{"id":875,"date":"2026-08-17T05:47:12","date_gmt":"2026-08-17T05:47:12","guid":{"rendered":"https:\/\/engineer-class-chain.com\/?post_type=product&p=875"},"modified":"2026-08-17T10:05:21","modified_gmt":"2026-08-17T10:05:21","slug":"mining-compact-chain-gb-t-12718-mt-t-929-grade-c-d-22x86-to-60x197-mm","status":"publish","type":"product","link":"https:\/\/engineer-class-chain.com\/de\/product\/mining-compact-chain-gb-t-12718-mt-t-929-grade-c-d-22x86-to-60x197-mm\/","title":{"rendered":"Mining Compact Chain \u2013 GB\/T 12718 & MT\/T 929 | Grade C & D | 22\u00d786 to 60\u00d7197 mm"},"content":{"rendered":"

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Ever-power Engineer Class Chain Co., Ltd<\/p>\n

Mining Compact Chain<\/h2>\n

20Mn2 \/ 25MnV \/ 23MnNiMoCr54 \u00a0\u00b7\u00a0 Grade C & D \u00a0\u00b7\u00a0 GB\/T 12718 & MT\/T 929<\/p>\n

Compact-profile traction chain for scraper conveyors and armoured face conveyors. Diameter range 22\u00d786 to 60\u00d7197 mm. Manufactured from high-strength alloy steel with precision welding and quench-temper heat treatment throughout.<\/p>\n

View Specifications<\/a><\/div>\n<\/div>\n
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\"Mining<\/p>\n

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Certified by \u00a0|\u00a0 Lloyd’s Register \u00a0\u00b7\u00a0 ABS \u00a0\u00b7\u00a0 Bureau Veritas \u00a0\u00b7\u00a0 DNV \u00a0\u00b7\u00a0 ISO 9001 \u00a0\u00b7\u00a0 ISO 14001 \u00a0\u00b7\u00a0 MA Mining Safety Mark<\/p>\n<\/section>\n

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Product Overview<\/p>\n

What Is a Mining Compact Chain?<\/h2>\n

Mining compact chains are designed as the core traction component for scraper conveyors and armoured face conveyors (AFC) in coal and hard-rock mining. The compact profile \u2014 where alternate vertical links have flattened sides \u2014 reduces the overall chain height compared to an equivalent round link chain, allowing fitment in conveyors with tighter trough clearances.<\/p>\n

Ever-power Engineer Class Chain Co., Ltd manufactures compact chains from 20Mn2<\/strong>, 25MnV<\/strong>, and 23MnNiMoCr54<\/strong> alloy steel, processed through precision blanking, braiding, flash butt welding, and quench-temper heat treatment to strengthen the link structure. The product range covers chain diameters from 22\u00d786 to 60\u00d7197 mm<\/strong>, in Grade C and Grade D.<\/p>\n

All chains are manufactured to GB\/T 12718-2009<\/strong> and MT\/T 929-2004<\/strong> industry standards. Each batch passes multi-stage inspection including welding-seam quality checks and heat-treatment uniformity verification before dispatch.<\/p>\n<\/div>\n

