This article references the authoritative source “Encyclopedia of Metal Materials” to provide a detailed analysis of the performance characteristics and processing key points of 42CrMo. Structural steel is one of the most commonly used materials in mechanical manufacturing and construction engineering.
1. Basic Information of 42CrMo
42CrMo is a commonly used structural steel material with good comprehensive mechanical properties and machinability.
2. Chemical Composition (GB/T 3077)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.38-0.45 |
| Silicon (Si) | 0.17-0.37 |
| Manganese (Mn) | 0.50-0.80 |
| Chromium (Cr) | 0.90-1.20 |
| Molybdenum (Mo) | 0.15-0.25 |
| Phosphorus (P) | ≤0.035 |
| Sulfur (S) | ≤0.035 |
3. Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥600 MPa |
| Yield Strength | ≥355 MPa |
| Elongation | ≥16% |
| Hardness | ≤217 HB |
4. Heat Treatment Properties
Heat treatment characteristics of 42CrMo:
- Quenching and Tempering: Quenching + High-temperature Tempering
- Quenching Temperature: 820-860°C
- Tempering Temperature: 500-600°C
- Hardness after Quenching and Tempering: 25-32 HRC
5. Typical Applications
- Mechanical Manufacturing (Shafts, Gears)
- Automotive Industry (Transmission Parts)
- Construction Machinery (Connectors, Fasteners)
- Mold Manufacturing (Mold Bases, Plates)
- CNC Machined Parts (Precision Parts, Structural Components)
6. CNC Machining Performance
CNC machining characteristics of 42CrMo:
- Cutting Performance: Good
- Cutting Speed: 100-150 m/min
- Tool Selection: Carbide Tools
- Cooling: Requires adequate cooling
7. Procurement Guide
Market Price Reference:
- Plate: 6-10 RMB/kg
- Bar: 7-12 RMB/kg
- Pipe: 8-15 RMB/kg
8. Our Services
Dongguan Stirling Metal Products Co., Ltd. specializes in providing a One-Stop Service for 42CrMo material + CNC machining:
- ✅ Material Procurement: Genuine product guarantee, complete material certificates
- ✅ CNC Machining: Precision ±0.01mm, smooth surface finish
- ✅ Heat Treatment: Quenching and tempering, quenching, tempering
- ✅ Sample Production: Fast delivery in 3-5 days
- ✅ Mass Production: Delivery time 7-15 days
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