Steel Round Bars for Construction - Mill Direct Supplier

Zhonghe Building Materials Co., Ltd.

Verified Custom manufacturer · 3 yrs ·

China

Customizable Rock-bottom price

$545 1-49 ton Base price

$521 50-99 ton 4.4% off

$509 ≥100 ton 6.6% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 545.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Steel Round Bars for Construction

Property	Parameter	Description
Product Name	Steel Round Bars for Construction	Hot-rolled or cold-drawn solid circular steel bars used in structural and civil engineering applications
Material Grade	ASTM A36 / S235JR / SS400 / Q235B / HRB400	International equivalent grades: EN 1.0038 (S235JR), JIS G3101 SS400, GB/T 700 Q235B, GB/T 1499 HRB400
Standard Compliance	ASTM A36, EN 10025-2, JIS G3101, GB/T 700, GB/T 1499	Meets international structural steel and reinforcing bar standards for construction use
Chemical Composition (C)	≤ 0.26% (A36) / ≤ 0.17% (S235JR)	Carbon content controls hardness and weldability of the bar
Chemical Composition (Mn)	≤ 1.60% (A36) / ≤ 1.40% (S235JR)	Manganese enhances tensile strength and hardenability
Chemical Composition (P & S)	P ≤ 0.04%, S ≤ 0.05%	Low phosphorus and sulfur content ensures improved toughness and weldability
Chemical Composition (Si)	≤ 0.40%	Silicon acts as a deoxidizer and improves strength
Tensile Strength	400–550 MPa (A36: 400–550 MPa; S235JR: 360–510 MPa)	Per ASTM A36 and EN 10025-2; ensures structural load-bearing capacity
Yield Strength	≥ 235 MPa (S235JR) / ≥ 250 MPa (A36)	Minimum yield point as specified in respective standards for structural integrity
Elongation	≥ 20% (A36) / ≥ 26% (S235JR)	Measured on gauge length of 200 mm (A36) or 80 mm (EN); indicates ductility
Diameter Range	6 mm – 300 mm	Common construction sizes: Ø6, Ø8, Ø10, Ø12, Ø16, Ø20, Ø25, Ø32, Ø40, Ø50 mm and above
Length	3 m – 12 m (standard) / custom cut-to-length available	Standard mill lengths; random or fixed lengths per customer requirement
Surface Finish	Hot-rolled (black), pickled & oiled, cold-drawn bright, or galvanized	Surface condition selected based on application environment and corrosion protection needs
Application	Structural frameworks, concrete reinforcement, columns, beams, anchor bolts, machinery bases	Widely used in building construction, bridges, infrastructure, and industrial fabrication
Certification	ISO 9001, CE Marking, Mill Test Certificate (EN 10204 3.1/3.2), BV, SGS	Third-party inspection and material traceability documentation available upon request
Packaging	Bundled in hexagonal or square bundles, 1–3 MT per bundle; wrapped with steel strapping	Seaworthy export packaging available; wooden dunnage and waterproof wrapping for ocean freight
MOQ	5 Metric Tons per grade/size	Mixed grades and sizes accepted for full container load (FCL) orders; sample orders negotiable

Steel Round Bars for Construction - Mill Direct Supplier

Steel round bars for construction serve as one of the most fundamental structural materials in modern civil and industrial engineering projects worldwide. From reinforced concrete frameworks and bridge supports to machinery bases and pile foundations, these solid cylindrical steel products deliver the mechanical reliability that demanding construction environments require. As a mill direct supplier, we offer construction-grade round bars manufactured to international standards including ASTM A36, BS EN 10025, and GB/T 700, covering diameters ranging from 6 mm to 300 mm. Our products maintain a tensile strength of 400–550 MPa and a yield strength of 250 MPa minimum, ensuring structural integrity under heavy load conditions. Whether your project demands carbon steel, alloy steel, or low-alloy high-strength variants, our extensive inventory and flexible production schedules allow us to fulfill orders of virtually any specification. Sourcing directly from the mill eliminates intermediary markups, giving buyers access to cost-effective pricing without compromising on material quality or dimensional accuracy.

What are Steel Round Bars for Construction?

Steel round bars for construction are solid, cylindrical steel sections produced through hot rolling or cold drawing processes, designed specifically to meet the load-bearing and fabrication demands of structural applications. Available in carbon steel grades such as S235, S275, S355, and A36, these bars exhibit a density of approximately 7.85 g/cm³ and serve critical roles in reinforcement, anchoring, shaft manufacturing, and structural framing across residential, commercial, and infrastructure projects.