\"Ever-power<\/div>\n<\/section>\n

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Technical Data<\/p>\n

Dimensional Specifications<\/h2>\n

Reference standards: GB\/T 12718-2009 \u00b7 MT\/T 929-2004 \u00a0|\u00a0 All dimensions in mm \u00b7 Weight in kg\/m<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Diameter d\u00d7p (mm)<\/th>\nDiameter Tol. (mm)<\/th>\nPitch Tol. (mm)<\/th>\nMax. Thickness (mm)<\/th>\nFlat Link Min. Inner W. (mm)<\/th>\nFlat Link Max. Outer W. (mm)<\/th>\nRound Link Min. Inner W. (mm)<\/th>\nRound Link Max. Outer W. (mm)<\/th>\nWeight (kg\/m)<\/th>\n<\/tr>\n<\/thead>\n
22\u00d786<\/td>\n\u00b10.7<\/td>\n\u00b10.9<\/td>\n26<\/td>\n26<\/td>\n77<\/td>\n26<\/td>\n60<\/td>\n8.9<\/td>\n<\/tr>\n
26\u00d792<\/td>\n\u00b10.8<\/td>\n\u00b10.9<\/td>\n27<\/td>\n30<\/td>\n86<\/td>\n30<\/td>\n74<\/td>\n12.8<\/td>\n<\/tr>\n
30\u00d7108<\/td>\n\u00b10.9<\/td>\n\u00b11.0<\/td>\n33<\/td>\n34<\/td>\n98<\/td>\n34<\/td>\n86<\/td>\n18<\/td>\n<\/tr>\n
34\u00d7126<\/td>\n\u00b11.0<\/td>\n\u00b11.2<\/td>\n37<\/td>\n38<\/td>\n109<\/td>\n38<\/td>\n97<\/td>\n23<\/td>\n<\/tr>\n
38\u00d7137<\/td>\n\u00b11.1<\/td>\n\u00b11.4<\/td>\n42<\/td>\n42<\/td>\n121<\/td>\n42<\/td>\n110<\/td>\n28.5<\/td>\n<\/tr>\n
42\u00d7146<\/td>\n\u00b11.3<\/td>\n\u00b11.5<\/td>\n46<\/td>\n46<\/td>\n135<\/td>\n46<\/td>\n115<\/td>\n34.2<\/td>\n<\/tr>\n
48\u00d7152<\/td>\n\u00b11.5<\/td>\n\u00b11.5<\/td>\n56<\/td>\n61<\/td>\n163<\/td>\n53<\/td>\n128<\/td>\n45<\/td>\n<\/tr>\n
52\u00d7170<\/td>\n\u00b11.6<\/td>\n\u00b11.7<\/td>\n63.5<\/td>\n65<\/td>\n177<\/td>\n57<\/td>\n135<\/td>\n53.8<\/td>\n<\/tr>\n
56\u00d7187<\/td>\n\u00b11.9<\/td>\n\u00b12.3<\/td>\n65<\/td>\n70<\/td>\n188<\/td>\n60<\/td>\n146<\/td>\n59<\/td>\n<\/tr>\n
60\u00d7197<\/td>\n\u00b12.0<\/td>\n\u00b12.0<\/td>\n70<\/td>\n72<\/td>\n198<\/td>\n63<\/td>\n156<\/td>\n66<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n

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Load Specifications \u2013 Grade C & D<\/h2>\n

Test load and minimum breaking load in kN per nominal size<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Diameter d\u00d7p (mm)<\/th>\nGrade C<\/th>\nGrade D<\/th>\n<\/tr>\n
Test Load (kN)<\/th>\nMin. Breaking (kN)<\/th>\nTest Load (kN)<\/th>\nMin. Breaking (kN)<\/th>\n<\/tr>\n<\/thead>\n
22\u00d786<\/td>\n490<\/td>\n610<\/td>\n610<\/td>\n760<\/td>\n<\/tr>\n
26\u00d792<\/td>\n680<\/td>\n850<\/td>\n850<\/td>\n1060<\/td>\n<\/tr>\n
30\u00d7108<\/td>\n900<\/td>\n1130<\/td>\n1130<\/td>\n1410<\/td>\n<\/tr>\n
34\u00d7126<\/td>\n1160<\/td>\n1450<\/td>\n1450<\/td>\n1810<\/td>\n<\/tr>\n
38\u00d7137<\/td>\n1450<\/td>\n1810<\/td>\n1810<\/td>\n2270<\/td>\n<\/tr>\n
42\u00d7146<\/td>\n1770<\/td>\n2220<\/td>\n2220<\/td>\n2770<\/td>\n<\/tr>\n
48\u00d7152<\/td>\n2170<\/td>\n2900<\/td>\n2400<\/td>\n3550<\/td>\n<\/tr>\n
52\u00d7170<\/td>\n2450<\/td>\n3400<\/td>\n2640<\/td>\n4250<\/td>\n<\/tr>\n
56\u00d7187<\/td>\n2880<\/td>\n3960<\/td>\n3000<\/td>\n4400<\/td>\n<\/tr>\n
60\u00d7197<\/td>\n3400<\/td>\n4520<\/td>\n3500<\/td>\n4800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Grade C: standard high-strength specification \u00a0\u00b7\u00a0 Grade D: enhanced-strength specification for higher-load duty<\/p>\n<\/div>\n<\/section>\n

