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Material: Carbon Steel / Mild Steel | As-Rolled Black Square Bars
Inox Steel India is a reliable manufacturer, supplier, stockist, and exporter of Hot Rolled Square Bars, supplying high-quality mild steel and carbon steel square bars for construction, fabrication, infrastructure, and re-rolling applications. Hot rolled square bars are widely used where strength, weldability, and cost-effectiveness are more critical than tight dimensional tolerance or surface finish.
Hot rolled square bars are a fundamental long product in the steel industry and are commonly used across structural fabrication, frames, supports, base plates, brackets, and general engineering works. Their robust mechanical properties and ease of welding make them a preferred choice for heavy-duty and large-scale applications.
All hot rolled square bars supplied by Inox Steel India are manufactured in accordance with IS 2062, ASTM A36, ASTM A29, and EN 10025 standards, ensuring dependable performance and compatibility with construction and fabrication drawings.
A hot rolled square bar is a solid steel bar with a square cross-section, produced by rolling steel billets at high temperatures (above recrystallization temperature). This process allows steel to be shaped easily while developing strong internal grain structure.
Unlike cold-rolled or bright bars, hot rolled square bars:
These characteristics make hot rolled square bars ideal for applications where surface appearance is secondary to strength and economy.
Inox Steel India follows standard hot rolling practices to ensure consistent quality and supply.
Manufacturing Process Overview:
This process results in strong, weldable, and structurally reliable square bars suitable for fabrication and construction use.
Hot rolled square bars offer several practical benefits for industrial and construction applications:
These advantages make hot rolled square bars widely used in construction projects and heavy fabrication.
Inox Steel India supplies hot rolled square bars in commonly used construction and engineering grades:
🔹 Mild Steel Hot Rolled Square Bars
Used for general fabrication, frames, supports, and re-rolling purposes.
🔹 Carbon Steel Hot Rolled Square Bars
Used where slightly higher strength and load capacity are required in structural components.
MASTER TECHNICAL DATASHEET – HOT ROLLED SQUARE BARS
| Parameter | Hot Rolled Square Bars |
|---|---|
| Material Category | Carbon Steel / Mild Steel |
| Manufacturing Process | Hot Rolling |
| Surface Condition | Black / Mill Scale |
| Standard Specifications | IS 2062, ASTM A36, ASTM A29, EN 10025 |
| Common Grades | E250, E350, ASTM A36 |
| Carbon Content | Low to Medium |
| Density | 7.85 g/cm³ |
| Tensile Strength | 410 – 550 MPa |
| Yield Strength | ≥ 250 MPa |
| Elongation | ≥ 20 % |
| Hardness | Medium |
| Weldability | Excellent |
| Machinability | Fair |
| Heat Treatment | As Rolled |
| Dimensional Accuracy | Moderate |
| Surface Finish | Rough (Mill Finish) |
| Edge Condition | Rounded / Slightly Irregular |
| Size Range (Square) | 6 mm – 150 mm |
| Length | Random (3–6 m) / Cut Length |
| Straightness | As per rolling tolerance |
| Tolerance | IS / ASTM Standard |
| Testing | Chemical, Mechanical |
| Certification | EN 10204 3.1 |
| HSN / HS Code | 7214.99.90 |
| Typical Applications | Construction, Fabrication, Re-rolling |
Before selecting hot rolled square bars, buyers should consider:
Correct selection ensures structural safety, cost control, and ease of fabrication.
This section provides procurement-ready technical clarity for Hot Rolled Square Bars, covering standard sizes, weight calculation, indicative pricing in India, testing requirements, and application mapping for construction and fabrication use.
Inox Steel India supplies hot rolled square bars in standard market sizes as well as custom cut lengths for fabrication yards and construction projects.
Standard Square Bar Sizes (mm)
6 | 8 | 10 | 12 | 16 | 20 | 22 | 25 | 30 | 32 | 35 | 40 | 45 | 50 | 60 | 65 | 70 | 75 | 80 | 100 | 120 | 150
Length: Random (3–6 m) or fixed / cut lengths
Tolerance: As per IS 2062 / ASTM A36
Finish: Hot Rolled Black (Mill Scale)
Commonly demanded sizes include 20mm, 25mm, 40mm, 50mm, and 75mm hot rolled square bars for structural and fabrication applications.
The following square bar weight chart helps engineers and buyers estimate material requirements and cost.
(Density considered: 7.85 g/cm³)
| Square Size (mm) | Weight (kg/m) |
|---|---|
| 10 × 10 | 0.79 |
| 12 × 12 | 1.13 |
| 16 × 16 | 2.01 |
| 20 × 20 | 3.14 |
| 25 × 25 | 4.91 |
| 30 × 30 | 7.07 |
| 40 × 40 | 12.56 |
| 50 × 50 | 19.63 |
| 65 × 65 | 33.10 |
| 75 × 75 | 44.16 |
| 100 × 100 | 78.50 |
| 150 × 150 | 176.60 |
Addresses buyer searches such as:
steel square bar weight
deformed bar weight comparison
square tube vs square bar weight
Prices depend on size, grade, market steel rates, and quantity. Below is an indicative hot rolled square bar price per kg.
Indicative Price Range (INR/kg – India)
| Grade | Approx. Price / Kg (INR) | Typical Use |
|---|---|---|
| IS 2062 E250 | ₹ 52 – ₹ 68 | Fabrication, construction |
| IS 2062 E350 | ₹ 58 – ₹ 75 | Structural, load-bearing |
| ASTM A36 | ₹ 60 – ₹ 78 | Export & EPC projects |
Prices fluctuate with billet cost, rolling mill rates, and project volume.
HSN Code (India): 7214.99.90
HS Code (Export): 7214.99
Used for billing, GST, and export documentation.
Hot rolled square bars supplied by Inox Steel India undergo basic but essential testing to ensure compliance with construction standards.
Standard Tests Conducted:
Certification:
Hot rolled square bars are selected where strength and economy are more important than surface finish.
Contractors, fabricators, and EPC companies trust Inox Steel India for consistent supply, transparent pricing, and project readiness.
Key Advantages:
Our focus is on reliable structural steel with predictable performance for real-world construction and fabrication needs.
| Industry | Application |
|---|---|
| Construction & Infrastructure | Columns, supports, base frames |
| Fabrication & Engineering | Frames, brackets, platforms |
| Industrial Projects | Load-bearing structures |
| Re-Rolling Mills | Input material for further processing |
| Power & Utilities | Structural supports |
Hot rolled square bars are packed and dispatched to support bulk handling and site usage.
Packing Standards:
Domestic Supply: Mumbai, Pune, Ahmedabad, Surat, Chennai, Bengaluru
Export Markets: Middle East, Africa, Southeast Asia
If you are looking for cost-effective, structurally reliable hot rolled square bars, Inox Steel India offers competitive pricing, certified quality, and dependable supply for small and large projects.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
They are widely used in construction, fabrication, and structural applications.
They have a black mill-scale surface with moderate tolerance.
Yes, custom cut lengths are supplied as per requirement.
IS 2062 E250, E350, and ASTM A36.
Inox Steel India supplies hot rolled square bars in mild steel and carbon steel. Get sizes, weight chart, price per kg & certified stock.