A chain sling only shines when its grade matches the site threat, the crane headroom, and the load map. Grade decides weight, durability, and inspection tempo, so smart buyers lock grade first, then pick leg count and hook style. This guide stacks four popular grades side-by-side, shows how work-load limits and corrosion life shift, and walks through a quick decision tree. Use the tables, check the images, and you will pick the sling that lifts more, weighs less, and lasts longer on your floor. 

1 Grade Snapshot—Strength Starts Here

Take-away: G80 beats G63 on weight and durability; G100 frees headroom while pushing capacity; stainless wins whenever salt or acid lurks.

2 Diameter vs Working Load—Real Topone Tables

G100 hits the same load with one size down, shaving sling mass 15–20 %. Stainless matches G80 loads but never rusts, so you skip repaint cycles.

3 Hook & Hardware Compatibility

Always match hook grade to chain grade. A G100 link can shear a G80 hook on the first shock load.

4 Finish Choices—Pay Only for the Threat

Paint looks cheap today; zinc lasts four seasons; stainless shrugs acid forever.

5 Three-Step Grade Decision Tree

Check environment first

Salt/acid? → Stainless G80

Wet weather? → G80 zinc or G100 zinc

Look at crane headroom

Tight headroom? → G100

Plenty of height? → G80

Compare budget vs service hours

Short-term project? → G80 paint

Long-term line work? → G100 or Stainless

Run the tree once and the grade question answers itself.

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6 Angle Factors Multiply Fast—Plan Leg Count

*Keep legs ≥45°; below that, use 1.41 or 2.0 factor and upsize diameter.

7 Cost per Tonne Lifted—Run Numbers, Not Rumours

You buy kilograms today, but you pay for tonnes lifted over the sling’s life.

8 Inspection & Care Checklist

Gauge mid-link diameter monthly—retire at 10 % wear.

Measure five-link pitch—scrap at 3 % stretch.

Oil weld crotches after wash; stop fretting.

Hang slings on racks, avoid pooling water.

Replace hooks when tip gap grows 5 % or latch drags.

Follow these moves and G80 slings often pass four years; G100 three; stainless over five in harsh plants.

Conclusion

Use the grade table, diameter chart, and decision tree, then buy the lifting chain sling that carries more, lasts longer, and suits your site without waste—check full Topone stock at lifting-chain.com. For more information, please click here to contact me.