Direct-from-Mill Hot Rolled Flat Bars & Structural Profiles
Access high-demand flat bars, profiles, and structural products ready for immediate global shipment. All products undergo rigorous chemical and mechanical verification with complete Mill Test Certificates (MTC).
The Definitive Global Sourcing Guide for Hot Rolled Flat Bars
Understanding metallurgical consistency, international standard alignment, dimensional tolerances, and direct Chinese mill cluster dynamics to eliminate supply risk and unlock true landed cost reduction.
Transparent Mill Pricing
Global buyers consistently encounter bloated trader markups. At HZXY, our flat bar pricing structure leverages real-time billet costs directly from the Tangshan and Tianjin steel basins, passing direct mill economies of scale down to procurement teams.
MTC & Regulatory Guarantee
Zero ambiguity in project specifications. Every hot rolled flat bar bundle ships with complete EN 10204 Type 3.1 certification detailing heat number, carbon equivalent value (CEV), tensile yield strength, elongation, and Charpy impact values.
Value-Added Finishing
Raw mill bars require extensive downstream processing on site. Our in-house integrated facilities perform high-speed precision saw-cutting, automated punching, deburring, pickling, and hot-dip galvanizing, cutting on-site installation labor costs by up to 35%.
2026/2027 Hot Rolled Flat Bar Indicative Pricelist & Volume Discount Matrix
Procurement transparency is paramount. The table below outlines our standard dimensional matrix, weight specifications, benchmark FOB Tianjin pricing ranges, and multi-tiered container volume discounts.
| Thickness × Width (mm) | Common Standard & Grade | Theoretical Weight (kg/m) | FOB Tianjin Indicative ($/MT) | Volume Discount Tier | Inventory Status |
|---|---|---|---|---|---|
| 3.0 × 20 mm – 3.0 × 50 mm | Q235B / ASTM A36 / S235JR | 0.471 – 1.178 kg/m | $495 – $535 | 50MT+ (-3%) | 200MT+ (-6%) | Year-Round Stock |
| 4.0 × 25 mm – 4.0 × 100 mm | Q235B / Q355B / SS400 | 0.785 – 3.140 kg/m | $485 – $525 | 50MT+ (-3.5%) | 300MT+ (-7%) | Year-Round Stock |
| 5.0 × 30 mm – 5.0 × 150 mm | ASTM A36 / EN S355JR | 1.178 – 5.888 kg/m | $480 – $515 | 100MT+ (-4%) | 500MT+ (-8%) | Immediate Loading |
| 6.0 × 40 mm – 6.0 × 200 mm | Q355B / ASTM A572 Gr.50 | 1.884 – 9.420 kg/m | $475 – $510 | 100MT+ (-4%) | 500MT+ (-8.5%) | Immediate Loading |
| 8.0 × 50 mm – 8.0 × 250 mm | Q235B / Q355B / S235JR | 3.140 – 15.700 kg/m | $470 – $505 | 100MT+ (-4.5%) | Bulk Vessel (-9%) | Year-Round Stock |
| 10.0 × 60 mm – 12.0 × 300 mm | ASTM A36 / Q355B / SM490 | 4.710 – 28.260 kg/m | $465 – $495 | 200MT+ (-5%) | Bulk Vessel (-9.5%) | Direct Rolling 7 Days |
| 16.0 × 80 mm – 25.0 × 300 mm | EN S355JR / Q355B Heavy | 10.048 – 58.875 kg/m | $475 – $515 | Custom Rolling Schedule | Rolling Cycles Weekly |
| Hot-Dip Galvanized Flat Bar (Any) | ISO 1461 / ASTM A123 Coating | Base Bar + 80-120 μm Zn | Base Price + $110 – $145/MT | Contract Volume Rebates | In-House HDG Lines |
Standard Harmonization & Metallurgical Composition
Procurement engineers face severe risks when local standards diverge from Chinese national standards. Here is the verified metallurgical cross-reference for our structural hot rolled flat bars.
| Chinese Standard | US Equivalent (ASTM) | European (EN 10025) | Japanese (JIS) | Min. Yield Strength (ReH) | Tensile Strength (Rm) | Elongation (A5 %) |
|---|---|---|---|---|---|---|
| GB/T 700 Q235B | ASTM A36 | EN 10025-2 S235JR | JIS G3101 SS400 | ≥ 235 MPa | 370 – 500 MPa | ≥ 26% |
| GB/T 1591 Q355B | ASTM A572 Gr.50 | EN 10025-2 S355JR | JIS G3106 SM490A | ≥ 355 MPa | 470 – 630 MPa | ≥ 22% |
| GB/T 1591 Q355D | ASTM A572 Gr.50 (Low Temp) | EN 10025-2 S355J2 (-20°C) | JIS G3106 SM490B | ≥ 355 MPa | 470 – 630 MPa | ≥ 22% (≥27J @ -20°C) |
| GB/T 699 45# Steel | AISI / SAE 1045 | EN 10083-2 C45 | JIS G4051 S45C | ≥ 355 MPa | ≥ 600 MPa | ≥ 16% |
Dimensional Calibration
Rolled to strict EN 10058 and ASTM A6 / A6M tolerances. Width tolerances held strictly within ±0.75mm to ±1.5mm, thickness within ±0.3mm to ±0.6mm, completely eliminating edge waviness and camber.
