Direct supply from Daqiuzhuang Industrial Hub. Standard export-grade packaging with fixed-length saw cutting, custom bending, and certified anti-corrosion finishes.
Solid round section bar with high corrosion resistance, precision tolerance and smooth surface for anchor bolts and tooling.
Ribbed steel reinforcement bar suited for critical infrastructure foundations, water conservancy works, and heavy civil slabs.
Wide-flange beams for primary workshop framework, bridge girders, and commercial towers. Supplied cut-to-length.
Equal and unequal profile angles engineered for power transmission towers, racking frameworks, and brackets.
Anti-corrosion flat bar for outdoor substation grounding, earthing paths, structural stiffeners, and municipal handrails.
Precision-rolled carbon coils for automotive chassis stamping, cold roll-forming lines, and spiral pipe fabrication.
Zinc-protected round hollow sections for load-bearing falsework, agricultural greenhouses, and fire sprinkler conduits.
Heavy-duty butterfly, gate, check, and balancing valves configured precisely to fit MEP systems and industrial lines.
Comprehensive engineering analysis on metallurgical properties, dimensional accuracy, global industry transitions, and deep processing capabilities provided by premier Chinese manufacturing facilities.
The manufacturing cluster located in the Daqiuzhuang Industrial Zone, Jinghai District, Tianjin, alongside primary mills in Tangshan, forms the world's most concentrated steel industrial corridor. Operating with continuous electric arc furnaces (EAF) and state-of-the-art multi-stand continuous rolling mills, Chinese 25mm round bar manufacturers achieve an unparalleled cost-to-performance ratio. Scale economy enables low overhead, standardized billet sourcing, automated defect detection, and continuous hot-dip galvanizing lines directly integrated into the finishing process.
Modern steel procurement requires carbon-footprint accountability, traceability, and strict adherence to geometric tolerances. China's shift from legacy low-end output to high-grade, decarbonized micro-alloyed rounds has transformed the 25mm steel bar sector. Demand is increasingly pivoting toward high-yield grades (such as Q355B, 40Cr, 42CrMo, and SAE1045) that allow structural engineers to reduce overall deadweight in modular pre-engineered steel buildings, wind turbine anchorages, and offshore foundation grids.
At HZXY, every production batch of 25mm solid round bar undergoes rigorous testing protocols including ultrasonic non-destructive testing (NDT), metallurgical micro-structure analysis, tensile testing, and Charpy V-Notch impact testing at design temperatures. Full Mill Test Certificates (MTC) conforming to EN 10204 Type 3.1 are supplied as standard, complete with heat numbers, chemical composition heat-run charts, and surface roughness verification.
| Nominal Diameter | Material Grade | Equivalent Standards | Yield Strength (ReH) | Tensile Strength (Rm) | Common Finish / Processing |
|---|---|---|---|---|---|
| 25.0 mm (±0.15mm) | Q235B / Carbon Steel | ASTM A36, S235JR, SS400 | ≥ 235 MPa | 370 - 500 MPa | Black Hot Rolled, Cut-to-length, Threaded |
| 25.0 mm (±0.12mm) | Q355B / Low Alloy | ASTM A572 Gr.50, S355JR | ≥ 355 MPa | 470 - 630 MPa | Hot-Dip Galvanized (≥85μm), Chamfered |
| 25.0 mm (±0.08mm) | 45# / SAE1045 | EN 10083-2 C45, JIS S45C | ≥ 355 MPa | ≥ 600 MPa | Bright Cold Drawn, Quenched & Tempered |
| 25.0 mm (±0.05mm) | 42CrMo / 4140 | ASTM 4140, 42CrMo4 | ≥ 930 MPa | ≥ 1080 MPa | Precision Centerless Ground, Hard Chrome |
*Specifications indicate typical baseline values. Custom micro-alloying and bespoke dimensional tolerances (ISO h9, h11) are available upon request for machine turning and anchor threading.
How global infrastructure developers and equipment manufacturers utilize HZXY's precision 25mm solid bars in high-stress and critical environments.
Solid 25mm plain bars hot-dip galvanized for subterranean foundation cages, earth-retaining sheet-pile tie-backs, and anchor bolts providing exceptional shearing load resistance in marine civil infrastructure.
Low-carbon and medium-carbon 25mm cold-drawn solid bars supply precision machining lines for agricultural pins, hydraulic cylinder linkages, automotive drive shafts, and conveyor roller shafts.
Engineered foundations for photovoltaic ground mounting systems and onshore wind towers require heavy 25mm high-grade anchor rods capable of handling cyclically shifting wind loads over 25+ years.
Combined with our H-beam profiles and structural angle solutions, 25mm round bars act as lateral bracing struts and tension rods on long-span trusses, pedestrian overpasses, and rail viaducts.
Headquartered in Daqiuzhuang, Jinghai, Tianjin—the epicenter of China's steel manufacturing and processing cluster—integrated directly with our Tangshan production center.
