Solid Carbon Steel Square Bar (10mm - 250mm)
Hot rolled and cold drawn solid square bar engineered for structural forging, CNC machining, ornamental gates, and high-tensile fasteners.
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Engineered Steel Profiles & Precision Square Bar Inventory
Explore Tianjin Huizhong Xinyu's certified structural products. Direct rolling from Daqiuzhuang & Tangshan production bases with custom dimensional tolerances, high-integrity surface preparation, and international standard certification.
A36 / Q235B / Q355B Hot Rolled H-Beam
Heavy-gauge wide-flange structural members certified for infrastructure frameworks, multi-story buildings, and marine terminal trestles.
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Galvanized Structural Angle Bar (L-Profile)
Equal and unequal slotted angle steel with hot-dip zinc coatings compliant with EN ISO 1461 for transmission towers and trusses.
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Hot Rolled Structural Channel Steel (U/C)
Standard UPN and PFC channels engineered to sustain heavy lateral and compressive stresses in commercial framing systems.
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Q235B / Q345B Hot & Cold Rolled Coils
High-ductility carbon coils slit to exact client widths, optimized for tube production, automotive stampings, and roll forming.
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Hot-Dip Galvanized Flat Steel Bar (3-60mm)
Anti-corrosion grounding flat bars and machine mounting strips, offering long-term atmospheric resistance in harsh chemical zones.
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Industrial Galvanized Scaffolding & Line Pipe
Welded ERW tubular sections featuring strict outer diameter tolerances, calibrated hydrostatic tests, and zinc-coated finishes.
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High-Tensile Round Bar & Rebar Reinforcement
Precision calibrated solid round bars and deformed bars certified for civil infrastructure pile caps and rotating machine shafts.
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30-Year Metallurgical Heritage in China's Steel Epicenter
Tianjin Huizhong Xinyu International Trade Co., Ltd. (HZXY), founded in 1996, operates directly inside the premier industrial clusters of Daqiuzhuang (Tianjin) and Tangshan (Hebei). By integrating basic blast-furnace smelting, secondary refining, advanced automated rolling trains, deep cold-drawing, and sea-freight logistics, HZXY delivers unparalleled price competitiveness and structural traceability to more than 50 nations.
1996
Year Established
1,500+
Acres Industrial Base
10+
Million Tons Annual Cap
50+
Export Destinations
Transparent Procurement Matrix
China Steel Square Bar Price Index & Specification Pricelist
The pricing dynamics of China solid steel square bars (hot rolled, cold drawn, or forged) are governed by raw billet costs, alloying compositions, metallurgical reductions, and surface finishing treatments. Below is the updated benchmark procurement price guide from HZXY's Tianjin port departure facilities.
| Nominal Size (mm) | Common Equivalent Grades | Manufacturing Process | Dimensional Tolerance | Theoretical Wt (kg/m) | FOB Tianjin Port Ref Price (USD/MT) |
|---|---|---|---|---|---|
| 10 x 10 to 16 x 16 | Q235B / ASTM A36 / S235JR | Hot Rolled / Annealed | EN 10059 / Class B (±0.4mm) | 0.785 - 2.01 | $510 - $545 |
| 20 x 20 to 45 x 45 | Q355B / ASTM A572 Gr50 / S355JR | Hot Rolled Continuous Train | EN 10059 / Class A (±0.3mm) | 3.14 - 15.90 | $525 - $560 |
| 50 x 50 to 90 x 90 | Q235B / 1020 / 1045 Carbon | Hot Rolled / Precision Sized | ASTM A29 Standard (±0.6mm) | 19.63 - 63.59 | $535 - $580 |
| 100 x 100 to 150 x 150 | Q355B / S355J2 / 4140 Alloy | Heavy Bar Rolling / Normalizing | GB/T 702-2017 Group 2 | 78.50 - 176.63 | $560 - $610 |
| 160 x 160 to 250 x 250 | 42CrMo4 / SAE 4140 / S355 | Hydraulic Open-Die Forged | Forged Standard (±1.5mm) | 200.96 - 490.63 | $620 - $720 |
| 12 x 12 to 50 x 50 (Bright) | SAE 1018 / 1045 / C45E | Cold Drawn / Peeled (h9/h11) | ISO 286-2 Precision (±0.06mm) | 1.13 - 19.63 | $630 - $695 |
* Note: Prices reflect baseline spot quotes updated monthly on cash FOB Tianjin Port terms. Final project rates are calibrated against total tonnage, ultrasonic testing classes (EN 10228-3), specialized packaging (poly-weave bundling for ocean shipping), and zinc-plating requirements.
