constituting the core basis for belt selection. All structural indicators shall meet technical requirements for steel cord reinforcement, core rubber and cover rubber specified in ISO\u202f15236\u20111. 2.1 Key Structural Parameters and Performance Impacts Steel cord diameter Diameters range from 2.8\u202fmm to 11.3\u202fmm, increasing with strength grade (e.g. ST1000 matched with \u03c63.4\u202fmm; ST2500 matched with \u03c67.2\u202fmm). Larger cords deliver higher breaking strength per cord and improved overall belt tensile strength and impact resistance. Excessively large cords, however, reduce belt flexibility and aggravate flex\u2011fatigue loss; drum diameter shall be selected in accordance with ISO\u202f15236\u20112. Cord pitch (centre\u2011to\u2011centre distance between adjacent cords) Typical pitch ranges from 10\u202fmm to 17\u202fmm and defines cord arrangement density. Smaller pitch enables more uniform stress distribution and better tear\u2011resistance against local impacts. Excessive pitch raises risks of material penetration and local cracking, and is only fit for light\u2011duty fine\u2011material applications. Breaking strength Ultimate tensile load of individual steel cords, forming the basis for belt strength calculation. The strength grade (ST rating) of steel cord conveyor belts is defined as total breaking strength of all steel cords divided by belt width, in N\/mm. For instance, ST1000 means nominal tensile strength \u2265\u202f1000\u202fN\/mm per millimetre of belt width. ST strength grading follows ISO\u202f15236. Galvanized corrosion\u2011protection grade Steel cord coatings comply with ISO\u202f2232 for cold\u2011drawn galvanized steel wires. Three categories are available: standard galvanized coating for dry indoor service; heavy zinc coating for humid, open\u2011air and salt\u2011fog environments such as ports and underground mines; zinc\u2011aluminium alloy coating for chemically aggressive and saline\u2011alkali conditions to retard wire corrosion and wire breakage. Adhesion strength of core rubber Core rubber fills gaps between steel cords and integrates steel cords with rubber matrix. Adhesion tests follow ISO\u202f252. ISO\u202f15236 specifies that cord\u2011to\u2011rubber bonding performance shall satisfy fatigue\u2011service requirements. Insufficient adhesion will cause delamination and cord pull\u2011out, potentially leading to catastrophic belt rupture. Superior bonding improves flex\u2011fatigue resistance for long\u2011distance layouts with multiple pulleys. 2.2 Correspondence between Structure and Performance \u2011 Tensile strength \u2192 steel cord diameter & total breaking strength \u2011 Impact resistance \u2192 steel cord diameter, cord pitch & cover rubber thickness \u2011 Flex\u2011fatigue resistance \u2192 steel cord flexibility & core\u2011rubber bonding strength \u2011 Corrosion service life \u2192 galvanized coating grade & edge\u2011rubber sealing performance \u2011 Tear resistance \u2192 cord pitch & optional transverse reinforcement layers<\/li>\n<\/ol>\n\n\n\n