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Construction & Standards<\/p>\n

Product Features<\/h2>\n
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Material: 20Mn2 \/ 25MnV \/ 23MnNiMoCr54<\/h3>\n

Three alloy steel grades are available to match load requirements. All are processed through precision flash butt welding and quench-temper heat treatment to achieve the specified Grade C or Grade D mechanical properties.<\/p>\n<\/div>\n

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Compact Profile Construction<\/h3>\n

Alternate vertical links have flattened sides, reducing overall chain height versus an equivalent round link chain of the same nominal diameter. This allows the chain to fit conveyors with tighter trough clearance profiles.<\/p>\n<\/div>\n

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Standards: GB\/T 12718-2009 & MT\/T 929-2004<\/h3>\n

Manufactured and tested to GB\/T 12718-2009 and MT\/T 929-2004 industry standards, covering dimensional tolerances, mechanical properties, and acceptance testing requirements for mining compact chains.<\/p>\n<\/div>\n

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Grade C and Grade D Available<\/h3>\n

Grade C covers standard high-strength duty. Grade D provides higher minimum breaking loads for applications where loads exceed Grade C capacity. Both grades are available across the full 22\u00d786 to 60\u00d7197 mm size range.<\/p>\n<\/div>\n

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Size Range: 22\u00d786 to 60\u00d7197 mm<\/h3>\n

Ten standard diameter-pitch combinations cover a wide range of scraper conveyor and AFC equipment. Sizes follow nominal diameter and pitch combinations of 22\u00d786, 26\u00d792, 30\u00d7108, 34\u00d7126, 38\u00d7137, 42\u00d7146, 48\u00d7152, 52\u00d7170, 56\u00d7187, and 60\u00d7197 mm.<\/p>\n<\/div>\n

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Surface Treatment Options<\/h3>\n

Available with hot-dip galvanising, electro-galvanising, blackening, carburising, or epoxy powder coating. Surface treatment is selected according to the humidity, temperature, and corrosive conditions of the target application.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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\"Mining<\/p>\n

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Application Sectors<\/p>\n

Where Mining Compact Chains Are Used<\/h2>\n
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\u26cf<\/span><\/p>\n

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Armoured Face Conveyors (AFC)<\/p>\n

Traction chain for longwall scraper systems where trough height is constrained.<\/p>\n<\/div>\n<\/div>\n

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\ud83c\udfed<\/span><\/p>\n

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Stage Loaders & BSL Conveyors<\/p>\n

Transfer-point drive chains in continuous high-tonnage coal handling systems.<\/p>\n<\/div>\n<\/div>\n

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\ud83e\udea8<\/span><\/p>\n

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Road Header Machines<\/p>\n

Conveyor drive chains on roadway development equipment in underground operations.<\/p>\n<\/div>\n<\/div>\n

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\ud83d\udd29<\/span><\/p>\n

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Retrofit Applications<\/p>\n

Direct replacement for existing compact chains on conveyors where round link chains cannot be substituted due to equipment geometry.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Approvals & Certifications<\/p>\n

International Certifications<\/h2>\n

Ever-power Engineer Class Chain Co., Ltd holds certifications covering mining, marine, and general industrial chain supply. Full certificate documentation is provided on request during the enquiry process.<\/p>\n

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\u2714 Lloyd’s Register<\/div>\n
\u2714 ABS<\/div>\n
\u2714 Bureau Veritas<\/div>\n
\u2714 DNV<\/div>\n
\u2714 ISO 9001<\/div>\n
\u2714 ISO 14001<\/div>\n
\u2714 CE Mark<\/div>\n
\u2714 MA Mining Safety<\/div>\n<\/div>\n<\/div>\n
\"Ever-power<\/div>\n<\/div>\n<\/section>\n

