Soft Annealed Galvanized Binding Wire Coil 1.6mm BWG16 25kg Coil Tied By Hand

Binding wire is judged by a single practical test: can a worker tie a rebar joint with a hand twister, twice, without the wire kinking back on itself or snapping at the twist? That test is about annealing, not about zinc. This soft annealed galvanized binding wire coil is drawn to 1.6 mm BWG16 and then annealed to 300 - 380 MPa with at least 20% elongation, which is soft enough to form a tight, flat twist by hand and still strong enough that the tie does not stretch when the cage is lifted. Wire that has been drawn hard to save cost will pass a tensile certificate and still fail on site, so we test for the property that matters.

The galvanized finish at 25 - 40 g/m2 covers two purposes on a construction site: it stops white rust forming on coils stored outdoors for weeks, and it keeps the tie from staining exposed concrete surfaces. It is a working coating, not a long life corrosion barrier, and we describe it that way.

• Hand tie softness: 300 - 380 MPa with 20%+ elongation, so a twist forms cleanly and stays flat against the rebar.
• No kink memory: full anneal removes the drawing strain so the wire does not spring back into the previous coil curvature.
• Consistent 1.6 mm gauge: +/- 0.03 mm, so twist tools grip the same way on every coil and operators do not need to change technique.
• Light zinc for site storage: 25 - 40 g/m2 keeps coils usable through normal outdoor storage without white rust build up.
• Practical 25 kg coil: one person can carry and pay off the coil all day, which matters more on site than a lower price per ton in 500 kg coils.
• Clean cut ends: sheared and deburred so the wire does not snag gloves or tangle when pulled from the coil.

Rebar tying on slabs, columns and precast beds is the main volume use. The same coil serves bundling of steel sections, horticulural vine and branch tying, floral and craft work, temporary fence lacing, and carton or bale closing in warehouses. On precast yards the wire is often pre-cut into fixed lengths, and in that case we can quote cut and straightened lengths instead of coils to reduce site waste. For marine or chemically aggressive sites, specify the hot dipped 60 g/m2 version rather than this light zinc coating; the price difference is small and the service life difference is not.

Annealing is verified by tensile and elongation tests on the first, middle and last coil of every lot, and by a simple manual twist test performed by the QC operator on each pallet. Diameter is checked continuously during drawing and spot checked before packing. Coating mass is measured by stripping on samples from each production hour. Documents include mill test certificate, packing list with net and gross weight per pallet, and certificate of origin. If you need a specific coil weight such as 20 kg or 30 kg for a tender, we can match it without changing the wire itself.

Each coil is packed in a poly bag with a printed label showing diameter, weight and lot number, then stacked on export pallets of 1 ton and stretch wrapped. Pallet footprints are standardised at 1100 x 1100 mm for container efficiency. Lead time is 12 - 15 days after deposit for standard 25 kg coils. A 20 foot container carries about 25 tons net. Payment by T/T with 30% deposit and balance against the bill of lading copy, or L/C at sight for larger orders.