Description
46CrMo4 Grade Introduction
46CrMo4 is a high-strength, low-alloy steel renowned for its excellent hardenability, temper resistance, and good machinability. Known for its superior wear resistance and cold plastic strain capacity, 46CrMo4 is often used in high-load applications that require durability and toughness. This grade is ideal for parts like gears, shafts, and high-pressure pipes, and it is commonly utilized in carburized structural steel applications due to its ability to be hardened and tempered effectively.
46CrMo4 Grade Applications
46CrMo4 is widely employed in a variety of demanding engineering applications. Some common uses include:
- Gears and Cogwheels: Due to its high wear resistance and strength.
- Shafts: Where high tensile strength and toughness are required.
- High-Pressure Pipes: For its excellent mechanical properties and ability to withstand high stresses.
- Forgings: Particularly in the general engineering sector, where customized dimensions are often needed.
This steel grade is available in various sizes and can be customized according to specific application requirements.
Equivalent Grades
46CrMo4 is comparable to several other steel grades, which may be used interchangeably depending on the standards and requirements:
| Standard | Equivalent Grade |
|---|---|
| GB | 42CrMo4 |
| JIS | SCM440 |
| ASTM | 4140 |
| DIN | 1.7225 |
Chemical Composition
The chemical composition of 46CrMo4 is as follows:
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.42 – 0.50 |
| Manganese (Mn) | 0.60 – 0.90 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 0.90 – 1.20 |
| Molybdenum (Mo) | 0.15 – 0.30 |
| Nickel (Ni) | ≤ 0.025 |
| Copper (Cu) | ≤ 0.20 |
| Silicon (Si) | 0.15 – 0.35 |
Mechanical Properties
46CrMo4 offers robust mechanical properties suitable for high-stress applications:
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 850 |
| Yield Strength (MPa) | ≥ 690 |
| Elongation Rate (%) | ≥ 12 |
| Section Shrinkage (%) | ≥ 50 |
| Impact Energy (J) | ≥ 75 |
| Impact Toughness (J/cm²) | ≥ 85 |
| Hardness (HB) | 207 – 248 HB |
Hardness
46CrMo4 typically achieves a hardness range between 207 and 248 HB.
Heat Treatment
46CrMo4 undergoes several heat treatment processes to achieve its desired mechanical properties:
- Hardening:
- 1st Oil Cooling: Heat to 850-900°C.
- 2nd Oil Cooling: Heat to 800-850°C.
- Tempering: Conducted at 150-200°C, followed by air cooling.
Physical Properties
The physical properties of 46CrMo4 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
46CrMo4 can be hot-formed within the temperature range of 1100°C to 850°C.
Stress Relieving
Stress relief heat treatment is performed after cold drawing in a controlled atmosphere to reduce internal stresses.
Normalizing
Normalize 46CrMo4 steel at 850-900°C with air cooling to refine the grain structure and enhance mechanical properties.
Annealing
Annealing is conducted at 850°C, followed by furnace cooling to improve machinability and relieve stress.
Welding
46CrMo4 demonstrates good weldability and machinability, making it suitable for various manufacturing processes, including welding.
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.
