Hot-Sale Cold Drawn Wire & Structural Mill Showcase
Explore our foundational long products, precision drawn wires, structural shapes, and processed steel coils maintained in year-round stock for urgent container dispatch and long-term supply programs.
SAE1006 / SAE1008 Cold Drawn Wire Rods
Precision drawn low carbon wire rods for nail manufacturing, mesh weaving, cold heading fasteners, and fine binding wire.
SAE1080 / Q235 High Tensile Wire Rods
Spring-grade and high-tensile wire rod feedstock optimized for drawing prestressed concrete wires, suspension springs, and steel rope.
ASTM A36 / Q235B / Q355B H-Beams
Heavy structural wide-flange profiles for portal frames, high-load warehouse columns, platforms, and infrastructure bridge girders.
Q235B / Q355B Cold & Hot Rolled Coils
Premium mill cold rolled bright sheet coils and HR slit coils engineered for precision stamping, tube roll-forming, and automotive framing.
Galvanized Structural & Pressure Steel Pipes
Hot-dip zinc protected ERW circular and hollow section tubes designed for scaffolding, industrial greenhouse framing, and fluid transfer.
Galvanized Plain Round & Tie Bars
Solid smooth round bar rods with uniform hot-dip zinc layers for marine piling ties, electrical grounding rods, and industrial machine shafts.
Q235 / Q355 Galvanized Flat Bar (3-60mm)
Heavy-duty corrosion-resistant flat bar steel utilized in substation grounding grids, bracket fabrication, shipbuilding, and architecture.
Deformed Reinforcing Rebar (6mm - 32mm)
High-yield ribbed concrete reinforcement bars compliant with BS 4449, ASTM A615 Grade 60, and GB/T 1499.2 for commercial foundations.
The Science of Custom Cold Drawn Wire Rods: Metallurgy, Reduction & Grain Alignment
A rigorous metallurgical overview detailing how raw billet chemistry, mechanical descaling, continuous die reduction, and specialized spheroidizing transform standard hot-rolled coils into micro-tolerant, high-performance cold drawn wire rods.
Feedstock Chemistry & Clean Steel Refining
High-integrity cold drawing starts at the continuous caster. HZXY exercises stringent secondary ladle refining (LF/VD) to restrict deleterious inclusions (sulfur ≤ 0.015%, phosphorus ≤ 0.020%, and total dissolved oxygen ≤ 15 ppm). For critical cold heading quality (CHQ) wires such as 10B21 or SCM435, vacuum degassing eliminates hydrogen embrittlement hazards, preventing internal chevron micro-cracking during cold plastic deformation.
- Secondary Vacuum Degassing (VD) treatment
- Macro-inclusion control to ASTM E45 Method A
- Uniform chemical segregation indices (C-seg ≤ 1.05)
Multi-Stage Die Drawing & Work Hardening Control
During cold drawing through progressive tungsten carbide or polycrystalline diamond (PCD) dies, the cross-sectional area is reduced by 15% to 35% per pass. This plastic deformation elongates ferrite-pearlite grain structures along the drawing axis, drastically boosting yield strength and surface hardness while preserving the core ductility required for secondary upsetting, bending, or thread rolling.
- Tungsten carbide drawing dies with optimal approach angles
- Automated continuous temperature-controlled dry lubes
- Real-time eddy current testing for longitudinal seam detection
Protective Atmosphere Annealing & Spheroidizing
For high-performance automotive fasteners and precision springs, wire rod coils undergo bell-type protective atmosphere (100% pure Hydrogen) annealing. Spheroidizing transformation changes brittle lamellar pearlite into uniform globular cementite particles within a ferrite matrix, enabling spheroidization rates exceeding 90% without surface decarburization (total decarb depth < 0.05 mm).
