Carbon Steel Bars for Construction - Mill Direct Supplier

Zhonghe Building Materials Co., Ltd.

Verified Custom manufacturer · 3 yrs ·

China

Carbon steel bars for construction projects

Customizable Rock-bottom price

$512 1-49 ton Base price

$489 50-99 ton 4.5% off

$478 ≥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$ 512.00

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 Carbon Steel Bars for Construction Projects

Property	Parameter	Description
Product Name	Carbon Steel Bars for Construction Projects	Structural carbon steel bars used in civil and building construction applications
Material Grade	ASTM A615 Gr.40/60, S235JR, Q235B, HRB400	International equivalents: BS4449 B500B, JIS SD345, EN 10025 S275JR
Standard Compliance	ASTM A615 / A706, EN 10025, GB/T 1499.2, JIS G3112	Meets international structural and reinforcement bar standards
Chemical Composition – C	≤ 0.30%	Carbon content controls hardness and weldability of the bar
Chemical Composition – Mn	0.60% – 1.50%	Manganese enhances tensile strength and toughness
Chemical Composition – Si	≤ 0.55%	Silicon acts as a deoxidizer and improves strength
Chemical Composition – P / S	P ≤ 0.045%, S ≤ 0.045%	Low phosphorus and sulfur content ensures ductility and weld quality
Tensile Strength	500 – 700 MPa (ASTM A615 Gr.60: ≥ 620 MPa)	Per ASTM A615 / EN 10025; ensures structural load-bearing capacity
Yield Strength	235 – 500 MPa (Gr.60: ≥ 420 MPa)	Minimum yield per grade; critical for seismic and static structural design
Elongation	≥ 14% – 20% (gauge length 5d)	Ensures ductile behavior under dynamic and seismic loading conditions
Size Range – Diameter	6 mm – 50 mm	Round, deformed (rebar), and square bar profiles available
Length	6 m – 12 m (custom lengths available)	Standard mill lengths; cut-to-length service upon request
Surface Finish	Black (mill scale), deformed rib pattern, or smooth	Deformed surface improves concrete bond strength in reinforced structures
Application	Reinforced concrete structures, foundations, bridges, columns, beams	Widely used in residential, commercial, and infrastructure construction
Certification	ISO 9001, CE Marking, Mill Test Certificate (EN 10204 3.1)	Third-party inspection available; SGS, BV, TÜV upon request
Packaging	Bundled in 2–5 MT bundles, steel-strapped, with ID tags	Seaworthy export packaging available; bare or wrapped per buyer requirement
MOQ	25 MT per order	Mixed grades and sizes accepted; OEM and project-based supply supported

Carbon Steel Bars for Construction - Mill Direct Supplier

Carbon steel bars for construction projects serve as the structural backbone of modern infrastructure, delivering the load-bearing reliability that engineers and contractors demand across residential, commercial, and civil engineering applications. As a mill-direct supplier, we provide premium-grade carbon steel bars that meet the most rigorous international standards, including ASTM A615, BS 4449, and GB/T 1499. Whether you are reinforcing concrete foundations, erecting high-rise frameworks, or constructing bridge decks, our carbon steel bars offer the mechanical consistency and dimensional accuracy your project requires. With decades of manufacturing experience and a vertically integrated production chain, we eliminate intermediary markups, passing genuine cost savings directly to buyers. Our bars are available in a comprehensive range of diameters, grades, and lengths, ensuring seamless compatibility with diverse construction specifications. Bulk orders are fulfilled with reliable lead times, backed by full material traceability documentation and third-party inspection support.

What are Carbon Steel Bars for Construction Projects?

Carbon steel bars for construction are hot-rolled or cold-drawn steel products manufactured from carbon-manganese alloys, primarily used to reinforce concrete structures and fabricate structural frameworks. Classified by carbon content — low (≤0.25%), medium (0.26–0.60%), and high (0.61–1.50%) — these bars deliver tensile strengths ranging from 400 MPa to over 600 MPa, making them indispensable load-bearing elements in virtually every category of civil construction.

Carbon steel bars for construction projects supplier

Carbon Steel Bars for Construction Manufacturing Process

Production begins with high-purity billets melted in electric arc or basic oxygen furnaces, then continuously cast and rolled through calibrated hot-rolling mills. The rolling process refines the grain structure, achieving a minimum yield strength of 420 MPa per ASTM A615 Grade 60 standards. Deformed bar profiles are formed during the final rolling pass, ensuring superior mechanical bond strength with concrete. Each coil or straight bar undergoes controlled cooling to optimize ductility and weldability.

Carbon Steel Bars Technical Specifications

Our construction-grade carbon steel bars are available in diameters from 6 mm to 50 mm and standard lengths of 6 m, 9 m, and 12 m. Key mechanical properties include a minimum tensile strength of 620 MPa, yield strength of 420 MPa, and elongation at break of ≥9% per ASTM A615 Grade 60. Carbon content is maintained at 0.30%–0.43%, with manganese at 0.60%–1.20%, producing a density of 7.85 g/cm³ at 20°C. Surface finish options include plain round and deformed ribbed profiles.

Carbon steel bars for construction projects manufacturer

Get a Competitive Quote for Carbon Steel Bars for Construction

Ready to source premium carbon steel bars for construction at mill-direct rates? Our team provides tailored solutions for projects of every scale, from small residential builds to large-scale infrastructure developments. Submit your specifications today and receive a detailed, obligation-free quote 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!

Carbon steel bars for construction projects wholesale

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Kevin H.

United States

2025-02-01

Initial shipment had a labelling mix-up — resolved promptly

We ordered 35 tonnes of 6 mm and 10 mm carbon steel bars in 6 m lengths for light structural fabrication work. When the shipment arrived, roughly 15% of the bundles were labelled with the wrong diameter designation, creating confusion on our shop floor during sorting. We flagged this to the supplier immediately. Their team responded within four hours, provided corrected documentation, and offered a partial credit for our sorting time. The steel itself was fully within spec — tensile strength and carbon content both verified correctly. Issue was administrative, not metallurgical, and their response was professional. Would consider ordering again.

James R.

Australia

2025-02-22

Competitive pricing for Grade 60 rebar, delivery met expectations

Ordered 50 tonnes of 25 mm and 32 mm plain round and deformed bars to ASTM A615 for a civil drainage infrastructure project in Queensland. Pricing came in 9% below our previous supplier for equivalent spec. Mechanical properties were verified by our independent lab — yield at 422 MPa, tensile at 621 MPa, density confirmed at 7.85 g/cm³. Delivery took 24 days to port, which was within the quoted window but on the longer end. Packaging held up well through sea freight. For Australian buyers, factor in lead time carefully, but the cost saving justifies it on larger volumes.

Sarah M.

United Kingdom

2025-03-16

Strong value on bulk rebar, minor admin delay at start

We purchased 75 tonnes of 16 mm and 20 mm ASTM A615 Grade 60 deformed bars for a social housing development. The per-tonne price was noticeably competitive versus local stockholders, and material quality — tensile strength 632 MPa, elongation 10% — was fully compliant. Only minor issue was a three-day delay getting the pro-forma invoice confirmed due to a bank holiday at their end, which pushed our order placement back slightly. Once documentation was sorted, production and shipping moved quickly. Overall good value and we would order again for the next phase.

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.