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Application\u2011Oriented Matching for Mainstream Industries<\/strong> Cover\u2011rubber performance, reinforcement structure and corrosion protection shall match service conditions, material properties and ambient environment. Wear resistance is tested per ISO\u202f4649, heat resistance per ISO\u202f4195, and flame\u2011retardant and anti\u2011static properties per ISO\u202f340. 3.1 Coal & Mineral Mining (Underground Main Conveyors, Inclined Shafts) \u2011 Core requirements: flame\u2011retardant, anti\u2011static, high tensile strength, tear\u2011resistant, moisture\u2011resistant \u2011 Selection guidelines: Underground belts shall satisfy flame\u2011retardant and anti\u2011static requirements of ISO\u202f340. ST1600\u2011ST4000 grades are adopted for long\u2011distance inclined shafts. Transverse tear\u2011resistant reinforcement is recommended for lump\u2011coal impact conditions, with top cover thickness \u2265\u202f6\u202fmm. 3.2 Port Terminals (Bulk Cargo Handling) \u2011 Core requirements: high tensile strength, wear\u2011resistant, weather\u2011resistant, salt\u2011spray resistant \u2011 Selection guidelines: Heavy\u2011zinc\u2011coated steel cords complying with ISO\u202f2232 for open\u2011air salt\u2011fog exposure. High\u2011wear\u2011resistant cover compounds evaluated by ISO\u202f4649 for coal and ore handling. ST2500\u2011ST5400 grades for long\u2011distance transfer, belt width ranging 800\u20112200\u202fmm. 3.3 Metallurgical Industry (High\u2011Temperature & Heavy\u2011Duty Materials) \u2011 Core requirements: heat\u2011resistant, impact\u2011resistant, burn\u2011resistant \u2011 Selection guidelines: Heat\u2011resistant cover rubber complying with ISO\u202f4195 for sinter and hot materials at 100\u2011150\u202f\u00b0C. Top cover thickness increased to \u2265\u202f8\u202fmm for heavy impact conditions. ST2000\u2011ST3500 grades for combined high\u2011temperature and high\u2011impact service. 3.4 Cement Industry (Limestone & Clinker Transportation) \u2011 Core requirements: wear\u2011resistant, heat\u2011resistant, dust\u2011abrasion resistant \u2011 Selection guidelines: Wear\u2011resistant compounds for limestone; heat\u2011resistant compounds graded per ISO\u202f4195 for clinker. ST1250\u2011ST2500 for long\u2011production\u2011line conveying. Top cover \u2265\u202f6\u202fmm for lump rock. 3.5 Power Generation (Coal\u2011fired Fuel Handling) \u2011 Core requirements: wear\u2011resistant, flame\u2011retardant, high operational reliability \u2011 Selection guidelines: Wear\u2011resistant and flame\u2011retardant formulations referenced to ISO\u202f4649 and ISO\u202f340. ST1000\u2011ST2000 grades. Low\u2011elongation and high\u2011adhesion belts preferred for continuous\u2011run power\u2011plant systems.<\/li>\n<\/ol>\n\n\n\n
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Core Selection Calculations for Industrial Application<\/strong> Belt selection focuses on calculating required tensile grade and belt width to avoid safety risks from under\u2011specification or unnecessary cost from over\u2011specification. Tension and width calculations are based on ISO\u202f5048 Conveyors \u2014 Calculation of operating power and tension. 4.1 Tensile\u2011Strength Calculation Formula: ST\u2265(Fmax<\/sub>\u00d7K)\/B<\/em><\/strong><\/li>\n<\/ol>\n\n\n\n
