What is Annealed Wire?
Annealed wire is produced through thermal annealing, endowing it with excellent flexibility and high tensile strength. Annealed wire has similar gauge to galvanized iron wire – 0.15 mm to 5 mm (wire gauge 6 G to 38 G), but has better softness and color uniformity than galvanized iron wire. In agriculture, the wire is called “baling hay wire” for its baling application. In civil construction, the wire is called “burnt wire” for its fixing and reinforcement application.
To create annealed wire, the manufacturer starts with a low carbon steel wire. From there, the annealing process is used to achieve a finished product. Annealing involves heating the wire to a specific temperature before cooling it at a prescribed rate in order to achieve the desired result.
Annealing is used with the goal of increasing the ductility of the wire and reducing the hardness. This allows the wire to be flexible while still remaining durable. With these properties, annealed wire is self-tying and can stay in place when wrapped around itself.
How it’s Made
The untreated baling wire is exposed to the annealing process where it’s heated and cooled in a specific cycle in order to alter the physical and chemical composition of the metal. The process uses thermodynamics and the metal’s ability to react to heat to get the desired results. Annealing removes some of the hardness present in the metal and makes it much more ductile, which is a useful property in wires.
Annealed wires are much more flexible and easy to work with, which is why they’re commonly used in the recycling and baling industry. The underlying material is always steel and in most cases, the steel is galvanized for added resilience. The process for ferrous materials like steel is different because they react differently to heat.
While other materials are cooled down instantly by a dip in the water, steel is cooled over time to ensure the material doesn’t crack or become brittle during the process. The gradual cooling allows the metal to settle and retain the ductility and flexibility needed.
Black annealed wires also have a thin coating of light oil on it to help it pass through the baling machine easily. The oil also protects it from the environment and ensures it doesn’t rust. The wires are simply dipped into special oil until they’re all evenly coated before they’re coiled and packed away. You need to purchase black annealed wires from reliable manufacturers to ensure there’s no fault or weaknesses in them.
- Various weights and dimensions.
- High tensile strength and stability.
- Excellent flexibility and softness.
- Good anti-corrosion and anti-oxidation.
- Oxygen free annealing process.
- Bright, smooth and beautiful surface.
- Long service life.
What are the uses of annealed wire?
Annealed wire is used in:
- Construction industry – mainly for iron setting in the civil construction field.
- Packaging of products – used as tie wire.
- Silk weaving
- Hay bailing in the agricultural field.
- Fencing products including barbed wire