- Spheroidization rating > 92% to ASTM A892
- Zero-oxidation pure hydrogen convective atmosphere
- Superior cold formability avoiding die gouging
| Dimensional & Mechanical Metric | Standard Hot-Rolled Wire Rod | Commercial Cold Drawn Wire Rod | HZXY Precision Engineered CHQ Wire Rod |
|---|---|---|---|
| Diameter Tolerance | ±0.40 mm to ±0.50 mm (GB/T 14981) | ±0.04 mm to ±0.08 mm (ISO h11) | ±0.015 mm to ±0.025 mm (ISO h9/h10) |
| Ovality / Out-of-Roundness | ≤ 0.40 mm max variation | ≤ 0.04 mm | ≤ 0.012 mm continuous circularity |
| Surface Finish (Ra value) | Mill scale rough (Ra > 6.3 µm) | Drawn matte (Ra 1.6 - 3.2 µm) | Super-bright / Polished (Ra ≤ 0.8 µm) |
| Tensile Uniformity (Within Coil) | Fluctuation ±50 to ±80 MPa | Fluctuation ±30 MPa | Tight variance ≤ ±15 MPa across 2,000kg coil |
| Decarburization Depth | Up to 1.5% of wire diameter | Partial decarb present | Zero complete decarb / Total < 0.5% d |
Macro Industry Solutions: Engineered Feedstock for Critical Assemblies
Cold drawn steel wire rods serve as the vital arterial input for multi-billion dollar manufacturing supply chains worldwide. Discover how our metallurgical tailoring meets exact industry parameters.
Automotive & Aerospace Cold Heading (CHQ)
Engineered for high-speed multi-station bolt formers producing Grade 8.8, 10.9, and 12.9 engine fasteners, wheel studs, and suspension linkages. Formulated in 10B21, 10B33, SCM435, and 40Cr with zinc phosphate and polymer lubrication, our wire rods completely suppress tool galling and head cracking during extreme cold heading deformation.
Mechanical Suspension & Valve Springs
Utilizing high carbon and alloy grades such as SAE1070, SAE1080, and 65Mn, cold drawn wire rods undergo precision patenting or induction heat treatment to yield optimal shot-peening longevity. Unmatched fatigue life cycles exceeding 10 million cycles make them the benchmark for engine valve springs, clutch springs, and industrial vibration absorbers.
Prestressed Concrete & Civil Infrastructure
Our high-tensile cold drawn wire rod bundles feed automated stranding lines producing 1,860 MPa low-relaxation prestressed concrete (PC) strands. Applied across long-span bridges, railway viaducts, LNG containment tanks, and commercial foundation piling where zero-failure metallurgical reliability is legally mandated.
China Factory 4.0: Supply Chain Resilience & Cluster Efficiency
Headquartered in Daqiuzhuang Industrial Zone, Jinghai District, Tianjin—with massive secondary facilities in Tangshan—HZXY harnesses the planetary epicenter of steel manufacturing to provide unassailable price-performance and rapid lead times.
Daqiuzhuang & Tangshan Megacluster Advantage
Operating across 1,500 acres of production and processing facilities, HZXY is deeply integrated into the world's dense concentration of blast furnaces, electric arc furnaces (EAF), continuous billet casters, and wire draw-benches. Within a 30-kilometer radius, we source ultra-clean hot-rolled feedstock, pickling agents, automated drawing dies, and protective atmosphere equipment. This agglomeration eliminates inter-provincial shipping delays, shielding global contractors from raw material volatility.
Automated In-Line NDT & Digital Traceability
Our intelligent drawing benches feature closed-loop laser micrometer feedback systems that adjust drawing capstans in real-time, holding wire rod tolerances within ±0.015 mm over thousands of running meters. Simultaneously, automated eddy-current inspection and ultrasonic defect scanners flag surface fissures, seams, or internal slag inclusions. Every outgoing coil receives a thermal laser-etched QR tag indexing heat number, chemistry, tensile profile, and reduction data back to the original melt shop.
Localized Support & Global Compliance Framework
Ensuring complete peace of mind for engineering teams, quality auditors, and EPC contractors. Our mill documentation, lab testing, and international grade mapping conform rigorously to global standards.
Mill Test Certificates to EN 10204 3.1 & 3.2
Every shipment is accompanied by verified Mill Test Reports (MTR) including ladle spectrographic chemical analysis, yield strength (ReH/Rp0.2), ultimate tensile strength (Rm), elongation (A5/A10), reduction of area (Z%), and Brinell/Vickers hardness. Third-party testing with SGS, Bureau Veritas, or TÜV Rheinland can be arranged prior to vessel departure.
Decarbonization, CBAM & ISO 14001 Standards
As international supply chains enforce strict environmental standards, HZXY actively manages its embedded carbon emissions in compliance with the EU Carbon Border Adjustment Mechanism (CBAM). By coupling scrap-based Electric Arc Furnace (EAF) options with solar-assisted drawing lines, we provide verified Product Carbon Footprint (PCF) disclosures.
