ALL PRODUCTS

Black Annealed Tie Wire

Black Annealed Tie Wire (also known as soft annealed binding wire or black iron wire) is a low-carbon steel wire that has undergone an annealing process to increase flexibility and reduce brittleness. It features a dark oxide surface (from annealing) and is commonly used for bundling, baling, and light construction applications due to its ease of handling and knotting.

Overview
Related Products

Black Annealed Tie Wire

name	Black Annealed Tie Wire
Material	low carbon wire
Size	Wire Diameter：0.8mm (20 AWG) to 2.5mm (12 AWG)
Application	weaving wire mesh,baling or construction.
Characteristic	softer than ordinary black wire Stronger flexibility,Uniformity of softness,chromaticity is the same.
Package	Inside with plastic fim,outside weaving bag. inside with plastic film,outside hessian cloth.

Product Overview

Black Annealed Tie Wire (also known as soft annealed binding wire or black iron wire) is a low-carbon steel wire that has undergone an annealing process to increase flexibility and reduce brittleness. It features a dark oxide surface (from annealing) and is commonly used for bundling, baling, and light construction applications due to its ease of handling and knotting.

1.Key Specifications

Material：Low-carbon steel (Q195, SAE 1008-1010)

Wire Diameter：0.8mm (20 AWG) to 2.5mm (12 AWG)

Tensile Strength ：300–500 N/mm² (soft annealed for flexibility)

Surface : Smooth, dark oxide layer (uncoated)

Elongation: ≥15% (excellent ductility)

Standards :ASTM A641, ISO 8458-1, EN 10218-2

2.Manufacturing Process

Wire Drawing: Cold-drawn to precise diameters.

Annealing: Heated to 650–750°C in a controlled atmosphere, then slowly cooled to soften the wire.

Surface Oxidation: Natural dark oxide layer forms during cooling (no additional coating).

Spooling: Wound onto coils (typically 5kg–50kg) or spools (100kg–500kg).

3. Applications

Construction: Tying rebar, securing scaffolding, bundling pipes.

Agriculture: Baling hay, trellising plants, fencing repairs.

Packaging: Binding cardboard, securing pallet loads.

DIY/Home Use: Crafts, temporary fixes, gardening.

4. Competitive Advantages

✔ Superior Flexibility: Easy to twist and knot by hand (unlike hard-drawn wire).
✔ Rust-Resistant Oxide Layer: Mild corrosion protection for indoor/short-term outdoor use.
✔ Cost-Effective: 20–30% cheaper than galvanized or PVC-coated wires.
✔ Wide Compatibility: Works with manual tools or automatic baling machines.

5. Quality Assurance

Bend Test: Wrapped around a mandrel (2x diameter) without cracking.

Dimensional Tolerance: ±0.02mm for consistent diameter.

Batch Certification: Mill test reports (MTRs) available.