Galvanized Plain Round Bar
Hot-dip galvanized surface engineered for severe marine and industrial wear. Uniform thickness ensures corrosion immunity.
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Direct Mill Catalog
Standard & Custom Round Bar Inventory Matrix
Procure round bar lots alongside integrated section steels. Guaranteed full traceability with MTC documentation verified against ASTM, GB, EN, and JIS thresholds.
Deformed Rebar 6mm–12mm
High-tensile ribbing structure designed for high-density structural foundations, bridge piers, and modular concrete frames.
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SAE1080 / Q235 Wire Rod
Hot rolled coils for precision continuous drawing, high-load mesh production, and high-tensile spring fabrication.
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SAE1006 / SAE1008 Drawn Wire
Low-carbon engineered chemistry with exceptional elongation for nail manufacturing and automated wire processing.
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A36 / Q235B Grade H-Beam
Dimensional load-bearing members with wide flange tolerance, suited for commercial multi-span warehouse superstructures.
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Hot Rolled Q235B Flat Bar
Tight dimensional tolerances across widths and thicknesses for framing, earthing grids, and fabrication components.
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Galvanized Channel Steel
High-yield hot rolled C and U channels featuring factory applied anti-oxidation barriers for demanding applications.
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Galvanized Angle Steel
Equal and unequal configurations pre-punched for power transmission towers and industrial racking assemblies.
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Market Whitepaper
China Round Bar Price Determinants & Global Trade Realities
An authoritative technical breakdown of raw feedstock variables, mill yield efficiency, and logistics optimization metrics shaping the global structural steel landscape.
Upstream Feedstock & Metallurgical Parity
The price of Chinese round bar is directly correlated with imported iron ore indices (62% Fe CFR Qingdao) and domestic metallurgical coking coal prices. Because Tianjin and Tangshan processors sit directly within the Hebei smelting cluster, transport premiums for liquid hot metal are drastically reduced, keeping billet baseline pricing lean compared to international peers.
Hot-Rolled vs. Cold-Drawn Variances
Engineering procurement requires clear distinction between standard black hot-rolled round bars (used for structural forging and dowel rods) and cold-drawn bars requiring precision sizing (h9 to h11 diameter limits). Deep processing additions—such as annealing, pickling, peeling, and skin pass processing—introduce clear yield-loss cost bands across technical purchase orders.
Port Clustering & Ocean Freight Economics
Export arbitrage depends on container and break-bulk logistics. Operating from the Daqiuzhuang Industrial Zone offers HZXY rapid consolidation via Tianjin Xingang Port. Loading high-density steel round bars as bottom-tier ballast paired with high-cube hollow sections or pipes yields significant shipping container freight reductions for global buyers.
10M+
Metric Tons Annual Mill Capacity
1,500
Acres Production Footprint in Tianjin & Tangshan
50+
Destination Countries Supplied
30
Years Operational Experience (Est. 1996)
Engineering Specifications
International Structural Round Bar Equivalency Guide
A cross-standard breakdown to help overseas project engineers bridge Chinese GB criteria with ASTM, EN, and JIS standards during cross-border material evaluation.
| China (GB/T) | USA (ASTM) | Europe (EN) | Japan (JIS) | Yield Strength (Min) | Primary Industrial Sector |
|---|---|---|---|---|---|
| Q235B | ASTM A36 | S235JR (1.0038) | SS400 | ≥ 235 MPa | General Structural Framing, Threaded Tie Rods, Anchor Bolts |
| Q355B | ASTM A572 Gr.50 | S355JR (1.0045) | SM490A | ≥ 355 MPa | High-Stress Machine Shafts, Wind Tower Bases, Heavy Crane Rails |
| 45# Carbon Steel | AISI / SAE 1045 | C45E (1.1191) | S45C | ≥ 355 MPa (Normalized) | Rotational Drive Axles, Gears, Forged Valve Stems, Machine Spindles |
| 40Cr Alloy | AISI / SAE 5140 | 41Cr4 (1.7035) | SCr440 | ≥ 785 MPa (QT) | Automotive Connecting Rods, High-Pressure Flange Studs |
| SAE1006 / SAE1008 | ASTM A510M | C9D (1.0304) | SWRM6 / 8 | Low Carbon Yield | Cold Heading, Wire Drawing, Fastener Manufacturing |
Note: Chinese standard GB/T 1591-2018 officially established Q355 as the modern replacement for legacy Q345, providing a precise 355 MPa minimum yield for enhanced load factors.
Integrated Processing
Deep Processing & Quality Control Systems
Transforming raw mill bars into ready-to-assemble structural assets. Processing lines eliminate extra jobsite fabrication and scrap loss.
Cold Calibration & Centerless Grinding
High-tolerance requirements for hydraulic pistons, elevator rails, and linear drive shafts rely on modern bar peelers and centerless grinders. Diameter accuracy is held within ISO h8/h9 brackets, paired with continuous eddy-current surface inspection.
Controlled Quenching & Tempering (Q+T)
Computerized induction and continuous roller-hearth heat treatment lines process medium carbon and low alloy round bars. This delivers uniform Martensitic-Bainitic microstructures that balance high yield strength with verified sub-zero Charpy V-notch impact toughness.
