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Specially processed high-grade wire rods, flat bars, and structural steels manufactured to stringent international quality tolerances.
Heavy-duty structural framework profile offering superior torsional stability for automotive assembly lines and plant construction.
High-carbon steel wire rods optimized for fine filament wire drawing, radial tire carcass reinforcement, and high-pressure hose braids.
Advanced PVDF/HDP coated sheet ensuring exterior corrosion defense for automotive warehousing and modular logistics hubs.
Exceptional fatigue resistance, high yield strength, and superior elastic recovery designed for suspension leaf springs and dynamic dampers.
The global automotive transition toward electric mobility, smart transportation, and stringent carbon reduction goals has radically heightened the structural demands placed on pneumatic radial tires. Modern passenger car radials (PCR), truck and bus radials (TBR), and giant off-the-road (OTR) tires rely on hot rolled high-carbon steel wire rods as their fundamental structural backbone. Hot rolled steel wire rod, especially in grades ranging from C70D to C92D, serves as the vital precursor for tire cord, bead wire, and reinforcement belts.
With the rapid adoption of Electric Vehicles (EVs)—which exhibit 20% to 30% greater curb weight due to high-density battery packs alongside instantaneous high-torque transmission—tire reinforcement materials face unprecedented mechanical stresses. Hot rolled wire rods must deliver ultra-high tensile strength (reaching 3,600 to 4,000 MPa after patenting and multi-stage cold drawing) without sacrificing cold formability, torsion ductility, or fatigue life.
Higher tensile strengths (UT/MT grades) allow tire engineers to thin down wire cord diameters, cutting unsprung rotational mass by 8–15% and directly reducing vehicle rolling resistance.
Reinforced carcass plies and optimized bead rings prevent bead slippage against the rim and maintain directional carcass integrity during intense instantaneous acceleration cycles.
High-energy absorbing crown belt cords resist sharp projectile penetrations, high-speed curb strikes, and dynamic cornering shear fatigue under severe road conditions.
The production of hot rolled wire rod for tire reinforcement represents the pinnacle of high-carbon metallurgy, demanding near-zero non-metallic inclusions and pristine sorbitic microstructure.
During extreme multi-die high-speed wet drawing processes where raw 5.5mm wire rods are drawn down to ultra-fine filaments between 0.15mm and 0.38mm diameter, any non-deformable brittle inclusion (such as Al2O3 or TiN particles larger than 5 µm) inevitably leads to wire breakage ("cuppy breaks"). To safeguard zero-defect drawability, steelmakers implement advanced ladle metallurgy, vacuum degassing (RH/VD), and strict calcium/silicon deoxidation regimes that convert brittle aluminates into low-melting-point, deformable spessartite or anorthite-type silicates.
| Steel Grade | Carbon (C %) | Silicon (Si %) | Manganese (Mn %) | P & S (Max %) | Tensile Strength (MPa) | Key Application |
|---|---|---|---|---|---|---|
| C70D / 70# | 0.68 – 0.73 | 0.15 – 0.30 | 0.40 – 0.70 | ≤ 0.015 | 980 – 1050 | Standard Bead Wire, Carcass Ply Wire |
| C72D / 72A | 0.70 – 0.75 | 0.15 – 0.32 | 0.45 – 0.75 | ≤ 0.015 | 1010 – 1080 | Standard Tensile (ST) Radial Steel Cord |
| C80D / 82B | 0.78 – 0.83 | 0.15 – 0.32 | 0.45 – 0.75 | ≤ 0.012 | 1100 – 1190 | High Tensile (HT) & Super Tensile (ST) Cord |
| C86D / 86B | 0.84 – 0.89 | 0.15 – 0.35 | 0.40 – 0.70 | ≤ 0.010 | 1160 – 1250 | Ultra Tensile (UT) Belt & Cap Ply Cords |
| C92D / 92A | 0.90 – 0.95 | 0.15 – 0.35 | 0.30 – 0.60 | ≤ 0.008 | 1230 – 1320 | Mega Tensile (MT) Light-Weight Cordage |
Hot rolled steel wire rods achieve their exceptional downstream drawability through controlled thermomechanical rolling followed by controlled Stelmor forced-air cooling lines. The cooling rate is micro-engineered to avoid both brittle martensitic/bainitic formations and coarse free ferrite networks.
The resulting microstructure consists of over 90% uniform, fine-lamellar pearlite (sorbite) with an interlamellar spacing of less than 100 nm. This provides high initial tensile ductility, suppresses central segregation, and permits exceptional total reduction area ratios (>80%) during preliminary dry drawing without premature intermediate heat treatments.
