Alloy 2304 Steel (UNS S32304)
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Alloy 2304 Duplex Stainless Steel (ASTM A240, ASTM A276)
Alloy 2304 is a duplex stainless steel combining high corrosion resistance with superior mechanical strength. With a balanced structure of ferrite and austenite, it provides outstanding stress corrosion cracking resistance, making it ideal for applications in mildly to moderately aggressive environments. It serves as a cost-effective and high-performance alternative to traditional austenitic grades like 304 and 316.
Features of Alloy 2304:
- Corrosion Resistance: Excellent resistance to general corrosion, pitting, and crevice corrosion in chloride-rich and oxidizing environments.
- Mechanical Strength: Yield strength is approximately twice that of austenitic grades such as 304 and 316.
- Stress Corrosion Cracking: Superior resistance compared to standard stainless steels, particularly in chloride environments.
- Cost Efficiency: Low nickel and molybdenum content reduces material costs while maintaining excellent performance.
- Low-Temperature Toughness: oHigh toughness and ductility even in sub-zero conditions.
Specifications:
Applicable Standards:
- ASTM A240
- ASTM A276
- UNS S32304
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile Strength | ~620 MPa |
| Yield Strength | ~450 MPa |
| Elongation | 25% |
| Hardness (BHN) | ~230 |
| Density | 7.8 g/cm³ |
Chemical Composition:
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 22.0-24.0 |
| Nickel (Ni) | 3.5-5.5 |
| Molybdenum (Mo) | ≤0.6 |
| Nitrogen (N) | 0.05-0.20 |
| Carbon (C) | ≤0.03 |
| Silicon (Si) | ≤1.0 |
| Manganese (Mn) | ≤2.5 |
| Sulfur (S) | ≤0.020 |
| Phosphorus (P) | ≤0.030 |