Galvanized Plain Round Bar, High Corrosion Resistance
- Dia: 10mm - 350mm
- HDG / Plain
- Q235B / 45#
- Cut-to-Length
Immediate export availability across hot-rolled solid rounds, structural beams, cold-drawn wire, and high-tensile reinforcement stock with full metallurgical trace reports.
Decoding the procurement economics of round metal billets, cold-drawn shafting, and solid precision rounds across international manufacturing epicenters.
The term "discount" in industrial metallurgy often triggers apprehension regarding non-prime chem-sheet deviations or unverified heats. At Tianjin Huizhong Xinyu (HZXY), our discount pricing architecture is not derived from inferior secondary scrap melt. Instead, it is an algorithmic supply chain arbitrage generated by colossal batch production cycles (over 10 million metric tons per annum), continuous strand billet casting, and zero-intermediary direct allocation from Daqiuzhuang and Tangshan rolling mills.
As Western markets face elevated energy expenditures and tight carbon-border restrictions, raw domestic conversion costs for solid round bar (such as AISI 1045 or 4140 equivalents) in Europe and North America have climbed significantly. Sourcing bulk carbon and low-alloy solid round stock from Tianjin provides international tier-1 machine shops with a 25% to 38% landed net material cost advantage, even when incorporating intercontinental sea-freight, marine insurance, and inland drayage.
Industrial round stock metal performance relies heavily on surface decarbonization depth and geometric tolerances. HZXY provides three distinct grades: standard black hot-rolled round bars (DIN 1013), smooth peeled/turned bars free of surface seam cracks for precision forging, and cold-drawn/ground finish rounds (h9 to h11 tolerance) tailored for Swiss CNC lathe processing, hydraulic ram manufacturing, and linear guideway systems.
Solid round stock metals form the foundational skeleton for rotating drivetrains, structural tensioning, subsea exploration, and high-load civil infrastructures.
In midwestern US heavy assembly hubs, our Q355B and SAE 1045 medium carbon solid rounds serve as primary feedstock for cold-forged wheel spindles, planetary gear hubs, and universal joint yokes. Material consistency prevents micro-crack propagation during induction hardening processes, ensuring 55-60 HRC core-to-case integrity in automotive Tier-2 lines.
European offshore energy projects demand high-toughness steel capable of sub-zero Charpy V-notch impact performance at -40°C. S355JR and 42CrMo4 alloy round bars from our Tangshan base undergo strict vacuum degassing (VD) and argon stirring to minimize non-metallic inclusion content, yielding flawless studs, high-tensile pitch fasteners, and slewing ring gear teeth.
In coastal GCC processing installations, standard round metals corrode rapidly under extreme heat and saline exposure. HZXY provides thick-galvanized plain round bar (zinc coating mass ≥ 610 g/m² complying with ASTM A123) and high-chrome round sections used for deep-well sucker rods, pump shafts, and structural tension members in desalination substations.
Copper, gold, and iron beneficiation circuits require forged grinding balls and rods with severe wear endurance. HZXY supplies specialized high-carbon, high-manganese round steel bars (grades B2, B3, 65Mn) specifically rolled to resist spalling and ovality wear under crushing impact in tumbling wet-grinding mills.
For port expansions in Vietnam, Indonesia, and the Philippines, solid mild steel round bars act as marine tie-rods securing steel sheet pile bulkheads. HZXY manufactures upset-threaded bar ends and custom-forged eye-bolts with anti-corrosive bitumastic or epoxy marine coatings, providing decades of structural anchorage against tidal action.
Why procurement officers from over 50 nations rely on our Daqiuzhuang (Tianjin) and Tangshan industrial mega-facilities to hedge against global supply shocks.
Headquartered in Daqiuzhuang Industrial Zone—the globally recognized capital of steel pipe and section processing—HZXY operates within a tightly integrated 5-kilometer metallurgical perimeter. From blast furnace hot metal directly transferred to billet continuous casters, to automated tandem bar rolling mills and environmental hot-dip galvanizing baths, material moves without inter-city freight delays, trimming 12-18 days off standard production lead times.
Global supply chain volatility, container vessel blank sailings, and localized mill maintenance often destabilize downstream fabrication schedules. By maintaining over 150,000 tons of prime round bar, billets, structural angles, H-beams, and coils across our Tianjin and Tangshan yards at any moment, HZXY acts as a strategic shock absorber. Orders can be dispatched to Tianjin Port (Xingang) within 24 hours of clearance.