From bead anchoring to tread stabilization, hot rolled steel wire transforms into specialized reinforcement components across every layer of the tire.
High-carbon wire is drawn to 0.89mm – 1.83mm, bronze-coated, and wound into continuous toroidal bead rings. Bead rings anchor the tire carcass securely onto the wheel rim, absorbing severe lateral rim stresses, preventing rim dislodgment, and sustaining internal inflation pressures under intense radial loads.
Brass-plated micro-filaments (0.15–0.38mm) are twisted into multi-strand cords (e.g., 2x0.30, 3x0.20+6x0.15) embedded beneath the tread rubber. These belts maintain tread flat contact, enhance cornering grip, dissipate centrifugal forces, and offer puncture defense against road hazards.
Extending beyond tire structures, the same high-tensile wire rod technology is utilized for spiral-wound and braided reinforcements inside automotive hydraulic power steering, pneumatic braking conduits, and industrial heavy-machinery hydraulic fluid lines.
Hansheng Technology (Hebei) Co., Ltd. is strategically located in Tangshan City, Hebei Province—the core steel manufacturing capital of China. Situated only 150 km from the major international Tianjin seaport and 150 km from Beijing Capital, our logistics network provides rapid sea and land freight connectivity across the globe.
Since our establishment in 2006, we have developed into a premier comprehensive manufacturing and exporting hub for prime quality steel products. Our industrial facility operates 8 advanced production lines with an annual capacity exceeding 300,000 to 650,000 metric tons. We specialize in Galvanized Steel Wire, Hot Rolled Steel Wire Rods, Hot/Cold Rolled Steel Plates and Coils, GI/PPGI, GL/PPGL, and structural section steels conforming strictly to global standards including GB, JIS, ASTM, DIN, EN 10025, and AS/NZS.
Driven by our corporate philosophy of "honoring contracts and keeping promises," we deliver high-efficiency supply, competitive market pricing, and dedicated engineering services, winning long-term trust from customers across the Middle East, Southeast Asia, East Asia, Africa, the Americas, and Europe.
Committed to engineering high-integrity steel materials that empower sustainable infrastructure and global transportation.
Trust. Confidence. Reliability; Passion for excellence; Integrity in everything we do; Empower people to strive and deliver; Adapt to changing market and consumer needs.
Focusing on prime building and reinforcement materials to create a safer, higher-quality life for human beings across the globe.
Continue to be the recognized leader and standard-setter in high-grade building materials and metallurgical wire products.
Since 2006, we have maintained an unblemished reputation of clientele trust, technical precision, and contractual reliability across 50+ export destinations.
Our corporate headquarters and heavy rolling mills reside in Tangshan, supported by specialized commercial branch networks across major industrial centers of China.
Our dedicated professional team comprises 35+ seasoned metallurgists, international logistics coordinators, and QA inspectors committed to fast-paced global client delivery.
Over 19+ years of export excellence, comprehensive QA testing, and integrated supply chain management.
Full manufacturing conformity to ASTM, JIS, DIN, EN 10025, AS/NZS, and GB standards with 100% mill test certificates (MTC).
Robust mass-production capacity ensures rapid fulfillment for both spot orders and recurring containerized tier-1 industrial supply contracts.
Transparent pricing mechanisms, prompt FOB/CIF quotations within hours, flexible payment terms, and direct technical consultations.
ISO9001:2000 and ISO14001 certified QA management; pre-shipment ultrasonic, eddy-current, and metallurgical batch testing performed without exception.
Explore our comprehensive inventory of wire rods, flat bars, coils, and structural steels engineered for commercial and heavy industrial deployment.
Superior zinc adhesion, corrosion resistance, and high ductility for tire bead wrap, fencing, and spring components.
Accurate dimensional tolerances, sharp square edges, and exceptional flatness for automotive chassis brackets and hardware.
Engineered for vehicle leaf springs, industrial suspensions, and resilient load-bearing construction applications.
Hot-dip galvanized steel coils providing robust sacrificial protection against oxidation in severe outdoor environments.
High-strength hot rolled coil and strip steel tailored for wheel rim fabrication, truck frame rails, and pressure vessels.
Premium prepainted galvanised and galvalume coil for insulated industrial wall cladding, roofing, and transport containers.
Equal and unequal angle bars offering high stiffness-to-weight ratios for vehicle mounting jigs and transmission towers.
Ultra-high corrosion-resistant ZAM coating that self-heals cut edges in automotive underside applications and maritime framing.