4.18mm Black Annealed Wire Product Introduction
1. Material
4.18mm black annealed wire is manufactured from high-quality low-carbon steel rods including Q195, Q235, SAE1006 and SAE1008. With low carbon content and few impurities, the wire features excellent ductility and soft texture. It is produced through professional processes of acid pickling, cold drawing and oxygen-free high-temperature annealing, fully complying with GB/T 343 national standard and international ASTM & EN industry standards.
2. Product Features
- Superior Flexibility & Toughness: Adopts high-temperature slow cooling annealing treatment to eliminate internal steel stress. The wire is soft and bendable, not easy to break after repeated winding and folding, with an elongation rate of more than 15%.
- Stable Mechanical Performance: It has a tensile strength of 350-400MPa. The 4.18mm thick wire has strong load-bearing capacity, suitable for heavy-duty binding work.
- Precise Uniform Specification: Strict wire diameter tolerance (±0.03mm), consistent color, hardness and thickness of the whole coil without uneven deviation.
- Non-slip Binding Surface: The uniform black oxide layer on the surface provides good friction, ensuring firm binding and no slipping.
- High Cost Performance: No galvanized coating, greatly reducing production cost. It is the most economical binding material for dry and indoor working environments.
- Easy Secondary Processing: The wire can be easily straightened, cut, bent and spot welded, and is an ideal raw material for making U-type wire, cut wire and welded wire mesh.
- Short-term Rust Resistance: Finished products are lightly coated with industrial anti-rust oil for moisture and oxidation resistance during short-term sea transportation and indoor storage.
3. Surface Treatment
The core treatment is oxygen-free high-temperature annealing, which forms a uniform matte black iron oxide film on the wire surface to achieve the inherent black appearance. After annealing, the wire is sprayed with a thin layer of environmental anti-rust oil for auxiliary moisture-proof protection. No zinc coating or PVC coating is attached, maintaining the pure low-carbon steel structure of the product. Custom oil-free dry wire is available upon customer requirements.
4. Export Packaging Standard
We adopt professional sea-worthy packaging to ensure intact long-distance transportation:
- Inner Package: Covered with waterproof PE plastic film to isolate moisture and sea water humidity.
- Outer Package: Wrapped with thick woven bags or burlap bags for anti-collision and wear resistance.
- Conventional Coil Weight: 25kg/coil, 50kg/coil; customized weight from 10kg to 100kg is acceptable.
- Integrated Reinforcement: Finished coils are neatly placed on wooden pallets, fixed with steel belts and fully wrapped with stretch film. Each coil is attached with a standard English label marked with wire diameter, material, net weight, gross weight and batch number.
- Custom Package: Carton packaging for small retail orders is optional.
5. Application Fields
4.18mm black annealed wire is widely used for heavy binding and metal processing in various industries:
- Construction Industry: Binding steel bars, fixing building precast components, scaffolding and pipeline binding in construction sites.
- Agriculture & Warehousing: Bundling straw, wood and steel pipes, fixing greenhouse frames and orchard fence reinforcement.
- Wire Mesh Processing: Raw material for producing welded wire mesh, protective mesh and breeding mesh, suitable for deep processing of various metal wires.
- Industrial & Logistics: Fixed packaging of steel profiles, mechanical equipment and heavy goods, replacing plastic packing belts for stronger load-bearing performance.
- Craft & Civil Use: Used for iron art decoration, garden modeling, manual metal weaving and daily simple fixing work.
6. Advantages & Notes
Black annealed wire is more cost-effective than galvanized wire and tougher than ordinary hard drawn wire. It is recommended for indoor, dry environment and short-term marine transportation. It is not suitable for long-term outdoor wet and corrosive environments. The HS code is 7217100000 for smooth customs clearance.
Post time: Jun-29-2026