Supply Chain Integrity & Export Verification: As an institutional supplier with 30 years of operational history, Tianjin Huizhong Xinyu (HZXY) resolves complex logistics challenges through port-adjacent consolidation at Tianjin Port. Our export department ensures full compliance with international credit instruments (Irrevocable L/C at sight, T/T), SGS / BV third-party pre-shipment inspections, bill-of-lading cargo matching, and comprehensive fumigated seaworthy bundling for break-bulk and container vessels.
Eliminate local workshop re-handling expenses. HZXY provides in-house precision processing customized directly to EPC project schedules and CAD shop drawings.
High-speed cold saw cutting units achieve tight length tolerances (±1.0mm) for 25mm round bars, leaving completely burr-free perpendicular end-faces ideal for automated threading, weld beveling, or direct installation.
Our environmentally compliant galvanizing kettle systems yield uniform zinc layer bonds exceeding 85 μm (610 g/m²) conforming to ASTM A123 / ISO 1461, ensuring over 50 years of anti-corrosion protection in high-salinity marine locations.
Fully automated CNC threading machinery produces metric, UNC, or BSW standard ends on 25mm solid bars. Cold and hot hydraulic press brake lines execute exact radius bends for foundation J-bolts, U-bolts, and tie anchors.
Critical answers addressing mill capabilities, shipping configurations, third-party inspection, and multi-product container consolidation.
Hot-rolled 25mm round bars are formed above recrystallization temperature, yielding high ductility, robust toughness, and a mill scale surface suitable for structural welding, construction fabrication, and hot-dip galvanizing. Cold-drawn 25mm bars undergo secondary drawing through a die at ambient temperature, producing superior surface smoothness, tighter dimensional tolerance (typically ISO h9/h11 vs. hot-rolled ±0.3mm), and significantly increased yield strength for precision turning and machining components.
HZXY is headquartered in the Daqiuzhuang Industrial Zone, Jinghai District, Tianjin, China, one of the world's most comprehensive steel manufacturing clusters, with secondary integrated production bases in Tangshan. Most overseas shipments are dispatched through Tianjin Port (Xingang), situated less than 80 kilometers from our primary processing yards. We also routinely coordinate shipments through Qingdao, Shanghai, and other major Chinese seaports based on ocean freight advantages.
Yes. A primary operational advantage of HZXY is our one-stop structural Bill-of-Materials procurement model. Overseas engineering teams and import stockists can consolidate 25mm round bars alongside H-beams, channel steels, deformed rebars, galvanized steel coils, welded pipes, PVC drainage materials, and industrial valves within single break-bulk holds or unified container loads, substantially lowering customs processing fees and freight charges.
All delivered steel products are accompanied by comprehensive Mill Test Certificates (MTC) conforming to EN 10204 3.1. Testing documentation includes ladle chemical analysis, yield and tensile strength, elongation, Charpy impact testing (where applicable), and coating thickness verification for galvanized lots. Buyers are fully empowered to appoint independent third-party inspection agencies such as SGS, BV, or Intertek for on-site container loading supervision and dimensional audits.
For standard stocked grades (such as Q235B and Q355B in 25mm diameter), lead times can be as prompt as 7 to 10 days for container loading. For bespoke alloying requirements, specific cut-to-length orders, or custom hot-dip galvanizing, lead times generally range between 20 to 30 days. MOQ for stock products starts at 5 to 10 metric tons, while dedicated custom rolling mill sequences generally require 25 metric tons.
Procurement directors and project engineers can request our full catalog directly by visiting our Request a Catalog page, browsing the hot-products portal, or contacting our multilingual international trade team via [email protected]. Detailed theoretical weight charts, chemical cross-reference matrices, and packing bundle specifications will be supplied immediately.
Ensure synchronized delivery of long sections, flat steels, and infrastructure pipeline materials alongside your 25mm round bar orders.
High-speed rolled wire coils for cold-heading, mesh welding, fasteners, nail production, and high-tensile spring wire drawing.
Solid rectangular steel profiles with sharp edges for machinery brackets, ornamental iron fabrication, and structural bracing.
Hot-rolled channel sections for purlins, equipment base frames, transport trailers, and building facade sub-structures.
Continuously zinc-coated coils with regular or zero spangle, formulated for roll-forming, HVAC air ducting, and purlin stamping.
Pre-painted galvanized steel coils finished in customized RAL shades for outdoor architectural corrugated roofing and siding.
High-frequency welded hollow round pipes for low-pressure fluid transport, piling casings, structural rollers, and bollards.
UPVC, HDPE, and PPR pressure pipes and fittings engineered for civil potable water conveyance, underground drainage, and conduit.
Hot-rolled and cold-drawn square steel bars for architectural fencing, machine grates, forging billets, and hardware accessories.
Receive direct mill pricing, guaranteed chemical certifications, and synchronized multi-product shipping directly from China's most trusted steel industrial cluster.
