Description
45CrNiMoV12 Steel Introduction:
45CrNiMoV12 is a high-strength alloy steel known for its exceptional toughness, high hardenability, and resistance to fatigue. This steel contains chromium (Cr), nickel (Ni), molybdenum (Mo), and vanadium (V), which together provide excellent mechanical properties. It is particularly suited for manufacturing heavy-duty components requiring high strength, toughness, and resistance to wear and impact, even under extreme conditions. 45CrNiMoV12 is commonly used in the aerospace, defense, and energy sectors.
45CrNiMoV12 Grade Applications:
45CrNiMoV12 is often used in applications where high wear resistance, strength, and toughness are critical. Common components include:
- Heavy-duty shafts
- Gears and gear shafts
- Turbine blades and rotors
- Structural components in aerospace and defense industries
- Large bolts and fasteners
- Crankshafts
- High-stress machine parts
Equivalent Grades:
- DIN: 1.2714 (similar composition)
- AISI: L6 (similar but with slight differences)
- JIS: SKT4 (comparable but may differ in specific properties)
Chemical Composition:
| Element | Content (%) |
|---|---|
| C | 0.40-0.50 |
| Mn | 0.25-0.50 |
| P | ≤ 0.030 |
| S | ≤ 0.030 |
| Cr | 2.00-2.50 |
| Ni | 1.00-1.50 |
| Mo | 0.30-0.60 |
| V | 0.10-0.20 |
| Si | 0.20-0.50 |
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile strength (MPa) | 1000-1200 |
| Yield strength (MPa) | ≥ 850 |
| Elongation rate (%) | ≥ 10 |
| Reduction of area (%) | ≥ 40 |
| Impact energy (J) | ≥ 50 |
| Hardness (HB) | 285-321 (annealed) |
45CrNiMoV12 Hardness:
In its annealed state, the hardness typically ranges from 285 to 321 HB. After quenching and tempering, the surface hardness can be increased significantly, with values reaching up to 50-55 HRC depending on the heat treatment process.
Heat Treatment:
45CrNiMoV12 can undergo various heat treatment processes to achieve optimal strength and hardness. Typical treatments include quenching, tempering, and annealing.
Hardening Process:
- Heating for hardening: Heat the material to 850-880°C, followed by quenching in oil or water.
- Tempering: After quenching, tempering is performed at 500-700°C to enhance toughness while maintaining high strength.
Annealing: Annealing is performed at 800-850°C, followed by slow furnace cooling. This softens the material and improves its machinability.
Physical Properties:
| Property | Value |
|---|---|
| Modulus of Elasticity (N/mm²) | 210 × 10³ |
| Density (g/cm³) | 7.85 |
| Thermal Conductivity (W/m.K) | 30.0 |
Thermal Properties:
- Thermal conductivity: 30.0 W/m.K at room temperature.
- Specific heat: 460 J/kg-K.
Forging Properties:
Forging is performed at temperatures between 1100°C and 900°C. After forging, it is recommended to allow the material to cool slowly to avoid cracking and internal stress.
Normalizing:
Normalization is conducted at 850-900°C, followed by air cooling. This process refines the grain structure and improves the material’s toughness and strength.
Welding:
45CrNiMoV12 has moderate weldability, but preheating and post-weld heat treatment are recommended for thick sections to avoid cracking. Stress relief may also be required after welding to ensure stability.
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.
