Grades: EN19, EN24, AISI 4140
Inox Steel India is a manufacturer, supplier, and exporter of alloy steel hex bars, supplying to engineering, automotive, and industrial machinery sectors across India, GCC countries, the Middle East, Africa, Europe, and North & South America.
Alloy steel hex bars are supplied in EN19, EN24, and AISI 4140 grades, manufactured in accordance with EN 10083 and ASTM standards. These grades are selected for applications requiring high tensile strength, fatigue resistance, and load-bearing capability.
With controlled heat treatment and dimensional processing, alloy steel hex bars supplied by Inox Steel India offer consistent mechanical properties, uniform across-flat dimensions, and suitability for critical engineering applications.
An alloy steel hex bar is a solid long product with a hexagonal (six-sided) cross section, manufactured from alloy steel containing chromium, molybdenum, and nickel (where applicable). The hexagonal profile provides positive spanner grip and torque transmission, making these bars suitable for high-strength fasteners, shafts, gears, and machined components.
Alloy steel hex bars are produced from alloy steel billets using hot rolling, cold drawing (bright bar processing), or forging, followed by heat treatment to achieve the required mechanical properties.
These properties make alloy steel hex bars suitable for automotive, machinery, power transmission, and heavy engineering applications.
Alloy steel hex bars are supplied in the following grades:
Materials are supplied as per EN 10083 and ASTM A29 / A322 specifications.
MASTER TECHNICAL DATA SHEET-ALLOY STEEL HEX BARS
| Parameter | EN19 (42CrMo4) | EN24 (AISI 4340) | AISI 4140 |
|---|---|---|---|
| Product Form | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) |
| Standard | EN 10083-3 | EN 10083-3 | ASTM A29 / A322 |
| Material Type | Chromium-Molybdenum Alloy Steel | Nickel-Chromium-Molybdenum Alloy Steel | Chromium-Molybdenum Alloy Steel |
| Manufacturing Process | Hot Rolled / Bright (Cold Drawn) / Forged | Hot Rolled / Bright (Cold Drawn) / Forged | Hot Rolled / Bright (Cold Drawn) / Forged |
| Surface Finish | Black / Bright | Black / Bright | Black / Bright |
| Supply Condition | As Rolled / Q&T / Normalized | As Rolled / Q&T / Normalized | As Rolled / Q&T / Normalized |
| Carbon (C) % | 0.38 – 0.43 | 0.36 – 0.44 | 0.38 – 0.43 |
| Manganese (Mn) % | 0.60 – 0.90 | 0.60 – 0.80 | 0.75 – 1.00 |
| Chromium (Cr) % | 0.90 – 1.20 | 0.70 – 0.90 | 0.80 – 1.10 |
| Molybdenum (Mo) % | 0.15 – 0.30 | 0.20 – 0.30 | 0.15 – 0.25 |
| Nickel (Ni) % | — | 1.30 – 1.70 | — |
| Tensile Strength (MPa) | 850 – 1000 | 900 – 1100 | 850 – 1000 |
| Yield Strength (MPa) | ≥680 | ≥750 | ≥655 |
| Elongation (%) | ≥13 | ≥12 | ≥14 |
| Hardness | 248 – 302 HB | 248 – 302 HB | 248 – 302 HB |
| Impact Resistance | High | Very High | High |
| Machinability | Good (Annealed) | Moderate | Good (Annealed) |
| Weldability | Limited (Preheat Required) | Limited (Preheat Required) | Limited (Preheat Required) |
| Standard AF Sizes (mm) | 8 – 60 | 8 – 60 | 8 – 60 |
| Approx. Weight @12 mm AF | 0.98 kg/m | 0.98 kg/m | 0.98 kg/m |
| Approx. Weight @20 mm AF | 2.72 kg/m | 2.72 kg/m | 2.72 kg/m |
| Approx. Weight @30 mm AF | 6.11 kg/m | 6.11 kg/m | 6.11 kg/m |
| Standard Length | 3 m / 6 m | 3 m / 6 m | 3 m / 6 m |
| Custom Cut Length | Available | Available | Available |
| Dimensional Tolerance | As per EN | As per EN | As per ASTM |
| Heat Treatment Options | Annealed / Q&T / Normalized | Annealed / Q&T / Normalized | Annealed / Q&T / Normalized |
| Testing | Chemical, Mechanical, Impact | Chemical, Mechanical, Impact | Chemical, Mechanical |
| Certification | EN 10204 3.1 | EN 10204 3.1 | EN 10204 3.1 |
| HSN / HS Code | 7228 | 7228 | 7228 |
| Typical Applications | Shafts, Gears, Bolts | Aerospace, Heavy Gears | Machinery, Automotive |
| Packaging | Bundled / Wooden Crates | Bundled / Wooden Crates | Bundled / Wooden Crates |
When selecting alloy steel hex bars, the following parameters should be evaluated:
Proper grade and condition selection ensures performance reliability and service life in demanding applications.
In India, alloy steel hex bars are widely used by automotive component manufacturers, gear and shaft manufacturers, CNC machining units, and heavy engineering industries, particularly in industrial regions such as Pune, Chennai, Bengaluru, Ahmedabad, and Ludhiana.
Export demand is driven by machinery, power transmission, and engineering components requiring EN and ASTM-compliant alloy steel bars.
Alloy steel hex bars supplied by Inox Steel India are used in applications requiring high strength, fatigue resistance, and dimensional stability. Selection of grade and heat-treatment condition depends on load, service stress, and machining requirements.
Alloy steel hex bars are supplied in standard metric hex bar sizes as per EN and ASTM tolerances.
(Refer to standard hex bar sizes in mm PDF and hex bar size chart in mm India for complete size and weight details.)
| 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 surface finish.
| Grade | Approx. Price Range (INR / kg) |
|---|---|
| EN19 | ₹ 110 – ₹ 160 |
| EN24 | ₹ 150 – ₹ 220 |
| AISI 4140 | ₹ 120 – ₹ 180 |
Prices vary based on size, heat-treatment condition (annealed / Q&T), finish (black / bright), quantity, and market conditions.
HSN Code: 7228
Applicable for alloy steel bars and rods under Indian and international trade classification.
Alloy steel hex bars are inspected and tested to ensure compliance with applicable standards.
Material can be supplied with EN 10204 3.1 certification on request.
Inox Steel India supplies alloy steel hex bars with controlled processing, standard compliance, and documented traceability. Material is produced and inspected to meet project requirements for high-strength and load-bearing applications.
Key supply features:
Alloy steel hex bars are supplied to the following industries:
Grade and condition selection is aligned with load conditions, fatigue requirements, and machining practices.
Alloy steel hex bars are packed and dispatched as per standard industrial and export practices.
Dispatch is supported through JNPT (Mumbai), Mundra, and Hazira ports for export shipments.
Alloy Steel Hex Bars Manufacturer & Supplier – EN19, EN24, 4140 | Inox Steel India
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
Standard across-flat sizes range from 8 mm to 60 mm. Other sizes can be supplied on request. Yes, alloy steel hex bars can be supplied in annealed, normalized, or quenched & tempered condition. The applicable HSN code is 7228. Yes, alloy steel hex bars can be supplied in custom cut lengths as per requirement. Material can be supplied with EN 10204 3.1 certification on request. What are the standard hex bar sizes in mm?
Are heat-treated alloy steel hex bars available?
What is the HSN code for alloy steel hex bars?
Are custom cut lengths available?
Is test certification provided with supply?
Manufacturer and supplier of alloy steel hex bars in EN19, EN24, and AISI 4140 grades. Standard and custom sizes supplied across India by Inox Steel India.