International freight optimization requires maximizing both volume and weight capacities in 20ft and 40ft maritime containers. With HZXY's wide manufacturing scope—covering solid round stock, welded pipe, PVC drainage conduits, structural channels, and flanged gate valves—overseas buyers can merge 6 different product classes into a single shipping dossier, saving thousands of dollars in baseline LCL and multi-vendor import customs fees.
Engineering compliance cross-reference aligned with ASTM, EN, GB, and JIS engineering codices for solid round bar procurement.
| China GB Standard | USA ASTM / AISI | European EN Standard | Japanese JIS | Min. Yield Strength (MPa) | Tensile Strength (MPa) | Core Application Domain |
|---|---|---|---|---|---|---|
| Q235B (GB/T 700) | ASTM A36 | EN 10025-2 S235JR | JIS G3101 SS400 | 235 | 370 - 500 | General fabrication, anchors, marine tie rods, base plates |
| Q355B (GB/T 1591-2018) | ASTM A572 Gr. 50 | EN 10025-2 S355JR | JIS G3106 SM490 | 355 | 470 - 630 | Heavy cranes, bridge pins, high-stress load shafts |
| 45# Carbon (GB/T 699) | AISI 1045 | EN 10083-2 C45E | JIS G4051 S45C | 355 (Normalized) | > 600 | Machined shafts, gears, automotive axles, hydraulic rods |
| 40Cr Alloy (GB/T 3077) | AISI 5140 | EN 10083-3 41Cr4 | JIS G4053 SCr440 | 785 (Q&T) | > 980 | Quenched & tempered high-torque transmission gears, steering spindles |
| 42CrMo (GB/T 3077) | AISI 4140 | EN 10083-3 42CrMo4 | JIS G4053 SCM440 | 930 (Q&T) | > 1080 | Oil downhole drill collars, turbine bolts, high-pressure valves |
| HRB400 / HRB500 | ASTM A615 Gr. 60 | BS 4449 Grade B500B | JIS G3112 SD390 | 400 / 500 | > 540 / > 630 | Earthquake-resistant civil foundation rebar cages |
Pioneering decarbonized green metallurgy, automated non-destructive evaluation, and ultra-high-speed cold finishing systems.
To align with global CBAM (Carbon Border Adjustment Mechanism) compliance and ESG criteria, HZXY is scaling our supply of Electric Arc Furnace (EAF) scrap-melt round bars and hydrogen-injected direct reduced iron (DRI) heats. This transition curtails Scope 1 and Scope 2 carbon emissions per ton of hot-rolled round bar by up to 45%, qualifying our exports for European low-carbon infrastructure tenders.
Zero internal voiding is critical for rotating drive shafts. Our rolling lines feature automated multi-channel ultrasonic testing (UT) and rotating-probe eddy-current flaw detection running inline at 18 meters per second. This non-destructive protocol detects sub-surface micro-shrinkage cavities, inclusions, and longitudinal seam tears down to 0.1 mm, preventing tool damage during downstream CNC operations.
Our upcoming Tangshan cold-processing expansion integrates high-speed carbide peeling heads, two-roll rotary straightening, and centerless burnishing. This machinery delivers solid round stock with run-out straightness under 0.5 mm per meter and surface decarburization controlled within 0.5% of diameter, fulfilling aerospace sub-contracting and robotic harmonic drive requirements.
Institutional quality assurance frameworks engineered to pass European CE, American ASTM, and international surveyor verifications.
Every shipment of round stock metal, structural profile, or pipe leaves our Tianjin dock with a genuine Mill Test Certificate (MTC) stating exact electric furnace heat numbers, ladle chemistry (C, Si, Mn, P, S, Cr, Ni, Mo, V), and mechanical tensile/yield/elongation numbers. For critical public works, we facilitate independent EN 10204 3.2 inspection with SGS, Bureau Veritas, or TÜV Rheinland witnessing test coupons.
Ocean transit through humid equatorial sea lanes can degrade bare steel surfaces. HZXY employs multi-layer seaworthy protection: high-viscosity rust-inhibitive oil coatings, Volatile Corrosion Inhibitor (VCI) protective paper wrapping, heavy-gauge polywoven protective outer sleeves, and circumferential high-tensile steel straps with heavy-duty end caps to protect chamfered bar edges.
