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20MnCr5 Alloy Steel | Chemical Composition, Properties, and Suppliers in India
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Explore 20MnCr5 alloy steel’s composition, properties, mechanical performance, and key applications. Find trusted suppliers of 20MnCr5 round bars, plates, and forgings in India.
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20MnCr5 alloy steel, 20MnCr5 steel properties, 20MnCr5 chemical composition, 20MnCr5 round bar supplier, 20MnCr5 mechanical properties, EN 10084 steel, case hardening alloy steel India
🔩 20MnCr5 Alloy Steel – Premium Case Hardening Steel for High-Wear Applications
20MnCr5 alloy steel is a low-carbon case hardening steel grade specified under EN 10084, widely used in the manufacturing of gears, shafts, and wear-resistant parts. Engineered for applications demanding high surface hardness and strong, ductile cores, 20MnCr5 offers enhanced hardenability and case depth over 16MnCr5, thanks to its slightly higher carbon and chromium content.
This makes it a preferred material in the automotive, mechanical, transmission, and tooling industries.
📘 What is 20MnCr5 Alloy Steel?
20MnCr5 is a carburizing steel—designed to be hardened on the surface while maintaining toughness and strength internally. With around 0.20% carbon, it is suitable for carburizing, quenching, and tempering, giving it the ability to withstand surface wear and fatigue while resisting breakage under stress.
It conforms to EN 10084: Case Hardening Steels and is denoted by material number 1.7147.
🧪 20MnCr5 Chemical Composition (as per EN 10084)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.17 – 0.22 |
| Manganese (Mn) | 1.10 – 1.40 |
| Chromium (Cr) | 1.00 – 1.30 |
| Silicon (Si) | ≤ 0.40 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.035 |
| Iron (Fe) | Balance |
The combination of manganese and chromium increases hardenability, wear resistance, and toughness.
🔧 Mechanical Properties of 20MnCr5 Alloy Steel
| Property | Typical Value |
|---|---|
| Tensile Strength (core) | 600 – 900 MPa |
| Yield Strength (core) | ≥ 450 MPa |
| Elongation | ≥ 10% |
| Impact Toughness | ≥ 35 J (at 20°C) |
| Surface Hardness (carburized) | 58 – 62 HRC |
| Core Hardness (quenched) | 28 – 40 HRC |
Note: Actual mechanical properties depend on the heat treatment process, especially carburizing depth and cooling rate.
💡 Key Features of 20MnCr5 Steel
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✅ High hardenability and deep case depth
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✅ Excellent surface wear resistance after carburizing
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✅ Tough core with good fatigue strength
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✅ Suitable for precision forging and machining
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✅ Superior mechanical performance under dynamic loads
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✅ Conforms to EN 10084 standards
🏭 Applications of 20MnCr5 Alloy Steel
20MnCr5 is primarily used in the automotive and engineering sectors where components need a hard, wear-resistant surface and a tough core to absorb shocks.
Typical applications include:
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⚙️ Transmission gears and shafts
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🚗 Automotive drive components
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🔩 Bolts, pins, and fasteners
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🛠️ Bearing cages and bushings
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🔧 Camshafts and crankshafts
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🧲 Sprockets and spindles
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🚜 Components in tractors and heavy-duty equipment
🔁 Equivalent Grades of 20MnCr5 Steel
| Standard | Equivalent Grade |
|---|---|
| AISI/SAE | 5120 |
| UNS | G51200 |
| DIN | 1.7147 |
| JIS | SCM420H |
| IS (India) | 20MnCr5 |
Always consult material datasheets or metallurgists before substituting grades for critical applications.
📏 Forms of Supply – 20MnCr5 Steel
We supply 20MnCr5 steel in various shapes and sizes as per your project or machining needs:
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Round Bars (Hot Rolled, Peeled, Turned & Polished)
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Flat Bars & Forged Blocks
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Billets & Hollow Bars
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Rings, Discs, Bushings (Open Die Forging)
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Cut-to-Length or Custom Machined Components
Size Availability:
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Diameter: 20 mm to 600 mm
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Length: Up to 6 meters (custom cut available)
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Condition: Annealed, Normalized, Hardened & Tempered
🇮🇳 20MnCr5 Alloy Steel Supplier in India
We are a leading supplier and stockist of 20MnCr5 alloy steel in India, with ready inventory in Mumbai, Pune, Hyderabad, Chennai, Delhi, and Ahmedabad. Whether you need forged rounds, plates, or custom-size bars, we deliver across India and export globally.
✅ Why Choose Us?
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✔️ ISO 9001:2015 Certified
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✔️ Huge inventory in multiple sizes
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✔️ Heat treatment & third-party inspection (TPI) support
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✔️ Quick dispatch & export-ready packaging
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✔️ Technical consultation & material traceability
📞 Contact Us
Need a quote or more details on 20MnCr5 alloy steel?
📧 Email: sales@yourcompany.com
📞 Phone: +91-XXXXXXXXXX
🌐 Website: www.yourcompany.com
Request free datasheets, test certificates, and pricing tailored to your project needs.
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✅ Frequently Asked Questions (FAQs)
❓ What is 20MnCr5 used for?
20MnCr5 is used for case-hardened mechanical components such as gears, shafts, pins, and automotive parts that demand high wear resistance and good fatigue strength.
❓ How hard can 20MnCr5 get after carburizing?
It can achieve a surface hardness of 58–62 HRC, with a case depth typically between 0.8 mm to 2.5 mm depending on heat treatment.
❓ What’s the difference between 16MnCr5 and 20MnCr5?
20MnCr5 has a higher carbon and chromium content than 16MnCr5, offering deeper case depth and better hardenability, making it more suitable for high-load applications.
❓ Is 20MnCr5 alloy steel weldable?
Yes, in its annealed or normalized state. However, components that have been case-hardened require special precautions during welding.
🔚 Conclusion
20MnCr5 alloy steel is a premium-grade, case-hardening steel that delivers a powerful combination of surface wear resistance and core toughness. Its machinability, deep case hardening capabilities, and high tensile strength make it an industry favorite for gears, shafts, and automotive components.
As a trusted 20MnCr5 supplier in India, we ensure top-quality material, customization, and timely delivery for all your alloy steel needs.
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