Hot-Dip Zinc Immersion Protection
Operating hot-dip galvanizing lines within the Tianjin hub enables zinc layer deposition up to 610 g/m² (85 µm). A metallurgically bonded Fe-Zn alloy layer seals out moisture and chlorides for solar tracking racks, bridge hangars, and marine piers.
Proven Performance
Engineering Realization in Mega-Scale Infrastructure
HZXY materials, structural sections, and processed profiles serve landmark construction projects requiring strict metallurgical reliability.
Marine Bridges & Viaducts
Project: Jiaozhou Bay Bridge. High-load foundational cages, marine-grade anchor shafts, and structural profile frames built to handle continuous salt-spray environments and dynamic tidal fatigue.
Aviation & Space-Frame Hubs
Project: Beijing Daxing Airport. High-tensile solid tie rods and precision welded nodal steel frameworks spanning extensive column-free terminal facilities with tight architectural tolerances.
Landmark Public Venues
Project: National Stadium (Bird's Nest). High-integrity structural assemblies, solid bracing pins, and heavy connection components engineered to manage complex multidirectional loads.
Procurement Intelligence
Frequently Asked Questions: China Round Bar Sourcing
Clear, direct answers for global supply chain managers, EPC buyers, and structural fabricators evaluating round bar prices from China.
What factors most influence the export price of Chinese steel round bars?
The FOB export price for China round bar is mainly driven by three factors: primary raw material costs (iron ore and coking coal), domestic blast furnace utilization rates governed by environmental policies, and logistics efficiencies within production hubs like Tianjin and Tangshan. Additionally, value-added processing (such as cold peeling, precision cutting, or hot-dip galvanizing) creates a natural price tier over basic hot-rolled black bars.
Can round bars, rebar, steel profiles, and pipes be combined in a single shipment?
Yes. Consolidating full Bills of Materials (BOM) is a core advantage of HZXY's operation. Operating across 1,500 acres of inventory yards in Daqiuzhuang and Tangshan allows us to bundle heavy solid round bars, deformed rebar, structural H-beams, and hollow steel or PVC pipes into consolidated containers or break-bulk vessels. This simplifies export customs clearance and helps maximize container weight-to-volume efficiency.
How does HZXY ensure metallurgical quality and international standard compliance?
Every production run undergoes strict chemical analysis (via optical emission spectrometry) and mechanical testing (yield, tensile, and elongation). All shipments include formal Mill Test Certificates (MTC) conforming to EN 10204 Type 3.1. We routinely coordinate with independent inspection agencies (SGS, Bureau Veritas, Intertek) to verify dimensions, straightness, and chemical heat traceability prior to vessel loading.
What are the key technical differences between Q235B and Q355B round bars?
The core difference lies in minimum yield strength: Q235B guarantees a minimum yield of 235 MPa, making it ideal for bending, threading, and light welded structures. Q355B (the updated successor to Q345B under GB/T 1591-2018) delivers a minimum yield of 355 MPa through micro-alloying (Vanadium, Niobium, or Titanium), making it better suited for heavy machinery pins, high-stress shafts, and structural frameworks.
What export packaging is used to prevent maritime transit corrosion?
For black hot-rolled round bars, material is bundled with high-tensile steel straps and fitted with reinforced lifting loops for crane handling. Cold-drawn, turned, or peeled bars receive rust-preventative oil coatings, protective plastic end-sleeves, and multi-layer waterproof VCI (Vapor Corrosion Inhibitor) wrapping. Bundles can also be packed in steel-banded wooden crates to prevent surface damage during long ocean transits.
What typical lead times apply for full container and break-bulk orders?
Standard diameter round bars in common carbon grades (Q235B, Q355B, SAE1045) are maintained in year-round stock for dispatch to Tianjin Port within 7 to 10 days of order confirmation. Custom alloy compositions, special heat treatments (Quenched & Tempered), or specific cut-to-length and threading operations generally run on a 20- to 30-day manufacturing cycle.
Complete Portfolio
Associated Heavy Building Materials & Piping Supply
Complementary structural products available for consolidated procurement, shipped directly through Tianjin Port.
Carbon Steel Coils (HR & CR)
Hot rolled coils for structural pipe conversion, alongside bright cold-rolled strip engineered for precise stamping.
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Prepainted Galvanized Coil
Continuous double-coated PPGI/PPGL coils in custom RAL formulations for industrial roofing panels and exterior siding.
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DX51D–DX54D Galvanized Coil
High-adhesion spangled and zero-spangle zinc coatings engineered to withstand roll forming without micro-flaking.
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Galvanized Scaffolding Pipe
Rigid ERW round structural tubing meeting international safety tolerances for heavy structural shoring frameworks.
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Coated Fluid Transmission Pipe
Epoxy and 3PE-lined welded line pipes engineered for high-pressure municipal water conduits and utility transport.
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Industrial Flow Valves
Heavy-duty gate, butterfly, globe, and check valves matched directly to our steel pipeline configurations.
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Thick Galvanized Flat Bar
Heavy-gauge flat steel (3–60 mm thickness) for lightning protection earthing strips and outdoor brackets.
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Interlocking Sheet Piles
U and Z profile cold-formed sheet piles for deep earth retention systems, cofferdams, and riverbank retaining walls.
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Direct Factory Inquiries
Request Your Customized Round Bar & Profile Quote
Submit your target diameters, steel grades, custom length requirements, and port of destination. Our international export team will provide a transparent CIF/FOB quote with current mill roll schedules within 24 hours.