Black Annealed Wire

Why Choose High-Ductility Black Annealed Wire?

Black annealed wire (commonly referred to as soft black iron wire, tie wire, or annealed binding wire) is manufactured from high-quality low carbon steel rod through a controlled thermal annealing process. Heated in oxygen-free annealing furnaces, this steel wire achieves excellent flexibility, superior elongation, and consistent softness while retaining tensile strength. The resulting dark oxide layer and optional light anti-rust oiling provide reliable protection against atmospheric corrosion.

At XQJ Metal, we produce and export premium black annealed binding wire compliant with ASTM A641 and EN 10218 standards. Engineered for smooth twisting and tie-knotted operations without breaking, our wire coils are supplied in various gauges (BWG 8 to BWG 22) for rebar tying, agricultural baling, waste compaction, and wire mesh fabrication.

Technical Specifications & Wire Gauge Chart

>

Key Construction & Industrial Applications

• Construction Rebar Tying: Essential for fixing and tying reinforcing steel bars (rebar) in building foundations, concrete beams, bridge construction, and civil engineering frameworks.
• Baling & Industrial Packaging: Used in automatic and manual baling machines for binding waste paper, cardboard, recycled plastics, cotton, and agricultural hay.
• Wire Mesh Weaving & Industrial Binding: Woven into soft wire mesh screens, protective fences, floral arrangements, and heavy-duty industrial bundle wrapping.

Quality Control & Anti-Rust Packaging

• Protective Export Packaging: Wire coils are inner-wrapped with moisture-proof PE plastic film and outer-wrapped with durable hessian cloth or woven bags to prevent rust and physical abrasion during oceanic transit.
• Quality Assurance: 100% tensile strength testing, ductility inspection, and wire gauge precision check prior to dispatch. Every shipment is delivered with a EN 10204 3.1 Mill Test Certificate (MTC).
• Fast Dispatch & Lead Time: Standard BWG 16 and BWG 18 rebar tie wires dispatch within 5–7 business days; large volume custom coil weight orders ship within 10–14 business days.

Frequently Asked Questions (FAQ)

Q1: What is the main difference between black annealed wire and galvanized wire?

A: Black annealed wire undergoes heat treatment to maximize flexibility and softness, making it ideal for manual tying and twisting. Galvanized wire is coated with a zinc layer for long-term outdoor rust resistance and higher surface hardness.

Q2: Which wire gauge is most commonly used for concrete rebar tying?

A: BWG 16 (1.65mm) and BWG 18 (1.25mm) are the standard sizes globally used by rebar fixers for concrete structural tying due to their optimal balance of knot strength and flexibility.

Q3: How do you protect black annealed wire from rusting during ocean freight shipping?

A: We apply a specialized anti-rust oil coating to the wire surface during coil winding and seal each coil inside airtight plastic wrapping combined with moisture-absorbing desiccant bags.

If you require specific wire gauges, cut-to-length tie wires, or material test reports, explore our complete line of Wire Products or Contact Our Sales Engineering Team directly for a fast factory quotation.