Description
15CrMoV12 Alloy Steel: Comprehensive Overview
15CrMoV12 is a high-performance alloy steel characterized by its excellent hardenability, high strength, and good wear resistance. This steel is used in various demanding applications where strength and durability are critical. Its composition and properties make it suitable for high-stress components, particularly in the automotive and industrial sectors.
15CrMoV12 Grade Introduction
15CrMoV12 is designed to provide high mechanical properties and resistance to wear and deformation. The alloy’s chromium, molybdenum, and vanadium content enhances its hardenability and wear resistance, making it suitable for use in high-load conditions.
Chemical Composition
The chemical composition of 15CrMoV12 is optimized to balance hardness, strength, and toughness:
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.12 – 0.18 |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 1.20 – 1.40 |
| Molybdenum (Mo) | 0.10 – 0.30 |
| Vanadium (V) | 0.05 – 0.15 |
| Silicon (Si) | 0.15 – 0.35 |
Mechanical Properties
15CrMoV12 exhibits robust mechanical properties suitable for high-stress applications:
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 800 |
| Yield Strength (MPa) | ≥ 650 |
| Elongation Rate (%) | ≥ 12 |
| Impact Toughness (J/cm²) | ≥ 50 |
| Hardness (HB) | 180 – 220 HB |
Hardness
The typical hardness range for 15CrMoV12 is between 180 and 220 HB. This range ensures the steel’s capability to withstand wear and impact in demanding applications.
Heat Treatment
To achieve optimal properties, 15CrMoV12 undergoes several heat treatment processes:
- Hardening:
- Heating: Heat to 850-900°C.
- Quenching: Usually done in oil or water to achieve the desired hardness.
- Tempering: Performed at 500-600°C to relieve stresses and enhance toughness.
Physical Properties
The physical properties of 15CrMoV12 are as follows:
| Property | Value |
|---|---|
| Modulus of Elasticity (N/mm²) | 210 × 10³ |
| Density (g/cm³) | 7.85 |
| Thermal Conductivity (W/m.K) | 20.0 |
Thermal Properties
- Thermal Conductivity: 20.0 W/m.K
Forging Properties
15CrMoV12 can be hot-formed within the temperature range of 1100°C to 850°C.
Stress Relieving
Stress relief heat treatment is performed after cold working to reduce internal stresses and improve dimensional stability.
Normalizing
Normalizing is carried out at 850-900°C, followed by air cooling to refine the microstructure and enhance mechanical properties.
Annealing
Annealing is performed at 850-900°C, followed by slow furnace cooling to relieve stress and improve machinability.
Welding
15CrMoV12 has good weldability, although preheating and post-weld heat treatment are recommended to prevent potential issues such as cracking due to its alloy content.
Equivalent Grades
15CrMoV12 is comparable to several other alloy steel grades, which can be used depending on specific requirements and standards:
| Standard | Equivalent Grade |
|---|---|
| GB | 15CrMoV12 |
| JIS | SCM420 |
| ASTM | 4140 |
| DIN | 1.7225 |
Applications
15CrMoV12 is used in various demanding applications due to its high strength and wear resistance:
- Automotive: Components such as gears, shafts, and high-stress parts.
- Industrial Machinery: High-load components requiring durability and wear resistance.
- Tooling: Parts in tools that are subjected to high wear and impact.
- Forgings: General engineering forgings that demand high 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.
