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Mild Steel Bars for Construction - Mill Direct Supplier
China
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Mild Steel Bars for Building Construction
| Property | Parameter | Description |
|---|---|---|
| Product Name | Mild Steel Bars for Building Construction | Low carbon steel bars widely used in structural and reinforcement applications |
| Material Grade | S235JR / A36 / Q235B / SS400 | International equivalents: EN 10025 S235JR, ASTM A36, GB/T 700 Q235B, JIS G3101 SS400 |
| Standard Compliance | ASTM A36, EN 10025-2, GB/T 700, JIS G3101 | Meets major international structural steel standards for building and construction use |
| Carbon Content (C) | ≤ 0.25% | Low carbon content ensures good weldability and ductility |
| Manganese (Mn) | 0.60% – 1.65% | Enhances strength and hardness without reducing ductility |
| Phosphorus (P) | ≤ 0.040% | Controlled to prevent brittleness in finished bars |
| Sulfur (S) | ≤ 0.050% | Kept low to maintain toughness and weldability |
| Silicon (Si) | ≤ 0.40% | Acts as a deoxidizer during steel manufacturing |
| Tensile Strength | 400 – 550 MPa | Per ASTM A36 / EN 10025-2; ensures structural load-bearing capacity |
| Yield Strength | ≥ 235 MPa (S235JR) / ≥ 250 MPa (A36) | Minimum yield point suitable for general structural construction |
| Elongation | ≥ 20% (in 200 mm gauge length) | High elongation provides ductility and resistance to sudden fracture |
| Size Range | Diameter: 6 mm – 100 mm; Length: 6 m – 12 m | Available as round bars, square bars, and flat bars; custom lengths on request |
| Surface Finish | Hot Rolled, Black Surface / Pickled / Galvanized | Standard hot-rolled mill finish; surface treatment options available per order |
| Application | Structural frames, columns, beams, foundations, reinforcement | Suitable for residential, commercial, and industrial building construction projects |
| Certification | ISO 9001, Mill Test Certificate (EN 10204 3.1/3.2), CE Marking | Full material traceability with third-party inspection available upon request |
| Packaging | Bundled in 2–3 MT bundles, steel-strapped; seaworthy export packing available | Bundles labeled with grade, heat number, and dimensions for easy identification |
| MOQ | 5 Metric Tons per size/grade | Mixed container orders accepted; bulk pricing available for orders ≥ 25 MT |
Mild Steel Bars for Construction - Mill Direct Supplier
Mild steel bars for building construction represent one of the most fundamental structural materials relied upon by engineers, contractors, and developers worldwide. Characterized by a carbon content typically ranging from 0.05% to 0.25%, these bars deliver an optimal balance of ductility, weldability, and load-bearing capacity that makes them indispensable across residential, commercial, and infrastructure projects. From reinforcing concrete foundations and columns to framing structural frameworks, mild steel bars serve critical roles at every stage of the construction process. Their relatively low carbon composition not only ensures superior machinability and ease of fabrication but also keeps material costs predictable without sacrificing structural integrity. As a mill-direct supplier, we provide premium-grade mild steel bars that meet internationally recognized standards, offering consistent mechanical properties, precise dimensional tolerances, and reliable batch-to-batch quality that modern construction projects demand. Whether you require standard stock lengths or custom-cut sections, our supply chain is engineered to deliver on time and within budget.
What are Mild Steel Bars for Building Construction?
Mild steel bars for building construction are hot-rolled or cold-drawn carbon steel sections produced with a low carbon content of 0.05%–0.25% by weight. Available in round, square, flat, and deformed (ribbed) profiles, they are primarily embedded within concrete structures to provide tensile reinforcement or used as standalone structural members. Their inherent toughness, combined with a yield strength typically between 250 MPa and 350 MPa, makes them the go-to choice for reinforced concrete construction globally.
Mild Steel Bars for Building Construction Manufacturing Process
Production begins with the electric arc furnace (EAF) or basic oxygen furnace (BOF) melting of scrap steel or iron ore, followed by continuous casting into billets. These billets are reheated to approximately 1,200°C and passed through a series of rolling mills to achieve the desired cross-sectional profile and surface geometry. Deformed bars receive their characteristic ribs during the final rolling pass, enhancing the mechanical bond with concrete. Finished bars undergo controlled cooling and are cut to standard lengths of 6 m, 9 m, or 12 m before inspection and bundling.
Mild Steel Bars for Building Construction Technical Specifications
Our mild steel bars conform to ASTM A615, BS 4449, and GB/T 1499 standards, depending on project requirements. Key mechanical properties include a minimum yield strength of 300 MPa, ultimate tensile strength of 500–640 MPa, and elongation at break of ≥16%. The material density is 7.85 g/cm³ at 20°C, with a modulus of elasticity of 200 GPa. Available diameters range from 6 mm to 50 mm for round and deformed bars, while flat bars span widths of 20 mm to 200 mm with thicknesses of 3 mm to 30 mm. Carbon equivalent (CE) values are maintained at ≤0.43% to ensure excellent field weldability.
Get a Competitive Quote for Mild Steel Bars for Building Construction
Partner with a mill-direct supplier and eliminate unnecessary middlemen markups. We offer cost-effective pricing on bulk orders, fast lead times, and full material traceability backed by mill test certificates. Reach out to our technical team today and receive a tailored quotation aligned with your project specifications.
- 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!