Multi-Jurisdiction Grade Equivalency Matrix
Our metallurgists assist international buyers in translating regional standards seamlessly. From US ASTM/AISI parameters to European EN 10016 / EN 10263, German DIN, and Japanese JIS G3505/G3507, we ensure exact mechanical performance equivalency during formal order confirmation.
| China (GB/T) | United States (ASTM / AISI) | European Union (EN) | Japan (JIS) | Typical Carbon (C%) | Primary Industrial Use-Case |
|---|---|---|---|---|---|
| Q195 / Q215 | AISI 1006 / 1008 | 1C06 / C4D (EN 10016) | SWRM 6 / 8 | 0.06% - 0.10% | Nail wire, electro-galvanized mesh, binding wire |
| Q235B | ASTM A36 / Grade C | S235JR (EN 10025) | SS400 | 0.14% - 0.22% | Structural tie rods, welding electrodes, brackets |
| ML08Al / SWRCH8A | AISI 1008 CHQ | C8C (EN 10263) | SWRCH 8A | 0.06% - 0.10% | Cold heading rivets, blind fasteners, small screws |
| ML20MnTiB | ASTM A574 / 10B21 | 20MnB4 (EN 10263) | SWCHB 21 | 0.18% - 0.23% | High-strength Grade 8.8 / 10.9 automotive bolts |
| 65Mn / 70 | AISI 1065 / 1070 | C68D / C72D | SWRH 67B / 72B | 0.62% - 0.75% | Mechanical springs, mattress wire, high-wear parts |
| Q355B (GB/T 1591-2018) | ASTM A572 Grade 50 | S355JR (EN 10025) | SM490A | ≤ 0.20% | Heavy portal frames, transmission towers, bridges |
Global Enterprise Procurement: RFQ Optimization & Seaworthy Logistics
Purchasing cold drawn steel wire rods across continents requires flawless coordination of coil dimensioning, rust inhibition, container stuffing, and maritime Incoterms.
Inland Hub to Tianjin Port Freight Corridor
Our Daqiuzhuang facilities maintain private bonded marshalling yards and dedicated heavy truck corridors directly to Tianjin Port (Xingang), China's premier northern maritime gateway. Container drayage takes less than 90 minutes, enabling rapid customs clearance, flexible vessel booking, and immediate container stuffing under roofed conditions.
Heavy Seaworthy Anti-Corrosion Packaging
Cold drawn bright surfaces require absolute protection against marine salt air and temperature condensation. Every coil is treated with eco-friendly Volatile Corrosion Inhibitor (VCI) oil, shrouded in multilayer waterproof woven geotextile fabric, reinforced with internal metal edge protectors, and secured with radial high-tensile steel straps.
Mixed Consolidations & Structured Trade Finance
Reduce procurement administrative overhead by combining wire rods, rebar, H-beams, hollow sections, and pipe valves inside a single Letter of Credit (L/C at sight / usance L/C) and single Bill of Lading. Our multilingual trade team coordinates forward hedging, FOB/CIF/DDP Incoterms, and destination customs support.
Engineering Proven on Iconic Megaprojects
From Olympic venues to intercontinental aviation hubs and long-span marine crossings, materials manufactured by HZXY have passed the world's most exacting structural audits.
Technical Questions Overseas Buyers Ask Before Sourcing
Answers to complex queries regarding metallurgical chemistry, tolerances, coil packing, minimum orders, and cross-border quality validation.
What is the difference between hot-rolled wire rods and cold drawn steel wire rods?
Hot-rolled wire rod is hot-formed directly off billet roll stands at temperatures above recrystallization (> 900°C), resulting in loose tolerances (±0.4 mm), surface mill scale, and lower yield strength. Cold drawn wire rod is pulled through precision dies at ambient room temperature, generating bright, scale-free surfaces, tight dimensional accuracy (h9–h11, ±0.015 mm), and significantly elevated yield and tensile strength through strain hardening.
Can HZXY produce custom cold drawn wire rods to ISO h9 or h10 tolerances?
Yes. Utilizing modern multi-hole continuous drawing machines equipped with automated laser diameter feedback and tungsten carbide/PCD dies, we consistently manufacture to ISO h9, h10, and h11 tolerance classes. Out-of-roundness (ovality) is tightly constrained to less than 50% of the total diameter tolerance band.
Which wire rod grades are best suited for cold heading quality (CHQ) bolts?
