When strength meets precision, when resilience meets machinability—that’s when alloy steel round bars become indispensable. At Behari Lal Engineering, widely recognized as the best steel company in India, our alloy steel round bars are engineered for performance-critical applications across automotive, energy, construction, and heavy engineering sectors.

From case hardening grades to high-strength quench and temper steels, each round bar is crafted through deep metallurgical understanding, strict process controls, and customer-specific mechanical property tuning.

Let’s take a closer look at the most in-demand alloy steel grades we offer—and why they matter.

1. 20MnCr5 / 16MnCr5 – Case Hardening Steels

Application: Gears, pinions, shafts, camshafts

Why It Matters:

These low-carbon, high-hardness steels are used for components requiring a hard, wear-resistant surface and a tough core. Ideal for carburizing and case hardening, they ensure excellent fatigue resistance without sacrificing ductility.

• 16MnCr5: Lower carbon for better machinability before heat treatment
• 20MnCr5: Higher carbon for deeper case depth and surface hardness

Heat Treatability: Excellent for carburizing, followed by quenching and tempering

2. EN8 / EN9 – Medium Carbon Steels

Application: Axles, spindles, crankshafts, and machine tools

Why It Matters:

EN8 (C40) and EN9 (C45) offer a balance of strength and ductility and are widely used where surface hardness and core strength are both necessary. These are workhorse grades in general engineering and automotive components.

• EN8: Moderate tensile strength and good machinability
• EN9: Higher carbon content for improved wear resistance

Machinability: Good; weldability lower due to higher carbon

Heat Treatment: Suitable for hardening and tempering

3. EN19 (42CrMo4) – Chromium Molybdenum Steel

Application: High-load shafts, gears, bolts, and connecting rods

Why It Matters:

This quench and temper steel is known for its exceptional tensile strength, toughness, and fatigue resistance. It maintains high performance under shock loading and stress cycling—critical in transmission and drivetrain systems.

Key Properties:

• High tensile strength after QT treatment
• Excellent fatigue resistance
• Maintains dimensional stability during machining

4. EN24 (817M40) – Nickel Chromium Molybdenum Steel

Application: Gears, aircraft components, high-stress mechanical parts

Why It Matters:

If you're working with aerospace-grade components or heavy-duty drive systems, EN24 delivers. Its high hardenability, impact strength, and wear resistance make it ideal for applications that experience rotational or dynamic loading.

Heat Treatment: Through hardening, induction hardening, and tempering

Strength Level: Among the highest in the medium-alloy category

5. EN36 – Deep Case Hardening Alloy

Application: Gears, rollers, crankshafts

Why It Matters:

EN36 is a nickel-chromium case hardening steel with a deep hardenability profile. It offers a tough core with an extremely hard surface—perfect for high-load sliding contacts.

Use Case: High-speed railway axles, powertrain components.

Carburizing Depth: Superior for extreme surface wear resistance

6. SAE 4140 – Chromium-Molybdenum Alloy

Application: Oil & gas drilling, forging dies, machine tool spindles

Why It Matters:

4140 is a versatile, high-strength steel offering superior toughness and fatigue strength, even in thick sections. Its shock resistance and wear resistance make it suitable for both static and dynamic load-bearing components.

Heat Treatment Response: Excellent hardenability, suitable for oil or water quenching

Machinability: Good pre- and post-heat treatment

7. SAE 8620 – Case Hardening Steel

Application: Gear blanks, crankshafts, camshafts

Why It Matters:

With a low carbon base and strong nickel-chromium-molybdenum blend, SAE 8620 provides a hard outer surface and tough inner core post-carburizing. It’s an essential alloy for precision automotive and industrial gearing.

Finish Quality: High polish achievable

Heat Treatment Compatibility: Ideal for case hardening and quenching

Why Choose Behari Lal Engineering?

As one of the best steel companies in India, our commitment goes beyond just supplying steel. We engineer metallurgical solutions that:

• Meet customer-specific strength, hardness, and tolerance standards
• Pass through rigorous in-house quality testing—ultrasonic, chemical, and mechanical
• Are delivered with traceable heat numbers and certification
• Are available in customized sizes, lengths, and finishes

Whether you're sourcing steel for OEM production, industrial maintenance, or high-stress fabrication, our alloy steel round bars offer the consistency, performance, and metallurgical reliability that modern industry demands.

Conclusion

In a world where component failure is not an option, alloy selection matters. At Behari Lal Engineering, we deliver precision-engineered alloy steel round bars backed by decades of metallurgical expertise and process integrity. Our steel isn't just strong—it's smart, tested, and ready for your toughest applications.

Looking for high-performance alloy steel from the best steel company in India?

Trust Behari Lal Engineering - where quality meets capability.