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:
Gears and gear shafts
Transmission components
Camshafts and crankshafts
Steering components
Pins, bushings, and rollers
Agricultural machinery parts
Automotive and industrial equipment
It is ideal for carburizing and case hardening applications due to its structure and alloying elements.
🔧 Machinability, Weldability & Heat Treatment
Machinability: Good in normalized or annealed condition.
Weldability: Moderate – Preheating and post-weld stress relieving recommended.
Heat Treatment:
Carburizing: 870–950°C
Hardening: Oil quench at 780–820°C after carburizing
Tempering: 150–200°C to reduce stresses without affecting case hardness
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:
Bright Bars: Drawn, Peeled, Ground
Hot Rolled Bars: Rounds, Squares, Flats
Custom Profiles: Round-corner squares, hex bars, D-shaped bars, and more
Available Sizes:
Rounds: 12 mm to 90 mm
Custom shapes: As per customer drawings
Tolerances: ISO H9, H10, H11 or customer-specified
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?
Consistent quality from VD route steel (on request)
Small batch or bulk availability
Custom sizes, lengths, and shapes as per drawing
Support for OEMs, machinists, and exporters
In-house QC and NABL-certified lab tie-ups
Competitive pricing and reliable delivery schedules
📜 Certifications & Compliance
Supplied with Test Certificate (TC) indicating heat number and analysis
Complies with IS 4432, IS 5517, EN 10084, and customer-specific requirements
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.
