Black Annealed Wire
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Cold drawn low carbon steel wire obtained by drawing and through an annealing heat treatment, giving the wire a high ductility and malleability suitable for different uses and applications.
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Technical characteristics
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Material
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Tensile Strength
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Diameter Tolerance
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Low Carbon Steel
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350N/mm2
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+-0.5mm
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Product Description
Black annealed wire is a type of low carbon steel wire that has undergone an annealing process, which involves heating and slow cooling to make it softer and more flexible. This process also gives the wire its characteristic black color and improves its ductility and corrosion resistance. It’s commonly used in construction, agriculture, packaging, and various other industries due to its flexibility and strength.
Black annealed steel wire is a low carbon steel wire that undergoes a thermal annealing process to become soft, flexible and easy to tie, making it one of the most widely used binding materials in construction, agriculture, packaging, and industrial applications worldwide.
Black annealed wire, also known as black binding wire, soft annealed black wire, or black iron wire, is manufactured from low‑carbon steel (e.g., Q195, Q235, SAE1006/1008) through controlled heat treatment and cooling. This process improves the wire’s ductility, flexibility and workability, while the black oxide finish gives corrosion resistance and a uniform surface.
Annealing Process and Benefits
- High temperature heating → controlled cooling
- Reduced hardness and internal stress
- Increased ductility and flexibility
- Smooth black oxide surface
- The annealed process ensures the wire is easy to bend and tie without cracking or breaking — ideal for manual or automated applications.
Black Annealed Wire Key Characteristics and Properties
- Soft and flexible: Annealing makes the wire easier to bend, twist, and manipulate.
- Corrosion resistance: The annealing process can improve the wire’s resistance to rust and corrosion.
- High tensile strength: While softer, it retains a good level of strength to withstand tension.
- Cost-effective: Black annealed wire is often a budget-friendly option for many applications.
Applications of Black Annealed Wire
This wire is versatile across sectors due to its balance of strength and flexibility.
Construction Industry
Used as rebar tying wire, reinforcement binding and structural fastening in concrete works and formwork setups.
Agriculture & Farming
Ideal for fencing, crop support, trellis wires, animal pens, and general binding tasks.
Packaging & Logistics
Ties bundles of timber, metal bars, cable reels, and other heavy materials during shipment.
Industrial & Manufacturing
Used in making wire mesh products, reinforcement cages, cages and net frames.