Description
50CrMoV4 Steel Introduction:
50CrMoV4 is a high-strength alloy steel that features a combination of chromium (Cr), molybdenum (Mo), and vanadium (V) as its main alloying elements. This alloy steel is known for its excellent mechanical properties, including high tensile strength, toughness, and fatigue resistance. The presence of chromium and molybdenum enhances hardenability, while vanadium improves wear resistance and toughness. 50CrMoV4 is often used for manufacturing components subjected to high dynamic loads, making it a preferred material in the automotive, aerospace, and machinery industries.
50CrMoV4 Grade Applications:
50CrMoV4 is used for parts that require high strength, toughness, and wear resistance. Typical applications include:
- Heavy-duty springs (e.g., automotive suspension springs)
- Gears and shafts
- Connecting rods
- Heavy-duty fasteners
- Crankshafts
- High-stress machine components
Equivalent Grades:
- DIN: 1.7701
- AISI/SAE: 6150 (similar but with slight variations)
- JIS: SCM445 (comparable but may differ slightly)
Chemical Composition:
| Element | Content (%) |
|---|---|
| C | 0.46-0.54 |
| Mn | 0.60-0.90 |
| P | ≤ 0.025 |
| S | ≤ 0.035 |
| Cr | 0.90-1.20 |
| Mo | 0.15-0.30 |
| V | 0.10-0.20 |
| Si | 0.15-0.40 |
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile strength (MPa) | 950-1200 |
| Yield strength (MPa) | ≥ 835 |
| Elongation rate (%) | ≥ 12 |
| Reduction of area (%) | ≥ 45 |
| Impact energy (J) | ≥ 40 |
| Hardness (HB) | 248-302 (annealed) |
50CrMoV4 Hardness:
In its annealed condition, the hardness typically ranges from 248 to 302 HB. After quenching and tempering, the hardness can increase significantly to 42-48 HRC, depending on the specific heat treatment applied.
Heat Treatment:
50CrMoV4 can be heat-treated through quenching and tempering to achieve optimal mechanical properties.
Hardening Process:
- Heating for hardening: Heat the steel to 850-900°C, followed by quenching in oil or water.
- Tempering: Tempering is carried out at 500-700°C depending on the desired balance between strength and toughness.
Physical Properties:
| Property | Value |
|---|---|
| Modulus of Elasticity (N/mm²) | 210 × 10³ |
| Density (g/cm³) | 7.80 |
| Thermal Conductivity (W/m.K) | 42.0 |
Thermal Properties:
- Thermal conductivity: 42.0 W/m.K at room temperature.
- Specific heat: 460 J/kg-K.
Forging Properties:
Forging should be carried out at temperatures between 1100°C and 900°C. After forging, the steel should be cooled slowly to avoid internal stress or cracking.
Normalizing:
Normalizing is performed by heating the material to 850-900°C, followed by air cooling. This process refines the grain structure and enhances the toughness and strength of the steel.
Annealing:
Annealing is carried out at 820-850°C, followed by slow cooling in the furnace. This softens the material, making it easier to machine and improving its ductility.
Welding:
50CrMoV4 steel can be welded, but preheating is required for thicker sections to avoid cracking. Post-weld heat treatment, such as stress relieving, is often necessary to ensure dimensional stability and reduce internal stresses.
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.