\u2011 Parameters: \u2011 ST: Steel\u2011cord belt strength grade (N\/mm) per ISO\u202f15236, e.g. ST1000, ST1600, ST2500 \u2011Fmax\u200b<\/sub>: Maximum operating tension of belt (N), calculated according to ISO\u202f5048 based on conveying distance, inclination angle, load and belt speed \u2011 K: Safety factor: 6\u20118 for normal conditions; 8\u201110 for heavy\u2011duty, impact\u2011prone, high\u2011temperature or underground conditions \u2011 B: Belt width (mm) Simplified field estimation: ST\u2265(Maximumconveyingload\u00d7Safetyfactor)\/Effectiveloaded\u00a0area Round\u2011up result to standard ST grades defined in ISO\u202f15236. 4.2 Belt\u2011Width Calculation Formula: B\u2265Q\/(3.6\u00d7v\u00d7\u03c1\u00d7C)<\/em><\/strong><\/p>\n\n\n\n
\u2011 Parameters: \u2011 B: Minimum required belt width (mm) \u2011 Q: Rated throughput (t\/h) \u2011 v: Belt speed (m\/s), typically 1.6\u20114.0\u202fm\/s \u2011 \u03c1: Material bulk density (t\/m\u00b3) \u2011 C: Material cross\u2011section coefficient: 0.85\u20110.95 for trough idlers; 0.5\u20110.6 for flat idlers, values referenced to ISO\u202f5048 Round\u2011up computed width to internationally standardized belt\u2011width series. 4.3 Auxiliary Rule for Cover\u2011Rubber Thickness \u2011 Top (carrying\u2011side) cover: \u2265\u202f4\u202fmm for fine materials; \u2265\u202f6\u202fmm for medium\u2011size materials; \u2265\u202f8\u202fmm for lump materials with heavy impact \u2011 Bottom (return\u2011side) cover: \u2265\u202f4\u202fmm for general use; \u2265\u202f6\u202fmm for long\u2011distance high\u2011friction operation \u2011 According to ISO\u202f15236, cover thickness shall be properly matched to steel\u2011cord diameter for adequate protection and cushioning.<\/p>\n\n\n
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<\/figure>\n<\/div>\n\n\n\n
Comprehensive Selection Recommendations<\/strong> Adopt the four\u2011step logic: Define application conditions \u2192 Calculate key parameters \u2192 Specify cord\u2011rubber configuration \u2192 Validate and finalize model, to achieve accurate, safe and cost\u2011effective selection. Step\u202f1: Clarify application and material characteristics Confirm industry, conveying distance, inclination angle, throughput, lump\u2011size, bulk density, material temperature, ambient humidity and corrosiveness. Determine cover\u2011rubber type (general\u2011purpose, wear\u2011resistant, heat\u2011resistant, flame\u2011retardant, chemical\u2011resistant) and steel\u2011cord coating requirements with performance aligned to corresponding ISO standards. Step\u202f2: Calculate core parameters (strength and width) Compute tension and belt width following ISO\u202f5048. Round\u2011up minimum width and ST rating to international standard series. Prefer standard specifications to mitigate procurement, splicing and spare\u2011part difficulties caused by non\u2011standard custom products. Step\u202f3: Select steel\u2011cord structure and cover\u2011rubber properties \u2011 Match steel\u2011cord diameter and cord pitch with strength grade; adopt larger\u2011diameter cords with smaller pitch for heavy\u2011impact service. \u2011 Select appropriate cord coating grade: heavy\u2011zinc or alloy coatings complying with ISO\u202f2232 for humid, salt\u2011spray and corrosive environments. \u2011 Specify cover\u2011rubber thickness and compound formulation based on material characteristics; ensure wear\u2011resistance, heat\u2011resistance and flame\u2011retardant performance satisfy ISO\u202f4649, ISO\u202f4195 and ISO\u202f340 respectively. Step\u202f4: