TOPONE Electric Hoist Load Chain is a precision-engineered alloy steel chain designed for electric and pneumatic chain hoists. Manufactured with controlled dimensional tolerances and heat treatment, it provides reliable chain engagement, wear resistance, and fatigue performance for powered lifting applications. Available in EN 818-7 Grade T types T, DAT, and DT, with reference diameters from 4mm to 22mm, TOPONE supports custom chain sizes, pitches, lengths, and bulk orders for hoist manufacturers, equipment distributors, and industrial maintenance suppliers.
TOPONE CHAIN manufactures electric hoist load chains for powered lifting equipment, including electric chain hoists, pneumatic hoists, and industrial lifting systems. Made from high-strength quenched and tempered alloy steel, our fine-tolerance chains are designed for precise engagement with compatible hoist load wheels and reliable performance under repeated lifting cycles.
Available in Types T, DAT, and DT, the product range provides options for different hoist designs and operating requirements. TOPONE supports custom chain diameters, pitches, working lengths, approved surface finishes, and bulk manufacturing orders.
Our electric hoist load chains can be evaluated for the following equipment:
Electric Chain Hoists: For compatible powered lifting systems used in factories, workshops, and warehouses.
Pneumatic Chain Hoists: For approved air-powered lifting equipment.
Industrial Production Lines: For integrated hoisting and material-handling systems.
High-Duty-Cycle Hoists: For applications requiring suitable fatigue and wear performance.
Replacement Load Chains: For maintenance or replacement where the chain has been specifically approved for the hoist model.
For related equipment, explore TOPONE's Electric Chain Hoist (Single Chain) and Electric Chain Hoist (Multi-Chain).
As a lifting chain manufacturer and supplier, TOPONE operates nine automated chain production lines supporting industrial chain manufacturing.
We offer:
Precision chain manufacturing with controlled link dimensions
T, DAT, and DT hoist chain options
Custom chain diameters, pitches, and working lengths
Heat-treated alloy steel construction
Production inspection and technical documentation
Bulk supply for equipment manufacturers and distributors
Technical review of hoist chain specifications and replacement requirements
Our products support industrial lifting applications in manufacturing, machinery maintenance, construction, warehousing, and equipment assembly.
For additional equipment applications, visit our Chain Hoist Solution page.
Looking for a reliable electric hoist load chain manufacturer?
Contact TOPONE with your hoist model, chain diameter, pitch, required length, chain type, and order quantity. Our team can review the requested specifications and discuss suitable manufacturing and supply options.
The following technical parameters are based on the manufacturer's specifications for the EN818-7 Electric Hoist Load Chain. These values define the physical and mechanical properties for each available chain size.
Short link chain for ifting purposes — Fine tolerance hoist chain, rade T(Types T,DAT and DT)
| Diameter (mm) | Pitch (mm) | Inside Width | Outside Width | Weld Diameter max. (ds) | Hardness (HV) | Working Load Limit (WLL/t) | Proof Load (MPL/kN) | Breaking Load (MBL/kN) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | Tolerance | p | Tolerance | b1 min. | b2 max. | T | DAT | DT | T | DAT | DT | |||
| 4 | ±0.2 | 12 | ±0.25 | 4.8 | 13.6 | 4.3 | 320 | 500 | 550 | 0.5 | 0.4 | 0.25 | 12.6 | 20.1 |
| 5 | ±0.2 | 15 | ±0.3 | 6.1 | 17 | 5.4 | 320 | 500 | 550 | 0.8 | 0.63 | 0.4 | 19.6 | 31.4 |
