Contact us now!

+91 9930796690

GET A QUOTE

Home > Round Bars > Carbon Steel Round Bars

Carbon Steel Round Bars

Carbon Steel Round Bars Manufacturer, Supplier & Exporter – Inox Steel India

Inox Steel India is a trusted manufacturer, supplier, and exporter of Carbon Steel Round Bars in grades C20, C45, EN8, and EN9, supplied in accordance with ASTM A29, EN 10083, and BS 970 standards.

Our carbon steel round bars are widely used across general engineering, machining, automotive, forging, fabrication, and structural industries, serving customers in India, GCC, Middle East, Africa, Europe, and the Americas.

With consistent stock of black (hot rolled) and bright (cold drawn) round bars, Inox Steel India supports both OEM production lines and project-based bulk requirements, offering material with full traceability and certification.

Table of Contents

What Are Carbon Steel Round Bars & How Are They Manufactured?

Carbon steel round bars are solid cylindrical steel products known for their strength, machinability, weldability, and cost-effectiveness. They are widely preferred for mechanical and structural components where high load-bearing capacity and ease of fabrication are essential.

At Inox Steel India, carbon steel round bars are manufactured using controlled rolling and drawing processes to achieve uniform mechanical properties and dimensional accuracy.

Manufacturing Process Overview

  • Steel Billet Selection: Carbon steel billets are selected based on carbon content and mechanical property requirements for grades C20, C45, EN8, and EN9.
  • Hot Rolling: Billets are hot rolled into round bar form to achieve the required diameter and grain structure.
  • Cold Drawing (Bright Bars): Selected sizes undergo cold drawing to obtain tighter tolerance, smoother surface, and improved straightness.
  • Heat Treatment: Normalizing or quenching & tempering is performed depending on grade and application.
  • Straightening & Cutting: Bars are straightened and cut into random or customer-specified lengths.
  • Inspection & Testing: Each batch is tested for chemical composition, mechanical strength, and dimensional accuracy.

This process ensures carbon steel round bars suitable for machining, forging, welding, and high-strength applications.

Key Advantages of Carbon Steel Round Bars from Inox Steel India

  • High strength with excellent load-bearing capacity
  • Good machinability for turned and milled components
  • Suitable for welding and fabrication
  • Cost-effective compared to alloy and stainless steels
  • Available in hot rolled (black) and bright drawn finishes
  • Consistent mechanical properties across batches

These advantages make carbon steel round bars a preferred choice for industrial components, automotive parts, and structural uses.

Grades & Standards Available

Inox Steel India supplies carbon steel round bars in the following grades:

  • C20 – Low carbon steel for general engineering and fabrication
  • C45 – Medium carbon steel with higher strength and hardness
  • EN8 – Widely used engineering steel for shafts and axles
  • EN9 – Higher carbon steel for applications requiring greater strength

Applicable Standards:
ASTM A29 / EN 10083 / BS 970
MASTER TECHNICAL DATA SHEET:
Carbon Steel Round Bars

Parameter C20 C45 EN8 EN9
Product Form Solid Round Bar Solid Round Bar Solid Round Bar Solid Round Bar
Material Category Carbon Steel Medium Carbon Steel Medium Carbon Steel High Carbon Steel
Standard ASTM A29 / EN 10083 ASTM A29 / EN 10083 BS 970 / EN 10083 BS 970 / EN 10083
Equivalent Grades AISI 1020 AISI 1045 AISI 1040 AISI 1050
Manufacturing Process Hot Rolled / Cold Drawn Hot Rolled / Cold Drawn Hot Rolled / Bright Drawn Hot Rolled / Bright Drawn
Diameter Range (mm) 6 – 500 mm 6 – 500 mm 6 – 450 mm 6 – 400 mm
Standard Sizes (mm) 6, 8, 10, 12, 16, 20, 22, 25, 32, 40, 50, 65, 80, 100 Same as C20 Same as C20 Same as C20
Length Random / Fixed / Cut-to-Length Random / Fixed / Cut-to-Length Random / Fixed / Cut-to-Length Random / Fixed / Cut-to-Length
Surface Finish Black / Bright Black / Bright Black / Bright Black / Bright
Density (g/cm³) 7.85 7.85 7.85 7.85
Carbon Content (%) 0.17 – 0.23 0.42 – 0.50 0.35 – 0.45 0.50 – 0.60
Tensile Strength (MPa) 410 – 550 570 – 700 550 – 700 650 – 800
Yield Strength (MPa) ≥ 245 ≥ 310 ≥ 280 ≥ 350
Elongation (%) ≥ 25 ≥ 16 ≥ 16 ≥ 14
Hardness (HB) ≤ 170 ≤ 229 ≤ 201 ≤ 255
Heat Treatment As Rolled / Normalized Normalized / Q&T Normalized / Q&T Normalized / Q&T
Machinability Good Very Good Very Good Moderate
Weldability Excellent Good Good Fair
Typical Applications General Engineering Shafts, Gears Axles, Pins High Strength Parts
Testing Chemical, Mechanical, UT Chemical, Mechanical, UT Chemical, Mechanical, UT Chemical, Mechanical, UT
Certification EN 10204 3.1 / 3.2 EN 10204 3.1 / 3.2 EN 10204 3.1 / 3.2 EN 10204 3.1 / 3.2
HSN Code 7214 / 7228 7214 / 7228 7214 / 7228 7214 / 7228
Export Suitability Domestic & Export Export Export Export

Key Factors to Consider When Selecting Carbon Steel Round Bars

  • Strength Requirement: C45 and EN9 are preferred where higher tensile strength is required.
  • Machinability: EN8 offers a balanced combination of strength and machinability.
  • Weldability: C20 provides excellent weldability for fabrication work.
  • Heat Treatment Needs: EN8 and EN9 can be heat treated to enhance mechanical performance.
  • Cost Efficiency: Carbon steel round bars offer economical solutions for high-volume applications.

