20XH24A
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Product Description:
20XH24A is a medium-carbon alloy steel commonly used in the production of mechanical components that require moderate strength, toughness, and wear resistance. This steel is primarily used in industries such as automotive, machinery, and construction, where good mechanical properties are essential, but extremely high-strength or specialized alloying elements are not needed.
The alloy combines carbon, manganese, and other elements to offer a balance between strength and machinability. 20XH24A is often used for parts such as shafts, gears, bolts, and structural components that need to endure medium-to-high mechanical loads while maintaining good durability and toughness.
Features:
- Good Strength: 20XH24A provides a moderate level of tensile strength and yield strength, making it suitable for many mechanical applications.
- Good Toughness: It offers a good balance between strength and toughness, allowing it to perform well under moderate stress and impact conditions.
- Machinability: The steel has good machinability, making it easier to fabricate into the required shapes and sizes for various components.
- Wear Resistance: It offers reasonable wear resistance, suitable for applications exposed to moderate friction and wear.
- Weldability: 20XH24A has reasonable weldability, but preheating and post-weld heat treatment may be necessary to avoid cracking in thicker sections.
- Corrosion Resistance: It offers limited corrosion resistance and is typically used in environments where corrosion is not the primary concern.
Specifications:
- GOST 1050-88: A Russian standard that includes 20XH24A, which specifies the properties and applications of this steel.
- ISO 683-1: An international standard that outlines requirements for low-alloy steel used in general mechanical applications, which includes 20XH24A.
- DIN EN 10083-1: European standard for steel materials used in machinery and structural applications, covering steels like 20XH24A.
Composition of 20XH24A Steel:
| Element | Percentage |
|---|---|
| Carbon (C) | 0.18 – 0.25% |
| Manganese (Mn) | 0.60 – 0.90% |
| Silicon (Si) | 0.15 – 0.40% |
| Chromium (Cr) | 0.50% Max |
| Nickel (Ni) | 0.50% Max |
| Phosphorus (P) | 0.035% Max |
| Sulfur (S) | 0.035% Max |
| Iron (Fe) | Balance |
Physical Properties:
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1450°C (2642°F) |
| Hardness (Brinell) | 160-210 HB |
| Tensile Strength | 600-850 MPa (87,000-123,000 psi) |
| Yield Strength | 400-600 MPa (58,000-87,000 psi) |
| Elongation | 15-20% |
| Modulus of Elasticity | 210 GPa |
| Thermal Conductivity | 46 W/m·K |
| Coefficient of Thermal Expansion | 11.5 × 10⁻⁶ /°C |