Product Parameters
Alloy Structure Seamless Steel Pipes
Material and Specification
38CrMoAl is an alloy structural steel with high surface hardness, wear resistance, and fatigue strength. GB/T 3077 specifies the requirements for this alloy structural steel, including chemical composition, mechanical properties, and physical properties.
Key Features
High strength
Strong toughness
Excellent wear resistance
High surface hardness
Chemical Composition
The chemical composition of GB/T 3077 38CrMoAl alloy structure seamless steel pipes is as follows:
| Element | Composition (%) |
| C | 0.35-0.42 |
| Si | 0.20-0.50 |
| Mn | 0.30-0.60 |
| Cr | 1.35-1.65 |
| Mo | 0.15-0.25 |
| Al | 0.70-1.10 |
Mechanical Properties
The mechanical properties of GB/T 3077 38CrMoAl alloy structure seamless steel pipes are outlined in the table below:
| Property | Value |
| Tensile strength | 980-1180 MPa |
| Yield strength | 785 MPa |
| Elongation | 11% |
| Reduction of area | 45% |
| Impact toughness | 78-98 J/cm² |
Physical Properties
The physical properties of GB/T 3077 38CrMoAl alloy structure seamless steel pipes are as follows:
| Property | Value |
| Density | 7.85 g/cm³ |
| Melting point | 1420°C |
| Thermal conductivity | 42.7 W/m·K |
Process Performance
GB/T 3077 38CrMoAl alloy structural seamless steel pipe has excellent processing properties, including good weldability and machinability. The material is easy to heat treat to obtain the required mechanical properties, and after surface treatment such as nitriding, the wear resistance and hardness can be further improved.
Steel Grade and Application
The superior wear, heat, and corrosion resistance of 38CrMoAl steel makes it ideal for a wide range of mechanical components, including gears, shafts, and heavy-duty machinery parts. Its high strength and toughness are perfect for applications demanding high stress and abrasion resistance.
Possible Alternative Grades
In some cases, alternative grades that can be considered as substitutes for 38CrMoAl include 40Cr, 42CrMo, and 35CrMo. These grades offer similar properties and may be used as alternatives based on specific application requirements.
In conclusion, GB/T 3077 38CrMoAl alloy structure seamless steel pipes offer a combination of high strength, toughness, and excellent process performance, making them suitable for a wide range of industrial applications.
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