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Description
Chemical Composition and Mechanical Properties of 30CrMo Alloy Steel
Chemical Composition:
| Element | Percentage |
|---|---|
| Carbon (C) | 0.26 – 0.34% |
| Silicon (Si) | 0.17 – 0.37% |
| Manganese (Mn) | 0.40 – 0.70% |
| Chromium (Cr) | 0.80 – 1.10% |
| Molybdenum (Mo) | 0.15 – 0.25% |
| Nickel (Ni) | ≤0.30% |
| Phosphorus (P) | ≤0.035% |
| Sulfur (S) | ≤0.035% |
Mechanical Properties:
| Property | Value |
|---|---|
| Yield Strength (min) | ≥785 MPa |
| Tensile Strength (min) | ≥980 MPa |
| Elongation (min) | ≥10% |
| Hardness (Brinell) | ≤269 HB |
Applications and Industries Utilizing 30CrMo Alloy Steel Plates
30CrMo alloy steel is used in various industries due to its high strength and toughness:
- Engineering and Machinery: Shafts, spindles, gears, and high-load components.
- Chemical Industry: Equipment for high-pressure environments, including pipes and fittings.
- Oil and Gas: Components in drilling equipment and pipelines.
- Automotive: Manufacturing of high-strength fasteners and structural components.
- Aerospace: Parts that require high strength-to-weight ratios.
Corrosion Resistance and Performance Characteristics
- Corrosion Resistance: Good resistance to oxidation at temperatures below 500°C, but performance decreases significantly above this temperature.
- Thermal Strength: Maintains good strength at elevated temperatures up to approximately 500°C.
- Weldability: Generally good weldability, but preheating is recommended when alloy elements are near the upper limit.
Manufacturing Process and Available Dimensions
Manufacturing Process:
- Typically produced through hot rolling or forging processes, followed by heat treatment for enhanced mechanical properties.
Available Dimensions:
| Thickness Range | Width Range | Length Range |
|---|---|---|
| 3 – 250 mm | 1220 – 4200 mm | 5000 – 18000 mm |
Welding and Fabrication Considerations for 30CrMo Alloy Steel
- Welding Techniques: Can be welded using standard methods; however, preheating to above 175°C is recommended when alloy content is at the upper limit.
- Post-Weld Treatment: May require post-weld heat treatment depending on the application.
Comparison of 30CrMo with Other Alloy Steel Grades
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Equivalent Grades |
|---|---|---|---|
| 30CrMo | ≥785 | ≥980 | ASTM A29/A29M AISI SAE4130, JIS SCM430 |
At HL Steel Company, we provide high-quality GB/T 11251 30CrMo alloy steel plates tailored for various industrial applications, ensuring optimal performance and reliability in demanding environments.
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