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Black annealed wire — rosette coils with no splices, so your line can keep running without surprise stops. We give each coil two step oils and a three-layer wrap to stop flash rust, and the wire’s annealed soft (tensile ≤ 380 MPa).
Black annealed wire may look simple, but for hop-wire makers it’s much more than just “soft black wire” — it’s what keeps production running.
If your line depends on steady wire feed, you know that coil shape and wire quality effect how well your machines perform and how much product you can push out.
We supply black annealed wire as the raw material for hop-wire manufacture. Each coil is a rosette-wound, single continuous strand — no splices, no joins — and comes in 300 / 400 / 500 kg sizes with a standard 400 mm inner diameter. The wire is annealed so it’s soft enough for cutting, and we control it so tensile strength stays at or under 380 MPa. To keep the surface clean during storage and sea shipping, we oil the wire twice: once while the rosette is being wound, and once more as a light spray before packing. Then each coil is wrapped in three protective layers (anti-rust film → woven bag → shrink wrap). That mix — continuous coil, controlled metal properties, process oiling and export-grade packing — gives you coils that feed well and need much less prep before use.
Hop wire heads and automated pay-off systems are designed to run continuously; a single splice or break forces an immediate stop, manual rethreading and line recovery time. We standardize on a 400 mm inner diameter and tight winding geometry because pay-off heads perform best with consistent coil profiles. The rosette form provides a flat, stable package that seats correctly on horizontal or vertical pay-off spindles, minimizing lateral movement that causes skew and bird-nesting. Precision winding also reduces variable tension peaks during payoff, so your tension control and dancer systems maintain steady feed without constant operator adjustment.
Surface oxidation (flash rust) is a common and costly issue when coils cross long shipping routes or sit in yard storage. The key difference in our process is timing and coverage. We apply the first oil during the rosette rewinding stage, so the entire length of wire is wetted before the coil geometry is finalized. That prevents the formation of dry pockets that lead to localized corrosion. A second, calibrated spray is applied immediately before packing to lock the protective film in place and improve resistance to condensation during container transit. Because the oil is applied at process-critical moments—during rewinding and before packing—your incoming coils arrive with significantly less surface oxidation and require less cleaning.
For hop-wire applications, softness is not a vague quality—it is a measurable requirement. We set annealing parameters and input metallurgy so that the wire is ductile enough for tight twisting and forming, while tensile strength is capped at ≤ 380 MPa to avoid brittle failure. That cap provides a repeatable combination: easy bending, limited springback, and sufficient strength during tensioned twisting operations. In practice, this means dies and rollers experience less abrasive impact, twisted products hold shape consistently, and breakage rates during forming fall sharply compared with harder, higher-tensile variants.
Every coil receives triple protective layers: a thick anti-rust plastic film directly on the metal, a woven polypropylene outer bag for mechanical protection, and a shrink wrap seal for weather resistance. Coils are strapped.
We provide load photos on request so your receiving team knows exactly what to expect on arrival.
When you run our rosette coils you should see:
These are measurable improvements: less downtime, less scrap and lower labor hours per ton processed.
We maintain production capacity for both sampling and scaled supply. Typical shipment rhythm allows dispatch of up to five containers every 20 days—flexible to meet trial runs or scheduled production.
For initial engagement we can provide sample, tensile test records and packing photos, so your engineering team can validate feedability and surface condition before larger orders.
Hop-wire manufactures depends on predictable inputs. A coil that is single continuous, properly oil-protected, and soft with controlled tensile converts a common failure mode into a reliable process input.
If your priority is keeping heads running with minimal intervention, our black annealed rosette coils are engineered to be the operational difference.
We will contact you within 1 working day.