Steel round bars for construction supplier

Steel Round Bars for Construction Manufacturing Process

Production begins with continuous casting of steel billets, which are subsequently reheated to approximately 1,200°C and passed through a series of rolling mills to achieve the target diameter and surface finish. Hot-rolled bars undergo controlled cooling to optimize grain structure and mechanical properties, while cold-drawn variants are further processed through dies to achieve tighter dimensional tolerances of ±0.1 mm and improved surface smoothness. Final products are straightened, cut to length, and bundled for shipment.

Steel Round Bars for Construction Technical Specifications

Our construction round bars are supplied across the following standard parameters to match diverse project requirements:

Steel round bars for construction manufacturer

Grades: ASTM A36, S235JR, S355J2, Q235B, Q345B
Diameter Range: 6 mm – 300 mm
Length: 3 m – 12 m (custom lengths available)
Tensile Strength: 400–550 MPa
Yield Strength: ≥ 250 MPa (A36) / ≥ 355 MPa (S355)
Elongation: ≥ 20% (A36 per ASTM A6)
Surface Finish: Hot rolled, black, or pickled and oiled
Standards: ASTM A36/A108, EN 10025, GB/T 700, JIS G3101

All batches are accompanied by mill test certificates (MTC) verifying chemical composition and mechanical test results, ensuring full traceability from melt to delivery.

Steel round bars for construction wholesale

Get a Competitive Quote for Steel Round Bars for Construction

Ready to source premium-grade steel round bars for construction at mill-direct rates? Our experienced team is standing by to match your project specifications with the most suitable grade, dimension, and delivery schedule. Submit your inquiry today and receive a detailed quotation within 24 hours.

24/7 customer support available
Free samples for quality evaluation
Competitive pricing for bulk orders
Professional technical consultation

Contact us today to get your free quote within 24 hours!

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Brian C.

United States

2025-01-28

Initial diameter variance flagged — supplier resolved it professionally

On our first order of 10 tonnes of hot-rolled round bars in 90 mm diameter to ASTM A36, our incoming inspection found that roughly 5% of bars measured 89.3 mm — just outside our acceptable tolerance window. We raised the issue immediately. The supplier's technical team responded within 24 hours, acknowledged the variance, and arranged a partial replacement shipment at no additional freight cost within 12 days. MTC data for the replacement batch was clean. Communication throughout was professional. We have since placed a second, larger order and quality has been fully satisfactory.

Aisha N.

UAE

2025-02-19

Competitive mill pricing, solid product — logistics coordination could improve

We purchased 50 tonnes of S355J2 round bars, diameters 75 mm to 150 mm, for infrastructure framing on a development project in Abu Dhabi. Material tested to yield strength of 368 MPa and all EN 10025 parameters were met. The mill-direct pricing gave us roughly 12% savings versus our previous supplier. Shipping coordination to Jebel Ali required a few extra follow-up calls to confirm vessel booking. Material arrived in 28 days — acceptable but slightly longer than quoted. Overall a worthwhile supplier relationship with room to sharpen logistics communication.

Kevin O.

Australia

2025-03-13

Good value on A36 stock, minor documentation delay

Ordered 25 tonnes of ASTM A36 round bars in 60 mm and 80 mm diameters for anchoring applications on a commercial project in Brisbane. Material quality was solid — tensile strength at 430 MPa, well within specification. Mill certificates arrived two days after the shipment notification rather than simultaneously, which caused a brief hold-up on our end. The team resolved it quickly once flagged. Pricing was noticeably better than our local distributor for this volume. Would order again with the expectation that documentation timing improves.

Know your supplier

Zhonghe Building Materials Co., Ltd.

3 yrs on Sinoali.com

Located in China

Company information More goods

FAQ

Q: What grades of rebar do you supply?

A:We mainly supply HRB400, HRB500, A615 Grade 60, B500B and other high-strength deformed steel bars.

Q: What diameters are available for your rebar?

Q: Can you provide mill test certificates (MTC) for rebar?

Q: Do you accept customized lengths for rebar?

Q: Can you supply deformed steel bars for concrete reinforcement?

Q: What packaging is used for steel rebar?

Product display

Zhonghe Building Materials Co., Ltd. is a professional industrial manufacturer and supplier focusing on high-quality building materials. We specialize in a full range of steel building materials, covering reinforcing steel bars, galvanized steel products, corrugated steel sheets, structural steel pipes and other related metal construction materials.

Equipped with advanced production lines and precision testing equipment, the company implements strict full-process quality control and holds authoritative industry qualification certificates. We maintain sufficient spot inventory, adopt standardized export packaging, and ensure stable delivery cycles to meet global customer demands.

Our products are widely applied in construction engineering, machinery manufacturing, shipbuilding, energy and infrastructure projects. Adhering to the principle of quality first and customer-oriented service, we are committed to providing reliable building material solutions and long-term stable cooperation for global clients.