A carbon steel hex bar is a solid long product with a hexagonal (six-sided) cross section, used in applications requiring positive spanner grip, torque transmission, and structural strength. Compared to round bars, hex bars provide improved resistance to rotation and are commonly used for nuts, bolts, studs, and machined components.
Carbon steel hex bars are produced from carbon steel billets using hot rolling, cold drawing (bright bar process), or forging, followed by heat treatment and finishing to meet dimensional and mechanical requirements.
Inox Steel India is a manufacturer, supplier, and exporter of carbon steel hex bars, supplying to engineering and fabrication industries across India, GCC countries, the Middle East, Africa, Europe, and North & South America.
Carbon steel hex bars are supplied in EN8, C45, and ASTM A36 grades, manufactured in accordance with EN 10083 and ASTM standards. These grades are widely used where mechanical strength, machinability, and cost efficiency are primary requirements.
With controlled sourcing and standard-compliant processing, carbon steel hex bars supplied by Inox Steel India offer uniform across-flat dimensions, consistent mechanical properties, and suitability for machining and fabrication applications.
These characteristics make carbon steel hex bars suitable for general engineering and structural applications.
Carbon steel hex bars are supplied in the following grades:
EN8 – Medium carbon steel with good strength and machinability
C45 – Higher carbon content for improved hardness and wear resistance
ASTM A36 – Structural carbon steel for fabrication and general use
Materials are supplied as per EN 10083 and ASTM A36 specifications.
Refer to the approved Master Technical Data Sheet for chemical composition, mechanical properties, and standard hex bar sizes in mm.
Proper grade selection ensures performance reliability and cost efficiency.
In India, carbon steel hex bars are commonly used by fastener manufacturers, CNC machining units, fabrication workshops, and structural component manufacturers, particularly in industrial regions such as Mumbai, Pune, Ahmedabad, Ludhiana, and Coimbatore.
Export demand is driven by engineering goods, machinery parts, and general fabrication components requiring EN and ASTM-compliant carbon steel bars.
Service Use: General engineering and machining applications.
Typical Applications: Nuts, bolts, studs, shafts, pins, and machined components.
Industry Sectors: Engineering | Automotive | Fabrication | Machinery Manufacturing
Service Use: Medium carbon applications requiring higher strength and wear resistance.
Typical Applications: Fasteners, gears, mechanical parts, high-load components.
Industry Sectors: Heavy Engineering | Industrial Machinery | Mechanical Works
Service Use: Structural and fabrication applications.
Typical Applications: Frames, supports, brackets, structural fasteners, fabricated assemblies.
Industry Sectors: Construction | Infrastructure | Fabrication
Carbon steel hex bars are supplied in standard metric hex bar sizes in accordance with EN and ASTM tolerances.
| AF Size (mm) | Approx. Weight (kg/m) |
| 8 | 0.43 |
| 10 | 0.68 |
| 12 | 0.98 |
| 16 | 1.74 |
| 20 | 2.72 |
| 25 | 4.25 |
| 30 | 6.11 |
| 40 | 10.86 |
| 50 | 16.90 |
| 60 | 24.60 |
Weights are indicative and may vary based on tolerance and finish.
| Grade | Approx. Price Range (INR / kg) |
| EN8 | ₹ 65 – ₹ 90 |
| C45 | ₹ 70 – ₹ 100 |
| ASTM A36 | ₹ 55 – ₹ 80 |
Prices depend on size, finish (black / bright), quantity, and prevailing market conditions.
HSN Code: 7214
Material can be supplied with EN 10204 3.1 certification on request.
Whether you require EN8 hex bars for machining, C45 hex bars for higher strength applications, or ASTM A36 hex bars for fabrication, our team will assist with grade selection, pricing, and delivery schedules.
Standard across-flat sizes range from 8 mm to 60 mm. Other sizes can be supplied on request.
Yes, tool steel hex bars can be supplied in annealed or hardened & tempered condition.
The applicable HSN code is 7228.
Yes, custom cut lengths are available as per requirement.
Material can be supplied with EN 10204 3.1 test certification on request.