Mining Round Link Chain – DIN 22252 | Grade B & C | 10×40 to 42×146 mm

Mining round link chains manufactured by Ever-power Engineer Class Chain Co., Ltd in 23MnNiMoCr54 and 25MnV alloy steel. Available in Grade B and Grade C, covering diameter-pitch combinations from 10×40 mm to 42×146 mm. Manufactured to DIN 22252. Test loads and minimum breaking loads verified per specification; maximum extension at test load 1.4% (Grade B) / 1.6% (Grade C), minimum elongation at fracture 12%. Surface treatment options include hot-dip galvanising, electro-galvanising, blackening, carburising, and powder coating. Certified to ISO 9001, ISO 14001, and MA Mining Safety standard. Suitable for scraper conveyors, armoured face conveyors, underground hoisting systems, and open-cut ore transport equipment.

Category: Mining Chains

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Beschreibung

Ever-power Engineer Class Chain Co., Ltd

Mining Round Link Chain

23MnNiMoCr54 Alloy Steel · Grade B / C · DIN 22252

Core traction component for scraper conveyors and longwall AFC equipment. Diameter range 10×40 to 42×146 mm. Tensile strength ≥ 1,600 MPa (Grade C). 3D flaw-detected and dynamic load-tested every batch.

View Specifications

Mining round link chain 23MnNiMoCr54 alloy steel Grade C DIN 22252

Certified by | Lloyd's Register · ABS · Bureau Veritas · DNV · ISO 9001 · ISO 14001 · MA Mining Safety Mark

Product Overview

Built for Underground Mining Conditions

Mining round link chains are the core traction component of mechanised coal-face equipment — armoured face conveyors (AFC), stage loaders, and scraper conveyors. Every link is precision-braided and quench-tempered from 23MnNiMoCr54 oder 25MnV alloy steel, achieving Grade C tensile strength of ≥ 1,600 MPa.

Ever-power Engineer Class Chain Co., Ltd produces the full size range from 10×40 mm to 42×146 mm, covering underground hoisting, ore-transfer conveyors, and open-cut mining transport. Mean time between failures exceeds 8,000 operating hours under one-million-tonne daily coal output.

All products are manufactured and tested to DIN 22252. Each batch undergoes 18-stage quality control including three-dimensional magnetic-particle flaw detection and dynamic load verification before dispatch.

Ever-power mining chain precision braiding and heat treatment process

Technical Data

Dimensional & Load Specifications

Reference standard: DIN 22252 | Loads in kN · Dimensions in mm · Weight in kg/m

Spec (mm)	Diameter (mm)	Pitch (mm)	Min. Inner W. (mm)	Max. Outer W. (mm)	Weight (kg/m)	Test Load (kN)	Min. Breaking (kN)	Grad
10×40	10 ± 0.4	40 ± 0.5	12	34	1.9	85	110	B
10×40	10 ± 0.4	40 ± 0.5	12	34	1.9	100	130	C
14×50	14 ± 0.4	50 ± 0.5	17	48	4	150	190	B
14×50	14 ± 0.4	50 ± 0.5	17	48	4	200	250	C
18×64	18 ± 0.5	64 ± 0.6	21	60	6.6	260	320	B
18×64	18 ± 0.5	64 ± 0.6	21	60	6.6	330	410	C
22×86	22 ± 0.7	86 ± 0.9	26	74	9.5	380	480	B
22×86	22 ± 0.7	86 ± 0.9	26	74	9.5	490	610	C
26×92	26 ± 0.8	92 ± 0.9	30	86	13.7	540	670	B
26×92	26 ± 0.8	92 ± 0.9	30	86	13.7	680	850	C
30×108	30 ± 0.9	108 ± 1.0	34	98	18	710	890	B
30×108	30 ± 0.9	108 ± 1.0	34	98	18	900	1130	C
34×126	34 ± 1.0	126 ± 1.2	38	109	22.7	900	1140	B
34×126	34 ± 1.0	126 ± 1.2	38	109	22.7	1160	1450	C
38×137	38 ± 1.1	137 ± 1.4	42	123	29	1450	1810	C
42×146	42 ± 1.3	146 ± 1.5	46	135	35.3	1770	2220	C

Max. extension at test load: 1.4% (Grade B) / 1.6% (Grade C) · Min. elongation at fracture: 12%

Specifications & Construction

Produktmerkmale

Material: 23MnNiMoCr54 Alloy Steel

Links are precision-braided from 23MnNiMoCr54 or 25MnV alloy steel and processed through water quench and temper to achieve the specified Grade B or Grade C tensile properties.

