You might think chain slings are fragile “weak links,” but they’re actually industrial workhorses. This guide reveals their hidden strength: how they lift heavy loads, follow strict safety rules, and dominate tasks in factories, construction, and ports. By the end, you’ll see why chain slings are more than “just chains.”

1. Material & Strength: Why Chain Slings Outperform

Chain slings get their power from Grade 80/100 alloy steel—not just any metal.

Chain Grade Tensile Strength (MPa) Typical WLL (Ton)

Grade 80 slings can raise 3–10 tons, and Grade 100 doubles capacity to 5–15 tons. Slenderness of form and steel tensile strength enable them to fit into confined spaces while raising bulky machinery, steel beams, or cargo—betraying size is not everything.

2. Safety Rules: 4:1 Factor & Testing

Chain slings use the 4:1 safety factor (WLL = break strength ÷ 4). Chain slings are strength tested by pulling to failure:

A 12-ton break strength Grade 80 sling has a WLL of 3 tons (12 ÷ 4).

A 20-ton break strength Grade 100 sling has a WLL of 5 tons (20 ÷ 4).

But angles matter! At 60°, WLL decreases by 30% (3 tons → 2.1 tons). Lift always vertically to ensure maximum capacity.

3. Optimum Applications & When Not to Employ

Chain slings are best suited in:

Factories: Lifting engines, generators, or machinery.

Construction: Hoisting steel beams or concrete panels.

Ports: Hoisting shipping containers or cargo.

Not employ them in:

Acidic Environments: Slings rust if not coated; employ galvanized types.

Sharp Edges: Edges slice chains in the absence of protective sleeves.

Conclusion

Chain slings are barely "weak links" anymore—Grade 80/100 steel and 4:1 safety practices have turned them into workhorses for industry use in factories, construction projects, and ports. For the proper chain sling on your project, contact our team today.