Alloy Steel Round Bars
Alloy Steel Round Bars: Manufacturer, Supplier & Exporter in India
Alloy steel round bars are widely used in industrial engineering applications due to their excellent strength, durability, and resistance to wear and fatigue. These bars are manufactured by adding alloying elements such as chromium, molybdenum, nickel, and manganese to improve the mechanical and chemical properties of the steel. Because of these enhanced properties, alloy steel round bars are commonly used in heavy-duty machinery, automotive components, oil and gas equipment, and structural engineering projects.
Alloy steel rods and alloy steel bar stock are available in multiple grades and finishes including hot rolled, cold drawn, forged, and bright bars. These materials are designed to perform under high stress, extreme temperatures, and demanding mechanical environments. Industries prefer alloy steel round bars because they offer excellent toughness, high tensile strength, and improved corrosion resistance compared to conventional carbon steels.
Stellar Alloys Steel Pipes and Tubes is a trusted manufacturer and supplier of alloy steel round bars with over 15 years of industry experience. We are ISO 9001:2015 certified and supply premium-quality alloy steel rods in grades including EN24, EN31, 4140, 4340, and other custom alloys to clients across 30+ countries. All products conform to ASTM, AISI, and EN international standards and are third-party tested to ensure reliable performance in critical applications.
With advanced manufacturing processes and strict quality control, Stellar Alloys Steel Pipes and Tubes supplies alloy steel round bar products suitable for engineering, construction, power generation, petrochemical, and automotive sectors. These alloy steel bar products are manufactured with precise dimensional accuracy and superior metallurgical properties to ensure long service life and consistent performance.
Table of Contents
- Types of Alloy Steel Round Bars
- Specification of Alloy Steel Round Bars
- Chemical Composition of Alloy Steel Round Bars
- Mechanical Properties of Alloy Steel Round Bars
- Alloy Steel Round Bars Sizes
- Alloy Steel Round Bar Grade Equivalents
- Alloy Steel Round Bars Price List
- Quality Assurance & Testing
- Applications & Uses of Alloy Steel Round Bars
- Related Products
- FAQs About Alloy Steel Round Bars
Types of Alloy Steel Round Bars
We manufacture stainless steel round bars in multiple grades and finishes to meet diverse industrial requirements:
EN31 Round Bars
EN24 Round Bars
EN24 Round Bars
EN24 round bars are high tensile alloy steel bars known for their excellent toughness, fatigue resistance, and high strength. These bars contain nickel, chromium, and molybdenum which improve their hardenability and wear resistance. EN24 alloy steel round bars are widely used in manufacturing gears, shafts, bolts, and heavy-duty mechanical parts.
EN31 Round Bars
EN31 round bars are high carbon alloy steel bars that provide exceptional hardness and wear resistance. These bars are commonly used for bearing manufacturing, automotive components, rollers, and precision engineering tools. EN31 alloy steel rods offer excellent machinability and superior performance in applications requiring high surface hardness.
Specification of Alloy Steel Round Bars
Specification | Details |
Material | Alloy Steel |
Grades | EN24, EN31 |
Form | Alloy Steel Round Bars / Alloy Steel Rods |
Diameter | 6 mm to 500 mm |
Length | 3 m to 6 m |
Finish | Black, Bright, Polished |
Surface Treatment | Hot Rolled, Cold Drawn, Peeled, Turned & Polished, Centerless Ground |
Standards | ASTM, AISI, EN |
Chemical Composition of Alloy Steel Round Bars
Element | EN24 (%) | EN31 (%) |
Carbon | 0.36 – 0.44 | 0.90 – 1.20 |
Manganese | 0.45 – 0.70 | 0.30 – 0.75 |
Silicon | 0.10 – 0.35 | 0.10 – 0.35 |
Chromium | 1.00 – 1.40 | 1.00 – 1.60 |
Nickel | 1.30 – 1.70 | — |
Molybdenum | 0.20 – 0.35 | — |
Sulfur | 0.04 max | 0.05 max |
Phosphorus | 0.04 max | 0.05 max |
Mechanical Properties of Alloy Steel Round Bars
Property | EN24 | EN31 |
Tensile Strength | 850 – 1000 MPa | 750 – 980 MPa |
Yield Strength | 680 MPa | 450 MPa |
Hardness | 248 HB | 60 HRC |
Elongation | 13% | 10% |
Alloy Steel Round Bars Sizes
Alloy steel round bars are available in a wide variety of sizes depending on industrial requirements. Typical sizes include:
- Diameter: 6 mm to 500 mm
- Length: 3 meters to 6 meters
- Finish options: Hot Rolled, Bright Bar, Cold Drawn
- Shape: Round Bar / Alloy Steel Rods
Custom sizes and lengths can also be manufactured based on specific project requirements.