Procurement Engineering
Global Enterprise Procurement Requirements for Steel Square Bars
International engineering, procurement, and construction (EPC) conglomerates, heavy machinery manufacturers, and global steel stockists evaluate China steel square bars across sophisticated multi-dimensional matrices beyond face-value pricing.
Metallurgical Consistency & Segregation Control
Global original equipment manufacturers (OEMs) demand low sulfur (<0.015%) and phosphorus levels with stringent vacuum degassing (RH/VD). Minimizing center-line carbon segregation is vital for square bars utilized in forged components to prevent quench cracking during inductive heat treatment.
Corner Radius, Straightness & Twist Tolerances
Automated robotic fabrication requires rigorous dimensional limits. HZXY provides cold-drawn and precision-straightened square bars delivering straightness deviations within 1.0mm/meter, corner radii tightly restricted within DIN 1014 regulations, and controlled twist per axial meter.
Full Billet-to-Port Digital Traceability
Tenders in civil infrastructure demand uncompromised chain of custody. Every single bundle leaving HZXY's Tangshan and Tianjin production sites carries heat-number tagged barcodes linking directly to chemical analysis, elongation rates, Charpy V-notch impact values, and spectrometer records.
Cost Optimization via Consolidation
Sourcing disparate section steel items introduces freight inefficiency. HZXY solves this by enabling mixed container loading: matching solid square bars with H-beams, hollow sections, deformed rebar, and water pipelines within single bills of lading to cut port terminal and handling expenses.
Engineering Applications
Macro-Sector Industrial Solutions Powered by Solid Sections
Solid square steel bars provide critical resistance to multi-axial bending, torque stresses, and impact loads. HZXY supplies specialized grades configured for distinct downstream industrial verticals across global markets.
Civil Construction & Infrastructure
Applied extensively in bridge expansions, foundation tie rods, crane runway rails, and perimeter anti-ram barriers. Proven in landmark hubs such as Daxing International Airport and Jiaozhou Bay Bridge, our square bars provide unyielding structural yield boundaries under dynamic seismic loadings.
Heavy Machinery & Tooling Blocks
Medium carbon (AISI 1045) and alloy (4140/42CrMo4) square bars serve as primary preforms for industrial gears, guide rails, hydraulic cylinder mounts, and extrusion dies. High isotropic toughness prevents internal delamination during intensive multi-axis CNC surface milling.
Marine, Offshore & Energy Transmission
Hot-dip galvanized solid square bars deliver dependable sacrificial cathodic defense in marine splash zones. Ideal for mooring fittings, substation earthing rings, solar racking ground anchors, and offshore support grillage subjected to harsh marine atmospheres.
Next-Generation Metallurgy
Technology Roadmap: Green Steel & Automated Bar Rolling
The Chinese metallurgical sector is undergoing unprecedented systemic modernization. From electric arc furnace (EAF) transformation to intelligent high-speed sizing blocks, HZXY is aligning production with global decarbonization milestones.
EAF Scrap Recycling & Hydrogen Metallurgy
Transitioning from blast furnace-basic oxygen furnace (BF-BOF) routes to scrap-based Electric Arc Furnaces powered by renewable grids. This cuts Scope 1 and Scope 2 carbon emissions per metric ton from 2.1 t CO2 down to under 0.65 t CO2, satisfying European Carbon Border Adjustment Mechanism (CBAM) benchmarks.
