15-5PH Stainless Steel (UNS S15500)
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15-5 PH (ASTM A564/ AMS 5659)
Precipitation Hardening Stainless Steel
Alloy 15-5 PH is a precipitation-hardening stainless steel known for its high strength, good corrosion resistance, and excellent fatigue resistance. It is designed for applications that require high mechanical properties, toughness, and good performance in aggressive environments, making it ideal for aerospace, chemical, and high-performance structural applications.
Features of 15-5 PH :
- High Strength and Toughness: Offers high tensile strength and good toughness, especially after precipitation hardening.
- Corrosion Resistance: Good resistance to general corrosion, pitting, and stress corrosion cracking in various environments, including chemicals and marine conditions.
- Fatigue Resistance: Excellent resistance to fatigue, making it ideal for components subjected to cyclic stress.
- Weldability: Good weldability without significant loss of mechanical properties, making it suitable for complex fabrication.
- Heat Treatable: Achieves high strength levels through precipitation hardening, providing an ideal balance of strength and toughness.
Specifications of Alloy 15-5 PH:
Applicable Standards:
- ASTM A564, AMS 5659, UNS S15500
Typical Mechanical Properties (Heat Treated):
| Property | Value |
|---|---|
| Tensile Strength | ~1300 MPa |
| Yield Strength | ~1100 MPa |
| Elongation | ~10-12% |
| Hardness (HRC) | 40-45 HRC |
| Density | 7.80 g/cm³ |
Thermal Properties:
- Melting Range: 1375-1415°C
Chemical Composition:
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 14.0-15.5 |
| Nickel (Ni) | 3.5-5.5 |
| Molybdenum (Mo) | 3.0-4.0 |
| Copper (Cu) | 2.5-4.5 |
| Carbon (C) | 0.05-0.15 |
| Manganese (Mn) | 1.0-2.0 |
| Silicon (Si) | ≤1.0 |
| Phosphorus (P) | ≤0.04 |
| Sulfur (S) | ≤0.03 |