| 6 | ±0.2 | 18 | ±0.35 | 7.2 | 20.4 | 6.5 | 320 | 500 | 550 | 1.1 | 0.9 | 0.56 | 28.3 | 45.2 |
| 6.3 | ±0.3 | 19 | ±0.35 | 9 | 21.6 | 6.8 | 320 | 500 | 550 | 1.35 | 1.08 | 0.67 | 21.6 | 54 |
| 7 | ±0.3 | 21 | ±0.4 | 8.4 | 23.8 | 7.6 | 320 | 500 | 550 | 1.5 | 1.2 | 0.75 | 38.5 | 61.6 |
| 7.1 | ±0.3 | 20.2 | ±0.4 | 9 | 23.2 | 7.7 | 320 | 500 | 550 | 1.6 | 1.28 | 0.8 | 25.6 | 64 |
| 8 | ±0.3 | 24 | ±0.5 | 9.6 | 27.2 | 8.6 | 320 | 500 | 550 | 2 | 1.6 | 1 | 50.3 | 80.4 |
| 9 | ±0.4 | 27 | ±0.5 | 10.8 | 30.6 | 9.7 | 320 | 500 | 550 | 2.5 | 2 | 1.25 | 63.6 | 102 |
| 10 | ±0.4 | 30 | ±0.6 | 12 | 34 | 10.8 | 320 | 500 | 550 | 3.2 | 2.5 | 1.6 | 78.5 | 126 |
| 10 | ±0.4 | 30.2 | ±0.6 | 12 | 32 | 10.8 | 320 | 500 | 550 | 3.2 | 2.56 | 16 | 51.2 | 128 |
| 11 | ±0.4 | 33 | ±0.6 | 13.2 | 37.4 | 11.9 | 320 | 500 | 550 | 3.5 | 3 | 1.9 | 95 | 152 |
| 11.2 | ±0.5 | 34 | ±0.6 | 15 | 37.4 | 12.1 | 320 | 500 | 550 | 4 | 3.5 | 2 | 64 | 160 |
| 12 | ±0.5 | 36 | ±0.7 | 14.4 | 40.8 | 13 | 320 | 500 | 550 | 4.5 | 3.6 | 2.2 | 113 | 181 |
| 13 | ±0.5 | 36 | ±0.8 | 16 | 42 | 14 | 320 | 500 | 550 | 5.3 | 4.24 | 2.65 | 84.8 | 212 |
| 13 | ±0.5 | 39 | ±0.8 | 15.6 | 44.2 | 14 | 320 | 500 | 550 | 5.3 | 4.2 | 2.6 | 133 | 212 |
| 14 | ±0.6 | 42 | ±0.8 | 16.8 | 47.6 | 15.1 | 320 | 500 | 550 | 6 | 5 | 3 | 154 | 246 |
| 16 | ±0.6 | 45 | ±0.9 | 19 | 57 | 17.3 | 320 | 500 | 550 | 8.05 | 6.44 | 4.02 | 128.8 | 322 |
| 16 | ±0.6 | 48 | ±0.9 | 19.2 | 54.4 | 17.3 | 320 | 500 | 550 | 8 | 6.3 | 4 | 201 | 322 |
| 18 | ±0.9 | 54 | ±1.0 | 21.6 | 61.2 | 19.4 | 320 | 500 | 550 | 10 | 8 | 5 | 254 | 407 |
| 20 | ±1.0 | 60 | ±1.2 | 24 | 68 | 21.6 | 320 | 500 | 550 | 12.5 | 10 | 6.3 | 314 | 503 |
| 22 | ±1.1 | 66 | ±1.3 | 26.4 | 74.8 | 23.8 | 320 | 500 | 550 | 15 | 12.5 | 7.5 | 380 | 608 |
Grade 80 Electric Hoist Load Chain Specifications
Nominal Size (d): Not less than 4 mm or greater than 22 mm. Custom sizes are available upon confirmation with TOPONE CHAIN.
Pitch (p): Standard chain pitch is typically based on 3 times the nominal size (3d). Special cases may vary between 2.6d to 3.2p, but must be confirmed with TOPONE CHAIN before manufacturing.
Weld Diameter (ds): The maximum diameter at the weld in any direction shall not exceed 8% of the nominal size. The thickness of steel at the weld shall never be less than the actual diameter of the unaffected steel near the weld.
Heat-Affected Length: The length affected by welding shall not extend more than 0.6 times the nominal diameter (0.6d) on either side of the link center.
Material Quality: Steel must be produced using electric furnace or oxygen-blown process. It must be fully killed steel, resistant to strain-age embrittlement, with an austenitic grain size of 5 or finer.
Chemical Composition of Material:
• Steel shall contain sufficient alloying elements (nickel, chromium, molybdenum) to ensure strength and low-temperature toughness after heat treatment.
• Minimum nickel content by mass: Type T at least 0.40%, Type DAT at least 0.7%, Type DT at least 0.9%.
• To prevent strain-age embrittlement, steel must contain at least 0.025% aluminum.
• Maximum sulfur and phosphorus content in cast analysis shall not exceed 0.020%.
Heat Treatment: All lifting chains must be quenched from temperatures above the AC3 point and/or surface hardened, followed by tempering, before being subjected to the "Manufacturing Proof Force".
Breaking Force and Elongation: The minimum total elongation at fracture after tensile testing shall be: Type T and Type DAT minimum 10%, Type DT minimum 5%.
Bending Deflection: Type DAT and Type DT chain samples must be able to withstand a force equivalent to 2.5 times the Working Load Limit (WLL) without fracture.
