Alloy F255 Steel (UNS S32760)
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Alloy F255 (ASTM A182/ ASTM A240/ ASTM A276)
Alloy F255 is a super duplex stainless steel known for its excellent corrosion resistance, high mechanical strength, and outstanding performance in harsh environments. It offers superior resistance to pitting, crevice corrosion, and stress corrosion cracking, making it ideal for applications in chloride-rich and aggressive environments.
Features of Alloy F255:
- Exceptional Corrosion Resistance: Performs well in aggressive environments, including seawater and chemical processing.
- High Strength: Twice the yield strength of standard austenitic stainless steels like 304 and 316.
- Stress Corrosion Cracking Resistance: Excellent performance in chloride environments.
- Good Weldability: Suitable for welding without post-weld heat treatment
- Durable at High Temperatures: Maintains properties in elevated temperature environments.
Specifications:
Applicable Standards:
- ASTM A182, ASTM A240, ASTM A276
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile Strength | ~725 MPa |
| Yield Strength | ~485 MPa |
| Elongation | ~25% |
| Hardness (BHN) | ~310 |
| Density | ~7.8 g/cm³ |
Thermal Properties:
- Melting Range: 1350-1400°C
Chemical Composition:
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | ~24.0-26.0 |
| Nickel (Ni) | ~4.5-6.5 |
| Molybdenum (Mo) | ~3.0-4.0 |
| Nitrogen (N) | ~0.20-0.25 |
| Carbon (C) | ≤0.03 |
| Silicon (Si) | ≤1.0 |
| Manganese (Mn) | ≤1.0 |