Validation and final specification Verify safety factor and minimum allowable pulley diameter per ISO\u202f15236\u20112. Steel\u2011cord belts require vulcanized splices; splice design and fabrication follow ISO\u202f15236\u20113. Prioritize products complying with the full set of international standards to guarantee interchangeability and consistent quality for overseas projects and global manufacturing sites. Conclusion Selecting steel cord conveyor belts is far more than specifying catalogue sizes; it represents systematic matching for real\u2011world operating conditions. Procurement and engineering personnel shall keep four core principles in mind: strength guarantees safety, width guarantees throughput, structure guarantees performance, and rubber compound guarantees service life. Supported by ISO\u202f15236, ISO\u202f5048 and other international standards together with the conceptual explanations, structural breakdown, scenario matching and calculation workflows in this article, engineers can complete end\u2011to\u2011end belt selection, achieving safe, energy\u2011efficient conveyor systems with optimized life\u2011cycle cost. List of key international standards: ISO\u202f15236\u20111\/2\/3: Steel cord conveyor belts (Products, selection, splices) ISO\u202f5048: Conveyors \u2014 Calculation of operating power and tension ISO\u202f2232: Cold\u2011drawn galvanized steel wires ISO\u202f252: Conveyor belts \u2014 Adhesion test ISO\u202f4649: Rubber \u2014 Test for abrasion resistance ISO\u202f4195: Heat\u2011resistant conveyor belts ISO\u202f340: Conveyor belts \u2014 Flame\u2011retardant and anti\u2011static tests<\/li>\n<\/ol>\n\n\n\n
Steel cord conveyor belt specification:<\/span><\/p>\n\n\n\n
Strength grade<\/em><\/strong>
<\/td>
Tensile strength (N\/mm)<\/em><\/strong>
<\/td>
Steel Cord pitch (mm)<\/em><\/strong>
<\/td>
Steel Cord diameter (mm)<\/em><\/strong>
<\/td>
Min.breaking force (KN)<\/em><\/strong>
<\/td>
Min.cover thickness (mm)<\/em><\/strong>
<\/td><\/tr>
ST-500
<\/td>
500
<\/td>
10
<\/td>
2.5
<\/td>
5.5
<\/td>
4
<\/td><\/tr>
ST-630
<\/td>
630
<\/td>
10
<\/td>
2.8
<\/td>
7
<\/td>
4
<\/td><\/tr>
ST-800
<\/td>
800
<\/td>
10
<\/td>
3
<\/td>
8.9
<\/td>
4
<\/td><\/tr>
ST-1000 <\/td>
1000 <\/td>
12 <\/td>
3.4 <\/td>
12.9 <\/td>
4
<\/td><\/tr>
ST-1250 <\/td>
1250 <\/td>
12 <\/td>
3.8 <\/td>
16.1 <\/td>
4
<\/td><\/tr>
ST-1400 <\/td>
1400 <\/td>
12 <\/td>
4.3 <\/td>
18 <\/td>
4
<\/td><\/tr>
ST-1600 <\/td>
1600 <\/td>
12 <\/td>
4.7 <\/td>
20.6 <\/td>
4
<\/td><\/tr>
ST-2000 <\/td>
2000 <\/td>
12 <\/td>
5.0 <\/td>
25.6 <\/td>
4
<\/td><\/tr>
ST-2250 <\/td>
2250 <\/td>
12 <\/td>
6.6 <\/td>
29 <\/td>
4
<\/td><\/tr>
ST-2500 <\/td>
2500 <\/td>
15 <\/td>
6.8 <\/td>
40 <\/td>
5
<\/td><\/tr>
ST-2800 <\/td>
2800 <\/td>
15 <\/td>
7 <\/td>
44.8 <\/td>
5
<\/td><\/tr>
ST-3150 <\/td>
3150 <\/td>
15 <\/td>
7.3 <\/td>
50.5 <\/td>
5.5
<\/td><\/tr>
ST-3500 <\/td>
3500 <\/td>
15 <\/td>
8.2 <\/td>
56 <\/td>
6
<\/td><\/tr>
ST-4000 <\/td>
4000 <\/td>
15 <\/td>
8.8 <\/td>
63.5 <\/td>
6.5
<\/td><\/tr>
ST-4500 <\/td>
4500 <\/td>
16 <\/td>
9.7 <\/td>
76.3 <\/td>
7
<\/td><\/tr>
ST-5000 <\/td>
5000 <\/td>
17 <\/td>
10.9 <\/td>
91 <\/td>
7.5
<\/td><\/tr>
ST-5400 <\/td>
5400 <\/td>
17 <\/td>
11.3 <\/td>
98.2 <\/td>
8
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Strength grade<\/em><\/strong>
<\/td>