Alloy Steel Round Bar Grade Equivalents
Understanding grade equivalents helps engineers and procurement teams identify the right material across different international standards. Below is a quick reference for common alloy steel round bar grades:
British Standard (BS) | AISI/SAE (USA) | DIN (Germany) | JIS (Japan) |
EN24 | AISI 4340 | 1.6511 (34CrNiMo6) | SNCM439 |
EN31 | AISI 52100 | 1.3505 (100Cr6) | SUJ2 |
EN19 | AISI 4140 | 1.7225 (42CrMo4) | SCM440 |
Alloy Steel Round Bars Price List
Product | Size | Price (Approx) |
Alloy Steel Round Bars | 10 mm – 50 mm | ₹95 – ₹140 per kg |
EN24 Round Bars | 20 mm – 200 mm | ₹120 – ₹180 per kg |
EN31 Round Bars | 20 mm – 150 mm | ₹110 – ₹170 per kg |
Quality Assurance & Testing
Every batch of alloy steel round bars undergoes strict quality control procedures to ensure compliance with international manufacturing standards and customer specifications. Quality assurance plays a critical role in ensuring that alloy steel rods deliver consistent mechanical strength, durability, and dimensional accuracy.
The quality testing process typically includes:
Chemical composition analysis using advanced spectrometer testing
Mechanical property testing including tensile strength, yield strength, and hardness testing
Dimensional accuracy and surface finish inspection
Ultrasonic or non-destructive testing when required
Third-party inspection available upon customer request
Mill Test Certificates (MTC) provided with every shipment
These quality control measures ensure that alloy steel round bars meet industry standards and provide reliable performance in demanding applications such as automotive components, heavy engineering machinery, power plants, and oil & gas equipment.
Our stainless steel round bars serve mission-critical applications across multiple industries due to their exceptional strength, corrosion resistance, and reliability in harsh environments:
Common applications include:
- Oil and Gas Industry – Downhole pump shafts, valve stems, instrumentation components, and wellhead equipment
- Chemical Processing Plants – Reactor vessel shafts, agitator components, pump impellers, and corrosion-resistant fasteners
- Marine and Offshore Structures – Propeller shafts, deck equipment, rigging hardware, and saltwater-resistant fittings
- Automotive and Mechanical Engineering – Engine components, transmission shafts, precision machined parts, and suspension elements
- Pump and Valve Manufacturing – Valve stems, pump shafts, piston rods, and high-pressure fittings
- Construction and Structural Frameworks – Architectural supports, railing systems, and load-bearing structural members
- Food Processing Equipment – Mixer shafts, conveyor components, sanitary fittings, and hygienic processing machinery
- Aerospace Components – Landing gear parts, high-strength fasteners, precision machined aircraft components
Applications & Uses of Alloy steel round bars
Alloy steel round bars are widely used across multiple industrial sectors due to their high strength and durability.
Common applications include:
- Automotive components
- Heavy engineering machinery
- Oil and gas equipment
- Power generation plants
- Industrial shafts and gears
- Construction and structural engineering
- Manufacturing of bearings and rollers
- Tool and die production
These alloy steel rods are ideal for applications that require high load-bearing capacity and resistance to wear and fatigue.
Related Products
Explore our complete range of steel products:
- Stainless Steel Round Bars
- Carbon Steel Round Bars
FAQs About Alloy Steel Round Bars
Alloy steel round bars are steel bars that contain additional alloying elements such as chromium, nickel, and molybdenum to improve strength, hardness, and corrosion resistance.
Common grades include EN24, EN31, AISI 4140, and AISI 4130 depending on the application requirements.
Industries such as automotive, oil and gas, construction, power generation, and heavy engineering widely use alloy steel rods.
Standard sizes range from 6 mm to 500 mm diameter, with lengths typically between 3 m and 6 m.
EN24 is a high tensile alloy steel suitable for heavy mechanical parts, while EN31 is a high carbon alloy steel commonly used for bearings and wear-resistant components.