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Quality Carbon Steel Deformed Bar Coils from China Suppliers - Reliable Factory for Construction Materials

Wire rod coils, also known as coiled threaded steel bars, are a widely utilized form of steel reinforcement in the construction industry. Manufactured in China, these products are hot-rolled into a spiral shape, offering a practical alternative to straight steel bars. Available in various diameters ranging from 6 mm to 14 mm, including popular specifications such as 6mm, 8mm, 10mm, and 12mm, wire rod coils can either feature a plain or ribbed surface, Key characteristics and advantages of wire rod coils include:, **Form and Convenience**: The coiled design significantly enhances transportation and storage efficiency, allowing for space-saving benefits. On-site, these coils can be easily straightened and cut to the necessary lengths, minimizing material waste and catering to projects that demand non-standard lengths. This feature is particularly appealing for builders seeking flexibility in their steel supply, **Mechanical Properties**: Produced using advanced high-speed wire rod rolling techniques, wire rod coils demonstrate high mechanical strength and excellent ductility. Their chemical composition aligns with national standards, ensuring that varieties like HPB300 (plain) and HRB400E (ribbed and seismic-resistant) provide reliable performance in varying construction applications, **Primary Applications**: These coils are extensively utilized in concrete structures, serving vital roles as stirrups, distribution bars, and reinforcements in beams, slabs, and columns. Additionally, due to their superior bendability, wire rod coils are ideal for manufacturing welded mesh, embedded components, and small structural elements, **Difference from Plain Wire Rods**: While plain wire rods possess a smooth surface suitable for producing thinner wires or other items like nails, wire rod coils feature ribbed surfaces tailored to enhance bonding with concrete. This design is crucial for reinforcing structural integrity, In conclusion, wire rod coils produced by top suppliers and factories in China represent a cost-effective, high-performance solution for modern construction needs. Their logistical and processing benefits make them a vital component in any construction project

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    Manufacturing complies with GB/T 706-2016 hot-rolling standards, with post-galvanization physical properties significantly upgraded: Zinc coating hardness reaches 250HV (35% higher than substrate), bending stiffness increases by 15% (ASTM E8 three-point test), while maintaining yield strength ≥235MPa. Zero uncoated defects ensured by 100% eddy-current testing (ISO 1461 Class A), surface homogeneity tolerance ≤±10μm.

    Excels in renewable energy and infrastructure: Ideal for solar mounting systems (UL 2703 certified, annual zinc loss <0.8%), offshore platform legs (resists chloride erosion, EN ISO 9227 CX class), and chemical plant frameworks (pH3-11 chemical tolerance per ASTM G31). Outperforms painted steel in installability – eliminating post-weld anti-rust treatment – with cut/punched edges self-protected by cathodic action (ASTM A780 repair compounds).

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    Leads in sustainability and economy: Zinc recyclability >95% (ISO 14021 certified), reducing lifecycle costs by 40%. Over a 30-year span, saves $220/ton in maintenance versus painted steel. EU exports comply with REACH Annex XVII lead-free requirements (Pb<0.01%), while US projects meet ASTM A123 Type 8 zinc specifications.

    Customization services: Equal/unequal angle cutting (±0.5mm laser tolerance), pre-punching/slotting (DIN 1022 standard), backed by SGS material certificates, third-party inspections, and ISTA 3E transit test reports.

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    Product Details

    Model number

    Equal Angle: e.g., L50×50×5 (50mm width, 5mm thickness).

    Unequal Angle: e.g., L100×80×8 (100mm long side, 80mm short side, 8mm thickness).

    Dimensions

    Equal Angle: Width 20-250mm, thickness 3-24mm.

    Unequal Angle: Long side 25-200mm, short side 16-125mm, thickness 3-18mm.

    Applications

    Construction (e.g., bridges, factory frameworks).

    Machinery manufacturing (equipment supports, connectors).

    Power transmission towers, brackets.

    Decorative engineering (e.g., metal doors/windows).

    Standards

    China: GB/T 706-2016 (Hot-rolled steel standard).

    International: ASTM A36 (USA), JIS G3192 (Japan), EN 10056 (Europe).

    Technology

     Production: Hot-rolling (high-temperature), cold-forming (room-temperature).

    Mechanical properties: Tensile strength ≥375MPa, yield strength ≥235MPa (e.g., Q235).

    Surface Treatment

    Galvanizing (anti-corrosion, for outdoor use).

    Painting/Powder coating (decoration or rust prevention).

    Black (untreated, direct use).

    Industry applications

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    FAQ

    • Q: How to verify zinc coating thickness? Rust prevention during shipping?

      A: Magnetic induction gauge (ISO 2178) with 3-point random sampling. VCI anti-rust agent + desiccants applied pre-shipment. Port reinspection available

       

    • Q: Can we return goods if dimensions exceed ±1mm vs drawing?

      A: ASTM A6 tolerance applies: ±0.8mm width, ±0.3mm thickness. Free replacement for non-conformity with inspection report..

       

    • Q: Do you provide UL 2703 certification for solar projects?

      A: UL-certified galvanized angles available (+15% cost). Certificate includes zinc composition & UV resistance data (5000hrs aging test).

       

    • Q: Can we order 1 ton trial? Who pays LCL charges?

      A: Minimum 22 tons for FCL. LCL surcharge: $180/ton. Recommend 15-ton full 20GP container.

       

    • Q: Compensation if straps break causing deformation?

      A: Submit photos + third-party survey report. Replacement shipped within 72 hours with freight covered.

       

    • Q: Can you drill holes per our drawings and remove zinc dross?

      A: Laser cutting/punching (±0.5mm tolerance) with automatic zinc-rich coating at cut edges (ASTM A780 compliant).

       

    • Q: Does it meet EU REACH lead content <0.1%?

      A: Zinc coating Pb <0.01% (SGS test-MSDS Section 15). CoC (Conformity Certificate) included.

    packaging

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