Tensile Strength ≥ 1,600 MPa (Grade C)

Grade C chains meet a minimum breaking load commensurate with ≥ 1,600 MPa tensile strength. Grade B chains are available for applications with lower load requirements.

Standard: DIN 22252

All chains are manufactured and tested to DIN 22252 international standard, covering dimensional tolerances, mechanical properties, and acceptance testing requirements.

Quality Control: 18-Stage Process

Every batch undergoes three-dimensional magnetic-particle flaw detection and dynamic load verification as part of an 18-stage QC protocol. Certificates of conformance are issued per shipment.

Size Range: 10×40 to 42×146 mm

Nine standard diameter-pitch combinations are available. Custom intermediate sizes can be produced on request to match specific conveyor or haulage equipment requirements.

Surface Treatment Options

Available with hot-dip galvanising, electro-galvanising, blackening, carburising, or epoxy powder coating, selected according to the corrosive and humidity conditions of the operating environment.

Mining round link chain in use on underground scraper conveyor armoured face conveyor

Application Sectors

Where Mining Round Link Chains Are Used

⛏

Armoured Face Conveyors (AFC)

Primary traction chain for longwall scraper systems at coal faces.

🏭

Stage Loaders & BSL Conveyors

Transfer-point drive chains for continuous high-tonnage throughput.

🪨

Underground Hoisting Systems

Shaft and incline haulage where cyclic load and fatigue resistance matter.

🚛

Open-Cut Ore Transport

Surface mining conveyors operating in dusty, abrasive, or wet conditions.

Approvals & Certifications

International Certifications

Ever-power Engineer Class Chain Co., Ltd holds certifications covering mining, marine, and general industrial chain supply. Full certificate documentation is available on request during the enquiry process.

✔ Lloyd's Register

✔ ABS

✔ Bureau Veritas

✔ DNV

✔ ISO 9001

✔ ISO 14001

✔ CE Mark

✔ MA Mining Safety

Project References

Supply References

Arctic Mining · Russia

Norilsk Nickel Mine — Deep Shaft Hoisting at −50 °C

Ever-power supplied mining chains rated to −50 °C for a 1,200 m deep-shaft hoisting system at a nickel mine within the Arctic Circle. The specification included a custom alloy grade and sub-zero Charpy impact testing prior to shipment.

Coal Mining · Siberia

Kuzbass Coal Basin — Corrosion-Resistant Conveyor Chain

Corrosion-resistant conveyor chains supplied to a coal basin operation in Siberia. Chains were specified for high-humidity underground conditions and exposure to acidic groundwater over multi-year service intervals.

Coal Mining · Germany

German Hard Coal Operation — DIN 22252 Supply

Ever-power mining round link chains were qualified as a replacement for domestically sourced product at a German hard coal mining enterprise. Chains met DIN 22252 requirements and matched the required fatigue life at a lower procurement cost.

Häufig gestellte Fragen

What steel grade is used?

The primary alloy is 23MnNiMoCr54. For applications requiring higher toughness at elevated pitch, 25MnV is also available. Both are water-quench-tempered to achieve the specified Grade B or Grade C tensile properties.

What is the minimum breaking load for 34×126 Grade C?

The minimum breaking load for 34×126-C is 1,450 kN, with a test load of 1,160 kN and maximum extension of 1.6% at test load. Minimum elongation at fracture is 12%.

Are these chains compliant with DIN 22252?

Yes. All mining round link chains are manufactured and tested to DIN 22252. Certificates of conformance are available on request.

What surface treatment options are available?

Standard options include hot-dip galvanising, electro-galvanising, blackening, carburising, and epoxy powder coating. The appropriate treatment is selected based on the corrosive and humidity conditions of the operating environment.

Is flaw detection carried out on every batch?

Yes. Three-dimensional magnetic-particle flaw detection is carried out on every production batch as part of the standard 18-stage QC process, along with dynamic load verification before dispatch.

Can you supply chains rated for temperatures below −40 °C?

Yes. Ever-power has supplied chains rated to −50 °C for deep-shaft Arctic mining applications. Sub-zero Charpy impact test reports are available on request.

What certifications does Ever-power hold?

Ever-power Engineer Class Chain Co., Ltd holds ISO 9001, ISO 14001, MA Mining Safety, Lloyd's Register, ABS, Bureau Veritas, DNV, and CE approvals. Certificate copies are provided on request during the enquiry process.

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