coil iron wire wire nail making machine raw material hard black wire for manufacture nails

Keywords: black annealed wire,black wire,annealed wire,black annealed wire 1.5mm.

 Black annealed wire, also called black wire, comes in the form of coil wire or cut wire.It’s made of  low-carbon steel wire. Used for tie wire or binding wire in construction.

C≤0.07; S≤0.023; Si≤0.09; Mn≤0.32; P≤0.025.Because This type of wire rod has less Impurities, Q195 is fit for drawing.

The diameter is 6.5mm. Generally, Daily output of Wanlida is 120 tons.(electro and hot-dipped are separately 60 tons)

2. Drawing

Galvanized wire's first stage is drawing.

there are two kinds of drawing machine: powder drawing and water drawing. powder drawing is fit for junior drawing(6.5mm~4.0mm).

One powder drawing machine has 4 tanks and 4 molds. One tank is matched with a mold. Each of them are offered energy by a electromotor.

0.9mm(max)can be "eat" when the wire cross a mold. There are no loss of weight during drawing.

3. Annealing

Galvanized wire's second stage is anneal.

Anneal is to low the tensile strength of wire. The stove is solid and built with red bricks. The architecture of anneal stove is cuboid.

 Different thickness of wire require different temperature. Range is from 700°C to 900°C. Output of the anneal stove, the tensile strength is 400N~600N.

4. Chlorhydric acid washing 

Galvanized wire's third stage is chlorhydric acid washing.

After the draw and anneal, the wire is thinner, softer but also much more dirty. It needs chlorhydric acid washing to remove the impurities.

Chlorhydric acid washing requires water pool and chlorhydric acid pool. The density of chlorhydric acid is 17%. In the Chlorhydric acid pool,

there is a caldron used for the emission of vapor.]

Standard coil  10kg,25kg,50kg and so on .we can coiled with customer’s order.

Package :inside with plastic film,outside with woven bags;

inside with plastic film,outside with hession.

Packingof 1.25mm black annealed wire :     

Each coil to be wrapped with pastic  inside and Hessian cloth ( or weaving bag) outside.

Coil weight from 0.5kgs 1000kgs.

Wire pictures of 1.25mm black annealed wire :