Lifting Chain for Chain Slings is a critical load-bearing component used in industrial lifting systems, where safety, dimensional accuracy, and mechanical consistency directly affect the performance of the complete sling assembly. Unlike general-purpose chains, lifting chains are specifically engineered to withstand repeated loading, dynamic forces, and demanding working environments.
We manufacture and supply Grade 80 (800 N/mm²) and Grade 100 (1000 N/mm²) alloy steel lifting chains specifically calibrated for overhead lifting and chain sling fabrication. Every meter undergoes continuous flash butt welding, controlled induction heat treatment, and mandatory proof loading to ensure compliance with global rigging standards (EN 818-2, NACM, and ASME B30.9).
Technical Specifications
|
Nominal Size (mm) |
Pitch / Inside Length (mm) |
Outside Width Max (mm) |
Grade 80 WLL (Tons)* |
Grade 100 WLL (Tons)* |
Proof Load (kN) |
Min. Breaking Force (kN) |
Approx. Weight (kg/m) |
|
6 mm |
18.0 |
22.2 |
1.12 |
1.40 |
28.3 |
45.2 |
0.80 |
|
8 mm |
24.0 |
29.6 |
2.00 |
2.50 |
50.3 |
80.4 |
1.40 |
|
10 mm |
30.0 |
37.0 |
3.15 |
4.00 |
78.5 |
126.0 |
2.20 |
|
13 mm |
39.0 |
48.1 |
5.30 |
6.70 |
133.0 |
212.0 |
3.80 |
|
16 mm |
48.0 |
59.2 |
8.00 |
10.00 |
201.0 |
322.0 |
5.70 |
|
20 mm |
60.0 |
74.0 |
12.50 |
16.00 |
314.0 |
503.0 |
9.00 |
|
22 mm |
66.0 |
81.4 |
15.00 |
19.00 |
380.0 |
608.0 |
11.00 |
|
32 mm |
96.0 |
118.0 |
31.50 |
40.00 |
804.0 |
1280.0 |
23.00 |
*Working Load Limit (WLL) based on a 4:1 Safety Factor for standard vertical lifting configuration.
Grade 80 vs. Grade 100
|
Performance Factor |
Grade 80 Alloy Chain |
Grade 100 Alloy Chain |
|
Tensile Stress |
800 N/mm² |
1000 N/mm² |
|
Load Performance |
Standard industrial workhorse for general lifting applications |
25% higher WLL compared with same-size Grade 80 chain |
|
Strength Advantage |
Reliable strength with high ductility and fatigue life |
Higher strength-to-weight ratio for demanding lifting requirements |
|
Weight Efficiency |
Cost-effective solution for routine overhead lifting |
Reduces overall sling weight by up to 30% |
|
Main Applications |
General overhead lifting, construction, industrial handling |
Compact rigging systems, heavy lifting, ergonomic sling designs |
|
Key Benefit |
Balanced performance and cost efficiency |
Higher lifting capacity with reduced chain size and weight |
Quality Control
Raw Material Verification
We source fine-grained alloy steel containing precise ratios of Manganese (Mn), Nickel (Ni), Chromium (Cr), and Molybdenum (Mo). Each wire rod coil is chemically analyzed via spectrometer before cold-drawing.
Automatic Flash Butt Welding & Calibration
Links are formed and flash-welded on automated production lines. Weld seams are deburred and sensor-inspected. Post-weld calibration guarantees link pitch tolerances within strict limits, preventing jam-ups in automatic sling assembling machines.
Continuous Quenching & Tempering
Chains pass through computer-controlled medium-frequency induction furnaces. This heat-treatment profile creates a tempered martensite microstructure, providing the ultimate balance between high tensile strength and minimum 20% total elongation before fracture.
100% Proof Load & Quality Testing
Proof Load Test: Every continuous length of chain is subjected to a manufacturing proof force equal to 2.5 times the WLL.
Bend & Elongation Test: Samples from each heat-treatment batch are bent to verify weld ductility and strength.
Embossing & Marking: Raised manufacturer identification and grade markings (e.g., G80 or G100) are stamped every 20 links for field inspection compliance.
Surface Finishes & Packaging Specifications
To match specific operational environments, we offer multiple corrosion-protection options:
Black Oxide (Oiled): Standard finish for indoor industrial environments and quick-turnaround sling assembly.
Electrophoretic / Painted (Yellow/Blue): High-visibility color coding for rapid grade identification in field work.
Hot-Dip / Electro-Galvanized: Enhanced oxidation resistance for marine, outdoor construction, and humid environments.
Packaging Options for Wholesale Procurement:
Steel Drums: 100kg to 500kg heavy-duty steel drums on ocean-freight wooden pallets.
Wooden Boxes: Cut-to-length segments packaged for direct retail distribution or sling shop inventory.
FAQ
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