High-Precision Automated Sizing Blocks
Integration of non-contact multi-axis laser measurement gauges across continuous bar mills. Real-time computerized feedback adjusts finishing roll gaps instantaneously, ensuring cross-sectional diagonal variations remain strictly within ±0.15mm along the entire 12-meter commercial bar span.
Micro-Alloyed High-Performance Chemistry
Deploying vanadium, niobium, and titanium (V-Nb-Ti) precipitation hardening regimes. This increases the minimum yield capacity of standard structural square bars without augmenting carbon equivalents (CEV), preserving superior weldability without mandatory pre-heating operations on building sites.
Global Market Dynamics
The International Steel Square Bar Commercial Landscape
Navigating global steel procurement requires a granular comprehension of regional cost disparities, currency impacts, and international trade compliance structures between China, ASEAN, Europe, and the Americas.
Raw Material Spreads & Coke Equilibrium
China's steel square bar costs are strongly anchored to Platts 62% Fe Iron Ore Index and domestic coking coal pricing in Hebei/Shanxi. The localized synergy within Tianjin and Tangshan clusters allows mills to absorb short-term cost spikes, safeguarding competitive export quotation validity for 14-30 days.
Regional Arbitrage & Supply Resilience
Western and Middle Eastern buyers frequently experience domestic delivery lead times exceeding 16 weeks from local mills. HZXY leverages massive stock buffers across 1,500 acres, fulfilling 500-ton orders with standard lengths within 7 to 10 days to maintain strict project critical paths.
Trade Policy & Tariff Optimization
Navigating Section 232, EU Safeguard quotas, and regional Anti-Dumping Duties (ADD) demands experienced export management. HZXY provides transparent Certificate of Origin documentation, non-preferential declarations, and compliant tariff classifications (HS Code 7214.99 / 7228.30) to smooth customs clearance.
Quality Governance & E-E-A-T
Localized Support, Mill Certifications & Compliance Assurance
Reliable international steel partnerships hinge on unquestioned testing credibility and rigorous multi-stage quality verification. HZXY upholds a zero-defect policy backed by internationally accredited inspection frameworks.
EN 10204 3.1 & 3.2 Certification
Every shipment is accompanied by complete original Mill Test Certificates (MTC) detailing melt chemistry, ladle sampling, mechanical tensile curves, yield thresholds, and notch toughness at 0°C or -20°C.
Third-Party Inspection Support
Full support for independent testing authorities including SGS, Bureau Veritas, Intertek, or TÜV. Inspections routinely verify dimensional callouts, surface condition, ultrasonic defect testing, and bundle tag consistency prior to container stuffing.
Port Proximity & Logistics Hub
Situated within Daqiuzhuang, our proximity to Tianjin Port allows rapid container cartage and break-bulk loading. Our specialized export packing involves heavy steel strapping, anti-rust oil immersion, and water-resistant protective wrapping.
Dedicated 24/7 Account Management
Every account is managed by dedicated bilingual engineers familiar with international Incoterms 2020 (FOB, CFR, CIF, DDP) and flexible LC / TT financial settlements, offering rapid updates from order placement to final port arrival.
Procurement Inquiries
Frequently Asked Questions: China Steel Square Bar Procurement
Essential technical, financial, and logistical insights compiled by HZXY's international trade specialists to assist procurement teams during technical evaluation and budget planning.
What primary factors drive the China steel square bar price per ton?
Prices are primarily governed by: (1) Billet metallurgy (e.g., standard low-carbon Q235B vs. low-alloy high-strength Q355B or alloyed 4140); (2) Production method (hot rolling carries lower processing costs than cold drawing or hydraulic forging); (3) Dimension scale (micro bars below 12mm or heavy sections above 150mm require specialized roll passes or forging setups); and (4) Secondary processing like bright peeling, thermal normalization, or hot-dip galvanizing.
How does China's Q235B / Q355B compare to ASTM and EN square bar standards?