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FAQ<\/p>\n

Frequently Asked Questions<\/h2>\n
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What is the difference between a mining compact chain and a mining round link chain?<\/h3>\n

A mining round link chain (DIN 22252) has all links with a circular cross-section. A mining compact chain has alternate vertical links with flattened sides, which reduces the overall chain height for a given nominal diameter. This allows compact chains to be used in conveyors where round link chains of the same size would not fit due to trough geometry constraints.<\/p>\n<\/div>\n

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Which steel grades are available?<\/h3>\n

Three alloy steel grades are available: 20Mn2, 25MnV, and 23MnNiMoCr54. The appropriate grade is selected based on load requirements, operating environment, and the required heat-treatment specification.<\/p>\n<\/div>\n

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What standards do these chains comply with?<\/h3>\n

All mining compact chains are manufactured and tested to GB\/T 12718-2009 and MT\/T 929-2004. These standards define dimensional tolerances, mechanical property requirements, and the acceptance testing procedures applicable to compact mining chains.<\/p>\n<\/div>\n

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What is the minimum breaking load for 42\u00d7146 Grade D?<\/h3>\n

The minimum breaking load for 42\u00d7146 Grade D is 2,770 kN, with a test load of 2,220 kN. For Grade C of the same size, the minimum breaking load is 2,220 kN with a test load of 1,770 kN.<\/p>\n<\/div>\n

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Are compact chains available with surface treatment?<\/h3>\n

Yes. Available surface treatments include hot-dip galvanising, electro-galvanising, blackening, carburising, and epoxy powder coating. The appropriate treatment is selected based on the humidity and corrosive conditions of the operating environment.<\/p>\n<\/div>\n

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Can compact chains be supplied as a direct replacement for existing equipment?<\/h3>\n

Yes, provided the nominal diameter, pitch, and grade match the original specification. Please provide the chain size designation and equipment make when enquiring to confirm compatibility before ordering.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Also from Ever-power<\/p>\n

Related Products<\/h2>\n\n\n\n\n\n
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Mining Chains<\/p>\n

Mining Round Link Chain<\/a><\/p>\n

10\u00d740 to 42\u00d7146 mm \u00b7 Grade B\/C \u00b7 DIN 22252 \u00b7 full round-link profile<\/p>\n<\/td>\n

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Lifting Chains<\/p>\n

Grade 80 Lifting Chain<\/a><\/p>\n

EN 818-2 \u00b7 6\u201348 mm \u00b7 port handling and industrial lifting<\/p>\n<\/td>\n<\/tr>\n

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Lifting Chains<\/p>\n

Grade 100 Lifting Chain<\/a><\/p>\n

EN 818-2 \/ ISO 3077 \u00b7 8\u201326 mm \u00b7 heavy industrial and harbour crane use<\/p>\n<\/td>\n

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Mining Accessories<\/p>\n

Round Link Chain Connecting Links<\/a><\/p>\n

Flat-arc and flat-saw-tooth types \u00b7 18\u00d764 to 48\u00d7152 mm<\/p>\n<\/td>\n<\/tr>\n

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Mining Accessories<\/p>\n

Central Chain Scraper Flight Bar<\/a><\/p>\n

Compatible with 22\u00d786 to 42\u00d7146 chain \u00b7 matched to trough dimensions<\/p>\n<\/td>\n

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Specialty Chains<\/p>\n

Stainless Steel Chain<\/a><\/p>\n

304 \/ 316 \/ 316L \u00b7 2\u201332 mm \u00b7 corrosion-resistant applications<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n

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Mining compact chains are part of the wider category of mining chain drive products used in coal and hard-rock material handling. Those specifying chains for coal face conveyor systems may also find useful reference in conveyor chain selection and load rating guidance<\/a>, while power transmission chain standards<\/a> are relevant for surface plant drives that interface with underground chain systems. For heavy-duty chain products used in adjacent mining infrastructure, heavy-duty chain engineering data<\/a> and industrial roller chain specifications<\/a> provide complementary technical context.<\/p>\n<\/div>\n<\/section>\n


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