Surface Hardness: Type DT has the highest surface hardness requirement (minimum 550 HV 10 for 7 mm to 11 mm chains), followed by Type DAT (minimum 500 HV 10), and Type T (360 HV 10).
Fatigue Resistance: Type DAT and Type DT chains with precision tolerances must be able to withstand at least 200,000 cycles of specified stress range testing without failure.
Adherence to recognized international standards is mandatory to ensure the safety, high quality, and interoperability of lifting equipment. Our electric hoist load chains are manufactured in compliance with the following key standards:
This is the first part of the EN 818 series of standards, which specifies the general conditions of acceptance for lifting chains, including marking, certification, and test methods.
This is a German standard that specifies the technical conditions for steel used in the manufacture of lifting chains. It details the requirements for the steel's chemical composition, mechanical properties, purity, etc., and is key to ensuring the quality of the chain's raw material.
This is the primary European standard that specifies the manufacturing and testing of high-precision hoist chains. Its full title is "Short link chain for lifting purposes — Safety — Part 7: Fine tolerance hoist chain, Grade T (Types T, DAT and DT)".
What this standard guarantees: Compliance with EN 818-7 ensures that the chain meets strict requirements in material properties, chemical composition, dimensional accuracy (especially pitch), heat treatment, and mechanical properties (such as tensile strength and elongation). It also mandates specific testing procedures, including a proof load test on every single link.
100 m / 1 TON
Sampling lots (Lot) are set at 100 m as a unit length. Five links are sampled for testing including breaking force, elongation, bending test, surface hardness test, hardened layer depth measurement (DAT/DT types only), and fatigue testing. All lifting chains (100%) must individually undergo static tensile testing and withstand the specified Manufacturing Proof Force. This test cannot be retested; non-conforming chains are immediately discarded.
In accordance with EN 818-1 regulations, contact TOPONE CHAIN to obtain a free copy for verification of product suitability.
Marking shall comply with EN 818-1 regulations. The grade marking of lifting chains shall be marked as T, DAT, or DT according to their type.
TOPONE CHAIN will specify in the instruction manual the restrictions on subsequent heat treatment, galvanizing, electroplating, or coating of the chain. Without TOPONE CHAIN approval, lifting chains shall not be galvanized or undergo any electroplating process, nor shall they be immersed in acidic solutions or exposed to acidic fumes.
Temperature Limits for Working Environment
• Type T: Minimum -40°C
• Type DAT: Minimum -20°C
• Type DT: Minimum -10°C
• Maximum Temperature: All Type T, DAT, and DT can be used up to +200°C. If chain temperature exceeds 200°C, it must be retired immediately.
Chains shall not be used to manufacture slings, nor shall they be used as basket hitches or choke hitches in hoists.
Manufacturing Standards:
TOPONE electric hoist load chains are produced to approved manufacturing specifications for fine-tolerance hoist chains.
EN 818-7:2002+A1:2008 specifies relevant requirements for Grade T fine-tolerance hoist chains, including Types T, DAT, and DT. EN 818-1 provides applicable general acceptance requirements for short-link lifting chains.
Material selection, chain dimensions, welding, heat treatment, and finishing must meet the requirements of the confirmed product type and specification. Claims of compliance must be supported by the relevant manufacturing and inspection records.
Testing Standards:
Product verification is performed according to the applicable chain specification and approved quality control procedures.
Relevant checks include:
Chain diameter and pitch measurement
Link width and dimensional tolerance inspection
Weld quality verification
Material and heat treatment inspection
Manufacturing proof-force testing
Breaking-force testing
Hardness and fatigue testing where required
Product identification and traceability checks
Test reports and certificates should correspond to the actual production batch and agreed order requirements.
Application Standards:
The electric hoist load chain must be selected according to the approved hoist design, chain type, dimensions, rated capacity, and operating environment.
Only replacement chains authorized for the specific hoist model should be installed.
Hoist load chains must not be substituted with general-purpose lifting chains, used to manufacture independent chain slings, or altered through unauthorized welding, shortening, heat treatment, or surface processing.
The complete hoist must remain within its marked rated capacity, regardless of the nominal strength of the replacement chain.
Maintenance Standards:
Inspect the load chain and relevant hoist components according to the equipment manufacturer's instructions and applicable inspection requirements.
Check for excessive wear, elongation, cracks, corrosion, deformation, damaged weld areas, and improper chain engagement.
Inspect the load wheel, chain guides, and related components when abnormal chain movement or wear occurs.
Use approved lubrication and maintenance procedures. Remove damaged or incompatible load chains from service and arrange assessment or replacement by qualified personnel.
Any replacement must be verified for compatibility and correct operation before the hoist returns to service.