Carbon Equivalent Control
Strict molten-ladle metallurgy maintains low Carbon Equivalent Value (CEV ≤ 0.38 for Q235B and ≤ 0.44 for Q355B). Guaranteed field weldability without preheating, mitigating hydrogen cracking risks.
Surface Decarburization
Utilizing modern stepping-beam reheating furnaces with automated atmosphere regulation prevents surface decarburization, ensuring high surface hardness and consistent torque retention for bolted assemblies.
Why Tianjin & Tangshan Lead Global Steel Export Logistics
Tianjin Huizhong Xinyu (HZXY) operates across 1,500 acres of dedicated production and storage bases in Daqiuzhuang, Jinghai District, Tianjin and neighboring Tangshan. Sourcing from our manufacturing nexus yields three distinct structural advantages:
Direct Integrated Cluster
Daqiuzhuang is globally recognized as the steel fabrication core of Northern China. Within a 25-kilometer radius, we coordinate hot blast billet suppliers, multi-stand continuous rolling mills, slitting factories, and modern hot-dip galvanizing lines, drastically shortening lead times.
Tianjin Port Proximity
Located just 60 km from Tianjin Xingang Port (the premier shipping hub in Northern China), our dedicated trucking fleets move containerized and break-bulk flat bar bundles directly to quayside within 90 minutes, eliminating internal freight premiums.
Mixed-Consignment Efficiency
Global buyers no longer need to manage 10 separate sub-contractors. We combine hot rolled flat bars with H-beams, channel steel, rebar, ERW steel pipes, and PVC conduits in unified customs clearance batches, reducing client administrative overhead by 40%.
Precision Fabrication: Delivered Job-Site Ready
Transforming standard mill flat bars into pre-engineered components ready for immediate assembly. Avoid high jobsite cutting waste and secondary manufacturing bottlenecks.
Precision Saw Cutting
High-speed band saws and circular cold sawing machines achieve clean, perpendicular, burr-free end cuts with precision tolerances within ±1.0mm.
CNC Punching & Drilling
Automated multi-axis CNC punching lines generate slotted holes, round anchor holes, and countersunk apertures aligned to structural drawings.
Hot-Dip Galvanizing
Molten zinc immersion lines operating strictly to ASTM A123, EN ISO 1461, and AS/NZS 4680 standards guarantee corrosion-free performance for 30+ years.
Bending & Pressing
Hydraulic CNC press brakes form custom angles, base clamps, brackets, and structural clips with high dimensional repeatability across thousands of units.
Mission-Critical Applications Worldwide
Hot rolled flat bars are fundamental building blocks in structural mechanics. Here is where international infrastructure and industrial sectors specify HZXY flat steel:
Pre-Engineered Building (PEB) Flanges & Stiffeners
Used continuously as column web stiffeners, truss connecting gusset plates, flange splice plates, and base plates in expansive industrial logistics centers.
Truck Trailer Chassis & Marine Stiffeners
High-yield Q355B / A572 Gr.50 flat bars serve as longitudinal trailer sub-frame members, side-rail coamings, and ship hull internal longitudinal stiffeners.
Substation Earthing & Industrial Gratings
Heavy galvanized 40×4mm and 50×5mm flat bars provide the backbone for high-voltage earthing grid networks and anti-slip forge-welded steel bar grating platforms.
The 5-Stage Zero-Risk Sourcing Protocol
How international purchasing directors, EPC contractors, and steel distributors conduct seamless sourcing with HZXY, from initial drawing review to port of discharge clearance.
Industry Trends: Decarbonization, CBAM Compliance, & Price Hedging
Understanding macro shifts in Chinese steel manufacturing, European Carbon Border Adjustment Mechanism (CBAM) regulations, and forward price volatility.
EAF Transition & Green Steel
Chinese flat bar rolling hubs are aggressively deploying Electric Arc Furnaces (EAF) utilizing high scrap steel ratios, cutting embodied carbon footprint per metric ton and aligning with global ESG standards.
