20MnCr5 is a low-alloy case hardening steel known for its excellent wear resistance, core strength, and fatigue resistance. It is one of the most preferred grades for manufacturing components that need a tough core and hard, wear-resistant surface. At Steelmet Industries, we supply 20MnCr5 steel bars in various forms including hot rolled bars, bright bars, and custom profiles, with complete traceability and consistent quality.
📊 Chemical Composition of 20MnCr5 Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.17 – 0.22 |
| Manganese (Mn) | 1.10 – 1.40 |
| Chromium (Cr) | 1.00 – 1.30 |
| Silicon (Si) | 0.10 – 0.40 |
| Sulphur (S) | ≤ 0.035 |
| Phosphorus (P) | ≤ 0.035 |
🧪 Mechanical Properties (Typical Values After Case Hardening)
| Property | Value |
|---|---|
| Core Tensile Strength | 750 – 1000 MPa |
| Case Hardness | 58 – 62 HRC |
| Core Hardness | ~30–35 HRC |
| Elongation | 10 – 14% |
| Impact Resistance | Good (especially at the core) |
Final properties depend on heat treatment and case depth.
🔁 Equivalent Grades of 20MnCr5
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | 5120 |
| DIN / EN | 1.7147 |
| IS (India) | 20MnCr5 (IS 4432 / IS 5517) |
| JIS | SCM420H (similar) |
| BS | 805A20 (similar) |
⚙️ Applications of 20MnCr5 Steel
20MnCr5 is used in critical parts that require a hard, wear-resistant surface and a tough core:
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Gears and gear shafts
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Transmission components
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Camshafts and crankshafts
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Steering components
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Pins, bushings, and rollers
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Agricultural machinery parts
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Automotive and industrial equipment
It is ideal for carburizing and case hardening applications due to its structure and alloying elements.
🔧 Machinability, Weldability & Heat Treatment
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Machinability: Good in normalized or annealed condition.
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Weldability: Moderate – Preheating and post-weld stress relieving recommended.
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Heat Treatment:
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Carburizing: 870–950°C
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Hardening: Oil quench at 780–820°C after carburizing
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Tempering: 150–200°C to reduce stresses without affecting case hardness
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20MnCr5 is well-suited for deep case hardening applications with excellent wear resistance on the surface and toughness in the core.
🧱 20MnCr5 Steel Bars from Steelmet Industries
Steelmet Industries supplies 20MnCr5 steel bars in the following forms:
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Bright Bars: Drawn, Peeled, Ground
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Hot Rolled Bars: Rounds, Squares, Flats
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Custom Profiles: Round-corner squares, hex bars, D-shaped bars, and more
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Available Sizes:
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Rounds: 12 mm to 90 mm
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Custom shapes: As per customer drawings
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Tolerances: ISO H9, H10, H11 or customer-specified
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Supply Condition: As rolled, normalized, annealed, or case-hardened
Every bar is produced with tight tolerances, smooth surface finish, and full traceability.
🏭 Why Choose Steelmet Industries for 20MnCr5?
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Consistent quality from VD route steel (on request)
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Small batch or bulk availability
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Custom sizes, lengths, and shapes as per drawing
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Support for OEMs, machinists, and exporters
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In-house QC and NABL-certified lab tie-ups
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Competitive pricing and reliable delivery schedules
📜 Certifications & Compliance
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Supplied with Test Certificate (TC) indicating heat number and analysis
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Complies with IS 4432, IS 5517, EN 10084, and customer-specific requirements
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Optional: Third-party inspections (TPI), UT reports, NABL-certified test reports
📞 Enquire Now
Looking for high-quality 20MnCr5 steel bars with tight tolerances and full compliance?
📞 Contact Steelmet Industries today or send your enquiry online.
🔗 Website: https://www.steelmet.in
📩 Use the contact form to get in touch with our sales and technical team.