Product Overview
Black annealed wire starts as Q195 rod, is cold drawn to size and then annealed in a sealed furnace to take out the drawing work hardening. Hardness falls to HRB 60-75, so it feels soft, ties without snapping and springs back very little. The surface is the black oxide film left by annealing with a light rust preventive oil – there is no zinc coating, which keeps the cost below galvanized wire and suits single use or indoor applications.
Specifications
| Parameter | Value |
|---|---|
| Wire diameter | 0.7 – 4.0 mm (BWG 8 – 24) |
| Common sizes | 1.2 mm / 1.6 mm / 2.0 mm |
| Tensile strength | 300 – 450 MPa |
| Elongation | min 15% |
| Hardness | HRB 60 – 75 (soft temper) |
| Diameter tolerance | +/- 0.03 mm |
| Coil weight | 5 – 50 kg |
| Surface | Black oxide film / uncoated |
| Bend testing | 20 knot tests per batch without breaking |
Applications
Used for baling corrugated cartons and waste paper, tying hay and straw, cotton baling, tying rebar on site, hanging small hardware and garden tying. Agricultural buyers in Africa and South America take 1.6-2.0 mm for fodder baling, while packaging plants in Southeast Asia use 1.2 mm for carton baling.
Packing / Delivery / Payment
Inner moisture proof paper with an outer woven bag, supplied in 5-50 kg coils, plain or with a hand loop. A 20GP holds about 22-25 tons. Stock ships in 5-10 days and drawing orders in 20 days. Payment by L/C at sight or T/T with 30% deposit. Mill certificate, diameter and tensile test reports, packing list and Certificate of Origin are provided.