CBAM & Carbon Accounting
For European buyers facing EU CBAM transition reporting, HZXY delivers standardized greenhouse gas (GHG) emission accounting data sets for scope 1 and scope 2 emissions, ensuring friction-free customs clearance in Rotterdam, Hamburg, and Antwerp.
Long-Term Contract Hedging
Mitigate raw material swings on major 12-month infrastructure contracts. We offer structured quarterly index-linked pricing and bonded warehouse allocation in Tianjin to insulate contractors from steel price spikes.
Supplied to Landmark Global Mega-Projects
Our steel materials are trusted across some of the most rigorous architectural and civil engineering projects in modern history, maintaining structural integrity across decades of service.
Qingdao Jiaozhou Bay Marine Bridge
Engineered high-corrosion resistant heavy flat bars and marine structural components tested to sustain aggressive high-salinity oceanic atmospheric exposure.
Beijing Daxing International Airport
Supplied certified precision-cut flat steel connecting joints, roof truss structural members, and high-specification utility valve arrays.
National Stadium (Bird's Nest)
Delivered custom high-tensile structural steel profiles, thick heavy-section flat bars, and specialized spatial truss components meeting zero-defect criteria.
Frequently Asked Questions for Overseas Procurement
Straight answers to common questions asked by corporate purchasing teams, structural estimators, and freight forwarders before issuing a purchase order.
How can HZXY offer discounted flat bar pricing compared to local distributors?
We operate directly inside Daqiuzhuang and Tangshan, the epicenter of Chinese steelmaking. By cutting out secondary brokers, maintaining an annual handling volume exceeding 10 million tons, and sourcing hot billets directly from adjacent blast furnaces, we eliminate 12% to 22% in domestic intermediary fees. These volume economies are passed directly to our overseas clients.
What mill test documentation accompanies flat bar shipments?
Every shipment is accompanied by a genuine Mill Test Certificate (MTC) conforming to EN 10204 Type 3.1. The MTC includes cast/heat number, chemical composition analysis (C, Si, Mn, P, S, Cr, Ni, Cu, CEV), and full mechanical testing results (Yield point, Ultimate Tensile Strength, Elongation percentage, and Charpy V-notch impact values).
What are your standard dimensional tolerances for hot rolled flat bars?
We adhere strictly to international tolerance standards including EN 10058, ASTM A6 / A6M, and GB/T 704. For widths up to 50mm, tolerance is held to ±0.75mm; for widths 50mm to 100mm, ±1.00mm; for widths >100mm, ±1.50mm. Thickness tolerances range from ±0.30mm (for ≤5mm thickness) to ±0.60mm (for >20mm thickness). Camber is controlled to ≤2.5mm per linear meter.
Can we consolidate flat bars with pipes, angles, coils, and valves in one container?
Yes. This is one of HZXY's hallmark core strengths. Rather than managing multiple mills, you can consolidate Hot Rolled Flat Bars with H-beams, channel steels, ERW/seamless pipes, deformed rebars, and even PVC drainage materials into a single 20ft or 40ft container load or break-bulk charter. This maximizes container volume, optimizes weight allowances, and drastically cuts shipping overhead.
What hot-dip galvanizing standards and coating thicknesses do you supply?
Our automated galvanizing lines operate to ASTM A123 / A123M, EN ISO 1461, and AS/NZS 4680. Standard zinc coating thickness ranges from 60 μm (approx. 430 g/m²) for light structural components up to 100 μm – 120 μm (approx. 700 – 850 g/m²) for aggressive coastal, underground, or chemical plant environments.
What are your payment terms and anti-corrosion ocean export packaging standards?
We support flexible international payment terms including Irrevocable Letters of Credit at sight (L/C at sight), Usance L/C, and standard T/T (30% deposit with balance against B/L and MTC copy). Packaging includes high-tensile steel banding straps (minimum 6 straps per 6-meter bundle), waterproof plastic wrapping, heavy moisture-absorbing desiccants, and heavy wooden dunnage support to prevent ocean transit damage.
Recommended Products for Consolidated Shipment
Bundle your hot rolled flat bar orders with complementary structural sections, coated coils, fluid pipelines, and industrial valves to maximize shipping container weight and slash logistics freight costs.
Industrial Pressure-Resistant Valves
Gate, butterfly, check, and ball valves matched to piping systems to complete multi-utility procurement packages with total pressure rating compatibility.
View SpecificationsLock In Factory-Direct Discount Flat Bar Quotations
Share your project bill of materials, required grade tolerances, and target delivery port. Our engineering export directors prepare binding CIF/FOB quotes, technical compliance submittals, and MTC samples within 1 business day.