Global & Indian Demand Overview

India: Strong demand from automotive clusters, machining units, forging houses, and fabrication workshops in Mumbai, Pune, Ludhiana, Faridabad, and Coimbatore.

GCC & Middle East: Used for structural components, oilfield equipment parts, and industrial machinery.

Africa & Europe: Widely used in construction, mining equipment, and general engineering applications.

Inox Steel India supports these markets with ready stock, consistent quality, and export-compliant documentation.

 

Applications of Carbon Steel Round Bars

Carbon steel round bars supplied by Inox Steel India are extensively used in industries where strength, machinability, weldability, and cost efficiency are critical.

Industry / Sector Typical Applications Preferred Grades
General Engineering Shafts, pins, bolts, machined components C20, EN8
Automotive Axles, gears, studs, suspension parts EN8, C45
Forging Industry Forged components, blanks C45, EN9
Fabrication & Structural Frames, supports, base plates C20
Machinery Manufacturing Couplings, rollers, spindles EN8, C45
Heavy Engineering High-strength mechanical parts EN9

Carbon Steel Round Bar Size Range & Standard Dimensions

Standard Diameter Range (mm):
6 mm, 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 22 mm, 25 mm, 32 mm, 40 mm, 50 mm, 65 mm, 80 mm, 100 mm and above up to 500 mm

Length Options:
Random Lengths
Fixed Lengths
Custom Cut-to-Length (as per drawing or requirement)

Finish Options:
Hot Rolled (Black Steel Bars)
Cold Drawn / Bright Bars

Bright bars are preferred for precision machining and dimensional accuracy, while black bars are widely used for forging and structural applications.

Carbon Steel Round Bar Weight Calculation

Weight (kg/m) = (D² × 0.006165)
Where D = Diameter in mm

Carbon Steel Round Bar Price – Indicative Range

Grade Approx. Price INR/kg Typical Use
C20 ₹ 55 – ₹ 75 Fabrication & general engineering
EN8 ₹ 65 – ₹ 90 Machining & automotive
C45 ₹ 75 – ₹ 110 Shafts & forged parts
EN9 ₹ 90 – ₹ 130 High-strength applications

Prices are indicative and subject to fluctuation based on steel rates and size.

HSN / HS Code for Carbon Steel Round Bars

HSN Code: 7214 / 7228

Testing & Quality Assurance

  • Chemical Composition Analysis
  • Mechanical Testing (Tensile, Yield, Elongation)
  • Ultrasonic Testing (UT)
  • Dimensional & Surface Inspection

Documentation Supplied:
EN 10204 3.1 / 3.2 Mill Test Certificate
Heat Number Traceability
Third-Party Inspection (SGS / BV / TUV) on request

Why Choose Inox Steel India for Carbon Steel Round Bars

Inox Steel India is a dependable carbon steel round bar manufacturer and supplier in Mumbai, supplying certified material for both domestic consumption and export markets.

  • Ready stock of carbon steel round bars in multiple diameters
  • Compliance with ASTM A29, EN 10083, and BS 970
  • Supply in hot rolled (black) and cold drawn (bright) finishes
  • Custom cut lengths to reduce machining and fabrication waste
  • Complete EN 10204 3.1 / 3.2 certification
  • Competitive carbon steel round bar price per kg in India
  • Export-ready packing and documentation

Industries We Serve

Industry Application
Automotive Axles, shafts, suspension components
Engineering Machined parts, spindles, couplings
Forging Forged blanks and components
Fabrication Structural frames and supports
Machinery Manufacturing Rollers, pins, bushings
Infrastructure Construction and industrial support parts

Packaging & Export Readiness

  • Bundled with steel straps
  • HDPE or protective wrapping
  • Wooden pallets or crates for export shipments
  • Clear marking with grade, diameter, heat number, and standard

Export Destinations:
UAE, Saudi Arabia, Oman, Qatar, Nigeria, South Africa, Germany, Italy, and other global markets.

Dispatches are handled through JNPT (Mumbai), Mundra, and Hazira ports.

Carbon Steel Round Bar Supplier Near Alankar Cinema, Mumbai

If you are looking for a carbon steel round bar supplier near Alankar Cinema, Mumbai, Inox Steel India offers quick availability, competitive pricing, and certified material with nationwide delivery support.

Contact Inox Steel India – Get a Quick Quote

Prices generally range between ₹55 – ₹130 per kg, depending on grade and diameter.

EN8 is commonly preferred due to good machinability and strength balance.

Yes, cold drawn bright bars provide tighter tolerance and smooth surface finish.

The HSN code is 7214 / 7228.

Yes, we supply cut-to-length carbon steel round bars as per customer requirements.

CONTACT US