Tensile strength (N\/mm)<\/em><\/strong>
<\/td>
Steel Cord pitch (mm)<\/em><\/strong>
<\/td>
Steel Cord diameter (mm)<\/em><\/strong>
<\/td>
Min.breaking force (KN)<\/em><\/strong>
<\/td>
Min.cover thickness (mm)<\/em><\/strong>
<\/td><\/tr>
ST-500
<\/td>
500
<\/td>
10
<\/td>
2.5
<\/td>
5.5
<\/td>
4
<\/td><\/tr>
ST-630
<\/td>
630
<\/td>
10
<\/td>
2.8
<\/td>
7
<\/td>
4
<\/td><\/tr>
ST-800
<\/td>
800
<\/td>
10
<\/td>
3
<\/td>
8.9
<\/td>
4
<\/td><\/tr>
ST-1000 <\/td>
1000 <\/td>
12 <\/td>
3.4 <\/td>
12.9 <\/td>
4
<\/td><\/tr>
ST-1250 <\/td>
1250 <\/td>
12 <\/td>
3.8 <\/td>
16.1 <\/td>
4
<\/td><\/tr>
ST-1400 <\/td>
1400 <\/td>
12 <\/td>
4.3 <\/td>
18 <\/td>
4
<\/td><\/tr>
ST-1600 <\/td>
1600 <\/td>
12 <\/td>
4.7 <\/td>
20.6 <\/td>
4
<\/td><\/tr>
ST-2000 <\/td>
2000 <\/td>
12 <\/td>
5.0 <\/td>
25.6 <\/td>
4
<\/td><\/tr>
ST-2250 <\/td>
2250 <\/td>
12 <\/td>
6.6 <\/td>
29 <\/td>
4
<\/td><\/tr>
ST-2500 <\/td>
2500 <\/td>
15 <\/td>
6.8 <\/td>
40 <\/td>
5
<\/td><\/tr>
ST-2800 <\/td>
2800 <\/td>
15 <\/td>
7 <\/td>
44.8 <\/td>
5
<\/td><\/tr>
ST-3150 <\/td>
3150 <\/td>
15 <\/td>
7.3 <\/td>
50.5 <\/td>
5.5
<\/td><\/tr>
ST-3500 <\/td>
3500 <\/td>
15 <\/td>
8.2 <\/td>
56 <\/td>
6
<\/td><\/tr>
ST-4000 <\/td>
4000 <\/td>
15 <\/td>
8.8 <\/td>
63.5 <\/td>
6.5
<\/td><\/tr>
ST-4500 <\/td>
4500 <\/td>
16 <\/td>
9.7 <\/td>
76.3 <\/td>
7
<\/td><\/tr>
ST-5000 <\/td>
5000 <\/td>
17 <\/td>
10.9 <\/td>
91 <\/td>
7.5
<\/td><\/tr>
ST-5400 <\/td>
5400 <\/td>
17 <\/td>
11.3 <\/td>
98.2 <\/td>
8
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Sungda Conveyor Belt Vulcanization Workshops<\/span><\/h3>\n\n\n
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\n\nThe ST1600 steel cord conveyor belt profile ready for package <\/figcaption><\/figure>\n<\/figure>\n<\/div>\n<\/div>\n\n\n
Scientific Selection of Steel Cord Conveyor Belts: A One\u2011Stop Practical Guideline from Principles to CalculationSteel cord conveyor belts serve as core equipment for bulk material handling in heavy\u2011duty modern industries, widely deployed in coal mining, mineral processing, port terminals, metallurgy, cement manufacturing and power plants for long\u2011distance, high\u2011capacity and high\u2011tension material transportation. For industrial procurement […]<\/p>\n","protected":false},"author":1,"featured_media":3825,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[480,39],"class_list":["post-7142","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article","tag-steel-cord","tag-steel-cord-conveyor-belt"],"_links":{"self":[{"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/posts\/7142","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/comments?post=7142"}],"version-history":[{"count":17,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/posts\/7142\/revisions"}],"predecessor-version":[{"id":7169,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/posts\/7142\/revisions\/7169"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/media\/3825"}],"wp:attachment":[{"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/media?parent=7142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/categories?post=7142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sungda.com\/index.php\/wp-json\/wp\/v2\/tags?post=7142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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