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Grades: C20, C45, EN8 | Engineering & Structural Quality Square Bars
Inox Steel India is a trusted manufacturer, supplier, stockist, and exporter of carbon steel square bars in India, supplying C20, C45, and EN8 square bars to engineering, fabrication, construction, and heavy industrial sectors. Our carbon steel square bars are widely used across OEM manufacturing, machining workshops, forging units, infrastructure projects, and structural fabrication, where strength, reliability, and cost efficiency are essential.
Carbon steel square bars are one of the most commonly used solid steel products due to their balanced mechanical properties, ease of fabrication, and economical pricing compared to alloy and stainless steel alternatives. Their uniform square cross-section makes them suitable for load-bearing components, columns, frames, machine parts, and fabricated assemblies.
All carbon steel square bars supplied by Inox Steel India are manufactured in compliance with ASTM A29, IS standards, and EN 10083, ensuring consistent quality, predictable performance, and compatibility with industrial drawings and specifications.
A carbon steel square bar is a solid steel product with a square cross-section, manufactured from low to medium carbon steel grades. These bars are designed to provide good strength, machinability, and weldability for general engineering and structural use.
Square bars are widely preferred over round bars in applications where:
Because of their geometry, square bars distribute load evenly and offer higher resistance to twisting, making them ideal for columns, supports, machine frames, and base structures.
Inox Steel India follows controlled manufacturing processes to ensure carbon steel square bars meet dimensional and mechanical requirements for industrial use.
Manufacturing Process:
This process results in uniform strength, good surface finish, and reliable machinability, making carbon steel square bars suitable for both fabrication and precision engineering.
Carbon steel square bars offer several practical and economic advantages for industrial use:
These characteristics make carbon steel square bars a preferred choice in construction, fabrication, engineering workshops, and forging industries.
Inox Steel India supplies carbon steel square bars in multiple grades to suit different mechanical and fabrication needs:
🔹 C20 Carbon Steel Square Bars
Low carbon steel grade offering excellent weldability and formability. Commonly used in general fabrication, frames, and light structural work.
🔹 C45 Carbon Steel Square Bars
Medium carbon steel grade with higher strength and hardness, suitable for shafts, gears, bolts, and machine components.
🔹 EN8 Carbon Steel Square Bars
Widely used engineering steel offering good tensile strength and wear resistance, ideal for automotive and mechanical parts.
MASTER TECHNICAL DATASHEET – CARBON STEEL SQUARE BARS
| Parameter | C20 | C45 | EN8 |
|---|---|---|---|
| Material Category | Low Carbon Steel | Medium Carbon Steel | Medium Carbon Steel |
| Carbon Content (%) | 0.17 – 0.23 | 0.42 – 0.50 | 0.36 – 0.44 |
| Standard | IS / EN / ASTM | IS / EN / ASTM | EN 10083 |
| EN Equivalent | EN 10083 C22 | EN 10083 C45 | EN8 (080M40) |
| ASTM Equivalent | ASTM A29 1020 | ASTM A29 1045 | ASTM A29 1040 |
| Density | 7.85 g/cm³ | 7.85 g/cm³ | 7.85 g/cm³ |
| Tensile Strength | 370 – 480 MPa | 570 – 700 MPa | 550 – 700 MPa |
| Yield Strength | ≥ 245 MPa | ≥ 310 MPa | ≥ 280 MPa |
| Elongation | ≥ 20 % | ≥ 16 % | ≥ 16 % |
| Hardness (HB) | 120 – 160 | 170 – 210 | 170 – 200 |
| Machinability | Good | Very Good | Very Good |
| Weldability | Excellent | Fair (Preheat recommended) | Fair |
| Heat Treatment | Normalized | Annealed / Hardened | Normalized / Hardened |
| Surface Finish | Black / Bright | Black / Bright | Black / Bright |
| Manufacturing Process | Hot Rolled / Cold Drawn | Hot Rolled / Forged | Hot Rolled / Forged |
| Size Range (Square) | 6 mm – 150 mm | 8 mm – 150 mm | 8 mm – 150 mm |
| Length | Random / Fixed / Cut Length | Random / Fixed / Cut Length | Random / Fixed / Cut Length |
| Dimensional Tolerance | IS / ASTM Std | IS / ASTM Std | EN Std |
| Testing | Chemical, Mechanical | Chemical, Mechanical | Chemical, Mechanical |
| Certification | EN 10204 3.1 | EN 10204 3.1 | EN 10204 3.1 |
| HSN / HS Code | 7214.99.90 | 7214.99.90 | 7214.99.90 |
| Typical Applications | General Fabrication | Shafts, Gears, Bolts | Engineering Components |
When choosing carbon steel square bars, engineers and buyers should consider:
Selecting the correct grade ensures better performance, reduced material failure, and long service life.