For low to medium strength fasteners, low-carbon grades like SAE1008, SWRCH8A, and SWRCH18A are ideal. For high-tensile Grade 8.8, 10.9, and 12.9 automotive bolts, we supply boron-alloyed 10B21 and chrome-moly SCM435 / 40Cr. These coils undergo spheroidizing annealing (spheroidization rate > 90%) to prevent cold shear fractures.
How does HZXY protect cold drawn bright wires from rusting during sea freight?
Cold drawn bright surfaces receive an active coating of high-grade volatile corrosion inhibitor (VCI) oil, followed by interior stretch-film wrapping, a moisture-proof VCI barrier paper or heavy geotextile outer woven wrap, sturdy plastic/metal core protectors, and multiple high-tension steel radial straps. Desiccant bags are added when loading into 20ft/40ft maritime shipping containers.
What is the standard coil weight, inner diameter (ID), and outer diameter (OD)?
Standard packaging provides continuous coil weights ranging from 1,000 kg up to 2,500 kg per coil to maximize payoff efficiency in high-speed forming machines. Typical inner diameters are 500 mm to 600 mm, with outer diameters up to 1,100 mm to 1,300 mm. Custom cut-to-length straight bar rods (1m to 12m) are also supplied bundled in hexagonal packs.
Do you provide Mill Test Certificates, and can independent inspectors verify our order?
Yes. Every batch ships with an authentic Mill Test Certificate compliant with EN 10204 Type 3.1 certifying chemistry, mechanical properties, and surface quality. We routinely host third-party inspection agencies appointed by buyers (such as SGS, Bureau Veritas, Intertek, and TÜV) to witness pre-shipment sampling, dimensional audits, and tensile testing.
Can I combine wire rods with structural beams, coils, and pipes in one shipment?
Absolutely. One of HZXY’s foremost commercial advantages is our one-stop structural consolidation. Contractors and distributors can combine cold drawn wire coils, deformed rebar, structural H-beams, channel steel, galvanized pipe, and drainage valves inside a unified bill of materials, saving massive freight and bank documentation costs.
Where is HZXY located and how fast can export containers be dispatched?
HZXY is based in the Daqiuzhuang Industrial Zone, Jinghai District, Tianjin, with secondary facilities in Tangshan. Stock orders can be packaged and delivered to Tianjin Port within 48 to 72 hours. Custom drawing, annealing, and size-specific production runs are typically completed and loaded within 15 to 25 calendar days.
Expanded Sourcing Lines: Beams, Sections, Tubing & Infrastructure
Coordinate your entire structural procurement package. Pair custom cold drawn wire rods with certified hot-rolled profiles, pipes, and MEP systems from our 1,500-acre Tianjin and Tangshan manufacturing bases.
Hot Rolled Structural I-Beams
Heavy structural standard I-beams engineered for multi-story floor joists, industrial overhead crane runways, and support pillars.
Perforated & Plain Galvanized Angle Steel
Equal and unequal structural angle bars for electrical transmission towers, solar racking brackets, and truss frameworks.
U & C Profile Hot Rolled Channel Steel
Certified structural steel channels for machinery frames, vehicle chassis, purlins, and curtain wall bracing.
Solid Structural Carbon Steel Square Bar
Hot rolled and cold drawn solid square bars for architectural grilles, forged machine shafts, and industrial hardware fabrication.
Double-Coated PPGI & PPGL Roofing Coils
Color coated steel coils with superior PVDF / PE finishes for corrugated roofing sheets, insulated wall panels, and home appliances.
High Pressure Industrial Pipeline Valves
Flanged gate, ball, butterfly, and check valves matched directly to pipe diameters and pressure ratings for HVAC, water, and gas networks.
PVC & PE Water Supply, Conduit & Drainage
Non-corrosive civil infrastructure piping for electrical cable conduit, municipal storm drainage, and agricultural irrigation networks.
Black Carbon & Welded Industrial Steel Pipes
Heavy wall carbon steel pipes and square hollow sections for engineering frames, fluid piping, and mechanical structural columns.
Request Your Custom Cold Drawn Wire Rod Quotation & Technical Catalog
Partner directly with Tianjin Huizhong Xinyu (HZXY). Connect with our senior metallurgical engineering and international logistics team to receive comprehensive coil pricing, weight optimization calculations, and mill test certificates within 24 hours.