Overseas procurement teams require flexible fiscal frameworks. HZXY provides trade support under Incoterms 2020 (FOB Xingang, CIF, CFR, DDP), verified Letters of Credit (L/C at sight or Usance L/C), and structured milestone invoicing backed by Sinosure (China Export & Credit Insurance Corporation) to support long-cycle construction operations.
Proof of engineering precision across landmark bridges, international aviation hubs, and world-class sporting arenas.
Supplied high-toughness structural sections, specialized foundation rebar, and corrosion-resistant marine anchoring tie stock for one of the world's longest water-spanning trans-oceanic bridges.
Delivered thousands of tons of high-yield structural H-beams, heavy plate sections, and fire-protection fluid pipeline networks for the iconic starfish passenger terminal.
Supplied high-specification structural steel profiles, plates, and solid bar connectors meeting high anti-torsion criteria for the world's largest curved steel spatial matrix.
Expert insights compiled by our senior metallurgy engineers and trade directors to resolve procurement queries before booking mill runs.
Our discount pricing is built entirely on manufacturing efficiency, integrated raw material positioning, and cluster supply economics rather than compromises in metal quality. Operating in the heart of Daqiuzhuang and Tangshan—China's largest steel manufacturing base—our production bases produce and move millions of tons annually. We source hot pig iron directly from upstream blast furnaces without intermediate solidification and transport reheating cycles. Combined with our direct access to Tianjin Xingang seaport, deep logistics volume discounts, and highly optimized rolling lines, we pass raw conversion savings directly to overseas bulk buyers.
For standard black hot-rolled solid round bars (DIN 1013 / ASTM A29 Class A), tolerances range from ±0.4mm for diameters between 10-20mm, up to ±1.5mm for larger forging rounds between 100-200mm. For precision applications (machining, hydraulic shafts, precision pins), our cold-drawing and peeled/ground lines achieve tight tolerances conforming to ISO h9, h10, and h11. Surface roughness can be delivered below Ra 0.8µm upon request.
When pickling medium-carbon and alloy steels (e.g., 45# / 1045 or 42CrMo / 4140) prior to hot-dip galvanizing, nascent hydrogen atoms can diffuse into the metal crystal lattice, triggering catastrophic delayed cracking under stress. To eliminate this phenomenon, HZXY maintains strict hydrogen-relief baking protocols. High-tensile solid stock undergoes immediate thermal de-embrittlement treatment at 190°C–220°C for 4 to 8 hours post-acid pickling and pre-fluxing, fully protecting mechanical yield strength and shear durability.
Yes. This is one of HZXY's primary competitive strengths. A commercial contractor or distributor can combine 50 tons of solid round bar, 30 tons of H-beam profiles, 20 tons of galvanized scaffolding pipe, and 1 container of PVC drainage fittings and municipal valves into a consolidated purchase contract. We assemble, strap, and load the entire consignment in our Tianjin logistics freight yard, simplifying shipping, clearance documentation, and inland dispatch.
Each delivery is dispatched with an authentic Mill Test Certificate compliant with EN 10204 Type 3.1. The document records the heat number, chemical composition breakdown (spectrometer tested for carbon, manganese, phosphorus, sulfur, silicon, and trace alloys), mechanical characteristics (Yield, Tensile, Elongation, Reduction of Area, Hardness), and ultrasonic non-destructive testing verification. Buyers are welcome to appoint independent surveyors (SGS, BV, Lloyd's) to inspect materials at our factory prior to containerization.
For standard inventory sizes kept on hand in our Daqiuzhuang/Tangshan warehouses (e.g., Q235B, Q355B, 45# round bar from 12mm to 120mm diameter), the MOQ is 5 metric tons per size, with orders dispatching to the port within 3 to 7 working days. For custom alloying, special lengths, or dedicated rolling campaigns, our typical mill run MOQ is 20–25 tons per diameter, with standard lead times between 15 and 25 days depending on rolling schedules.
Expand your project supply scope with precision cold-drawn wire, industrial valves, pre-painted coil, and certified fluid conduits.
Connect with our senior bilingual steel export coordinators. Receive firm pricing, complete Mill Test Certificates, tolerance documentation, and shipping schedules within 24 hours.