This section provides procurement-ready technical and commercial clarity for Carbon Steel Square Bars (C20, C45, EN8) supplied by Inox Steel India—covering sizes, weights, indicative pricing, standards, testing, and real-world applications.
Inox Steel India supplies carbon steel square bars in standard market sizes as well as custom cut lengths for fabrication, machining, and structural 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 / ASTM / EN standards
Finish: Hot Rolled (Black), Bright Drawn (Cold Drawn)
📌 Popular demand includes 8mm, 10mm, 12mm, and 25mm square steel bars for fabrication and columns.
Use the below steel square bar weight chart for BOQ preparation and price estimation.
(Density considered: 7.85 g/cm³)
| Square Size (mm) | Weight (kg/m) |
|---|---|
| 6 × 6 | 0.28 |
| 8 × 8 | 0.50 |
| 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 | 33.15 |
| 75 × 75 | 44.16 |
| 100 × 100 | 78.50 |
📌 Common queries addressed:
steel square bar weight
ms square bar weight chart
weight of square iron rod
Prices depend on grade, size, finish, quantity, and market rates. Below are indicative square bar steel prices for reference.
🔹 Indicative Price Range (₹/kg – India)
| Grade | Approx. Price / Kg (INR) | Typical Use |
|---|---|---|
| C20 | ₹ 58 – ₹ 72 | Fabrication, frames, light structures |
| C45 | ₹ 68 – ₹ 90 | Shafts, bolts, machine parts |
| EN8 | ₹ 72 – ₹ 95 | Engineering & automotive components |
📌 Examples buyers often ask:
8mm square bar price
12mm square steel bar price
square bar steel price per kg
🧾 Prices are indicative and vary with mill source, finish (bright vs black), and order volume.
HSN Code (India): 7214.99.90
HS Code (Export): 7214.99
Applicable to carbon steel bars and rods, hot rolled or cold drawn, used for billing and export documentation.
Every carbon steel square bar supplied by Inox Steel India is checked to ensure dimensional accuracy and mechanical reliability.
🧪 Tests Conducted:
📄 Documentation:
Carbon steel square bars are widely used due to their strength, machinability, and cost efficiency.
Buyers rely on Inox Steel India for quality assurance, supply reliability, and technical clarity.
✅ Key Advantages:
Our objective is to ensure right-grade selection, timely delivery, and cost-effective sourcing for every customer.
| Industry | Application | Preferred Grade |
|---|---|---|
| Construction & Infrastructure | Columns, frames, base structures | C20 |
| Fabrication Units | Welded frames, fixtures | C20 |
| Engineering & OEM | Shafts, pins, couplings | C45 / EN8 |
| Automotive & Machinery | Gears, axles, components | EN8 |
| Forging Units | Forging stock | C45 |
| General Engineering | Structural & machined parts | C20 / C45 |
Carbon steel square bars are packed and dispatched to prevent damage and corrosion during transit.
📦 Packing Standards:
🚚 Dispatch Locations: Mumbai, Navi Mumbai, Thane, Pune
🌍 Export Markets: Middle East, Africa, Southeast Asia
Whether you require C20 square bars for construction, C45 for machinery, or EN8 for engineering components, Inox Steel India offers reliable supply with certified quality.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
C45 and EN8 are preferred for machining due to higher strength and wear resistance. Prices generally range from ₹58 – ₹95 per kg, depending on grade, size, and finish. Standard sizes range from 6 mm to 150 mm, with custom sizes available on request. Yes, C20 square bars are commonly used in structural columns and supports. Yes, we supply bright drawn carbon steel square bars for machining applications. Yes, all supplies are accompanied by EN 10204 3.1 Mill Test Certificates. Which carbon steel grade is best for machining?
What is the price of carbon steel square bars in India?
What sizes are available in carbon steel square bars?
Are carbon steel square bars suitable for columns?
Do you supply bright square bars?
Do you provide test certificates?
Inox Steel India is a trusted supplier of carbon steel square bars in C20, C45 & EN8 grades. Get latest price per kg, weight chart & certified stock in India.