Description
20MnCr5 Steel Overview:
20MnCr5 is a low-alloy case-hardening steel known for its excellent wear resistance, surface hardness, and robust core strength. After case hardening, it attains a core tensile strength of 1000–1300 N/mm², making it ideal for high-strength applications that require durable and long-lasting parts.
Applications of 20MnCr5: 20MnCr5 is used in various mechanical components such as:
- Gearing in rotating machinery
- Valve bodies
- Pump components
- High-load wheels and fittings
- Bolts, gears, shafts, and transmission parts in automotive and railway industries
- Mining machinery and equipment
- Internal combustion engine components
- Tools and agricultural machinery parts
Equivalent Grades:
- ASTM A29/A29M
- DIN EN 10083/3
- JIS G4053
- DIN17210
Additional Grades: Common steel grades with similar properties include:
- EN1A, EN3B, EN8, EN31, EN36C, 42CrMo4, H13, SAE4140, and many others used for different mechanical and engineering applications.
Chemical Composition of 20MnCr5:
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.17–0.22 |
| Silicon (Si) | ≤ 0.40 |
| Manganese (Mn) | 1.10–1.40 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 1.00–1.30 |
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile Strength | 520 MPa |
| Yield Strength | 415 MPa (min) |
| Bulk Modulus | 140 GPa |
| Shear Modulus | 80 GPa |
| Poisson’s Ratio | 0.27–0.30 |
| Thermal Conductivity | 46.6 W/mK |
Hardness:
- 218 HB (Brinell hardness)
Heat Treatment Information:
- Hardening Temperature: 780–820°C
- Tempering Temperature: 150–200°C (at least twice)
- Stress Relieving Temperature: 550–600°C
- Normalizing Temperature: 850–880°C (air cool)
- Annealing Temperature: 650–700°C
- Hot Forming Temperature: 1100–850°C
Physical Properties:
- Density: 7.7–8.03 g/cm³
- Thermal Conductivity at Different Temperatures:
- At 20°C: 11.7 W/(m*K)
- At 350°C: 12.8 W/(m*K)
- At 700°C: 13.5 W/(m*K)
Weldability and Machinability: 20MnCr5 offers good machinability and hardenability but has relatively poor weldability due to its carbon and chromium content. It is recommended to use specialized welding procedures when joining 20MnCr5 components.
Forging and Machining: The material can be hot forged at temperatures between 1100°C and 850°C. After forging, proper heat treatment processes should be employed to achieve desired mechanical properties.
Supply Cities:
Mumbai Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Visakhapatnam, Kochi, Kerala, Hubli-Dharwad, Karnataka, Ghaziabad Kolkata.