Under GB/T 700 and GB/T 1591, Chinese grades align closely with global standards: Q235B is equivalent to ASTM A36 and European EN 10025-2 S235JR (minimum yield strength of 235 MPa). Q355B directly supersedes the older Q345B designation, aligning with ASTM A572 Grade 50 and EN S355JR (minimum yield strength of 355 MPa). HZXY provides official dual-certification MTC documentation indicating compliance with both domestic and international specifications.
What are the standard dimensional tolerances and available lengths?
Hot-rolled solid square bars are supplied under EN 10059 or ASTM A29 tolerances, generally ranging from ±0.3mm to ±1.2mm depending on the cross-section. Cold-drawn bright bars satisfy precision ISO h9, h10, or h11 standards. Standard mill stock lengths are 5.8m, 6.0m, 11.8m, or 12.0m to maximize 20ft and 40ft maritime shipping containers. Precision cut-to-length saw-cutting is available down to millimeter tolerances.
Can solid square bars be consolidated with other steel items in one shipment?
Yes. One of HZXY's key advantages is cargo consolidation. Buyers can combine steel square bars with hot-rolled H-beams, structural channels, angle irons, galvanized steel pipes, rebar, and even PVC piping in a single container or break-bulk order. This consolidation significantly cuts port customs clearance overhead and optimizes inland shipping logistics.
What anti-corrosion protection is recommended for long sea transits?
For bare hot-rolled bars, light mill scale offers basic protection, but we routinely apply rust-preventative mineral oils and wrap bundles in plastic lining combined with heavy woven outer coverings. For permanent extreme corrosion exposure, HZXY operates continuous in-house hot-dip galvanizing lines applying 350g/m² to 600g/m² (50-85 microns) of zinc according to ASTM A123 and EN ISO 1461 standards.
What are the standard order lead times and payment terms?
Standard inventory sizes (12mm to 100mm in Q235B/Q355B) typically ship within 7 to 10 business days from our Tianjin freight yard. Customized melt chemistry, unusual sizing, or cold-drawn specifications generally require 20 to 30 days. Standard international settlement options include Irrevocable Letters of Credit (L/C at sight) or Telegraphic Transfer (T/T), with credit terms evaluated for long-term contract partners.
Complete Procurement Catalog
Coordinated Industrial Profiles & Piping Supply Packages
Maximize your project's procurement efficiency by bundling certified steel square bars with complementary structural profiles, coils, and fluid conveyance systems directly from Tianjin Huizhong Xinyu.
Universal Structural Steel I-Beams (IPE / IPN)
Tapered and parallel flange I-beams engineered for horizontal span support, equipment skids, and industrial gantry tracks.
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High-Tensile Wire Rod & Cold-Heading Wire
Continuous carbon steel wire rod coils (5.5mm - 16mm) optimized for cold extrusion, nail manufacturing, and mesh weaving.
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Prepainted Galvanized Steel Coils (PPGI / PPGL)
Color-coated coils available across international RAL standards for roll-formed building envelopes and architectural facades.
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DX51D - DX54D Hot-Dip Galvanized Coils
Continuous spangle-controlled hot-dip galvanized steel strip engineered for HVAC ducting, structural studs, and automotive pressings.
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Industrial Anti-Corrosion Epoxy Coated Pipe
Fusion-bonded epoxy and 3LPE coated seamless/welded pipeline tubulars for municipal water transmission and hydrocarbon conveyance.
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High-Density PVC Water Supply & Drainage Pipes
Impact-modified thermoplastic pressure piping compliant with ISO 1452 standards for civil municipal water, sewer, and duct lines.
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Fire Protection Sprinkler & Gas Pipes
UL/FM recognized red painted and hot-dipped galvanized fire line pipes, threaded and grooved for reliable on-site connection.
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Industrial Gate, Butterfly & Check Valves
Cast iron and forged steel pressure valves engineered to integrate seamlessly with our complete pipeline supply packages.
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Fast Quotations & Technical Support
Request the Complete China Steel Square Bar Pricelist Today
Contact our engineering sales department directly with your material bill of materials, required steel grades, tolerances, and destination port to receive a comprehensive FOB/CIF quote within 24 business hours.