Description
15CrNi6 Alloy Steel Overview
15CrNi6 is a high-quality alloy steel known for its excellent mechanical properties, including high strength, toughness, and wear resistance. This steel grade combines chromium and nickel to enhance its durability and performance, making it suitable for critical engineering applications. It is widely used in industries where components are subjected to high stresses and require superior resistance to wear and fatigue.
Key Features of 15CrNi6:
- High Strength: Provides excellent load-bearing capabilities.
- Wear Resistance: Enhanced by alloying elements, making it suitable for components in abrasive environments.
- Toughness: Good impact resistance, crucial for applications involving dynamic loads.
- Versatility: Suitable for various applications in automotive, machinery, and engineering sectors.
Applications of 15CrNi6 Alloy Steel
15CrNi6 alloy steel is used in a range of high-performance applications due to its superior properties:
- Automotive Industry: Gear components, crankshafts, and camshafts that require high strength and wear resistance.
- Engineering: Structural components, heavy machinery parts, and components for high-load applications.
- Industrial Machinery: High-stress parts such as shafts, gears, and bearings.
- Aerospace: Components requiring high fatigue resistance and toughness.
Equivalent Grades for 15CrNi6
Various standards provide equivalent grades for 15CrNi6, ensuring compatibility across different regions and applications:
| Standard | Equivalent Grade |
|---|---|
| DIN | 1.5715 |
| BS | 817M40 |
| AISI/SAE | 4340 |
| UNS | G43400 |
| JIS | SNCM439 |
Chemical Composition of 15CrNi6
The chemical composition of 15CrNi6 determines its mechanical properties and performance characteristics. The typical composition is as follows:
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.13 – 0.18 |
| Silicon (Si) | 0.15 – 0.35 |
| Manganese (Mn) | 0.40 – 0.70 |
| Nickel (Ni) | 1.00 – 1.30 |
| Chromium (Cr) | 1.30 – 1.60 |
| Molybdenum (Mo) | 0.10 – 0.30 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
Mechanical Properties of 15CrNi6
The mechanical properties of 15CrNi6 are crucial for understanding its performance in various applications:
| Property | Value (Typical) |
|---|---|
| Tensile Strength (MPa) | 800 – 1050 |
| Yield Strength (MPa) | 650 |
| Elongation (%) | 10 – 15 |
| Impact Toughness (J) | 40 (at 20°C) |
| Hardness (HB) | 230 – 280 |
Heat Treatment of 15CrNi6
Heat treatment processes are essential for achieving the desired mechanical properties in 15CrNi6. The following processes are commonly used:
- Annealing: Heat to 850-900°C, hold until uniform, and cool slowly to improve machinability and relieve internal stresses.
- Hardening: Heat to 850-900°C, followed by quenching in oil or water to increase hardness and strength.
- Tempering: After hardening, temper at 500-650°C to reduce brittleness and enhance toughness.
Hardness of 15CrNi6
In its hardened and tempered condition, 15CrNi6 typically exhibits a hardness range of 230 – 280 HB. This range provides a good balance between hardness and toughness for demanding applications.
Physical Properties of 15CrNi6
The physical properties of 15CrNi6 are crucial for its application in various environments:
| Property | Value |
|---|---|
| Density (g/cm³) | 7.85 |
| Melting Point (°C) | 1425 |
| Thermal Conductivity (W/m·K) | 45 |
| Specific Heat Capacity (J/kg·K) | 460 |
Forging Properties of 15CrNi6
15CrNi6 can be forged at temperatures between 850 – 1150°C. After forging, it should be cooled slowly to avoid internal stresses and potential cracking.
Stress Relieving for 15CrNi6
To remove residual stresses from machining or deformation, stress relieving should be performed by heating to 550 – 650°C, holding for a sufficient period, and then cooling slowly.
Normalizing 15CrNi6
Normalizing involves heating to 830 – 870°C and air cooling. This process refines the grain structure and improves mechanical properties.
Annealing 15CrNi6
Annealing for 15CrNi6 requires heating to 830 – 870°C, holding at this temperature, and then slowly cooling in the furnace. This treatment improves machinability and relieves internal stresses.
Machinability of 15CrNi6
15CrNi6 exhibits good machinability in the normalized or annealed condition. For optimal results, use sharp cutting tools and appropriate machining parameters to enhance tool life and surface finish.
Welding of 15CrNi6
Welding of 15CrNi6 is feasible but requires careful handling to avoid potential issues. Preheat to 150 – 250°C to prevent cracking, and consider post-weld heat treatment to ensure the integrity of the weld.
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.
