15-5PH Precipitation-Hardening Stainless Steel Round Bar
Martensitic age-hardening stainless steel offering high strength and corrosion resistance, compliant with ASTM A564, AMS 5659, and other international standards.
- High Strength:Tensile strength up to 1310 MPa, yield strength 1170 MPa after heat treatment.
- Corrosion Resistance:Resists seawater and chloride erosion, comparable to 304 stainless steel.
- Thermal Stability:Short-term service up to 750°C; long-term use recommended ≤700°C.
- Processability:Supports performance tuning via solution treatment and age hardening.
Chemical Composition (wt%)
Element | Content (%) | Element | Content (%) |
C | ≤0.07 | Cr | 14.0-15.5 |
Si | ≤1.00 | Ni | 3.5-5.5 |
Mn | ≤1.00 | Cu | 2.5-4.5 |
P | ≤0.040 | Nb | 0.15-0.45 |
S | ≤0.030 | – | – |
1. Performance Characteristics
1.1 High Strength and Toughness
15-5PH is a precipitation-hardening martensitic stainless steel. After solution treatment and aging, it achieves a tensile strength exceeding 1200 MPa and a yield strength exceeding 1100 MPa. It also maintains excellent transverse toughness and ductility (elongation ≥ 40%), making it suitable for high-load applications.
1.2 Corrosion Resistance
Its high chromium (14-15.5%) and nickel (3.5-5.5%) composition imparts excellent oxidation resistance and chloride stress corrosion resistance. It is particularly stable in acidic and alkaline environments, with corrosion resistance comparable to that of 304 stainless steel.
1.3 Processing and Welding Properties
It exhibits excellent plasticity in the solution state, allowing for complex shapes to be formed through cold forming and conventional machining. Aging treatment after welding restores high strength, resulting in stable joint performance.
2. Main Applications
2.1 Aerospace
It is used in the manufacture of aircraft structural parts, engine components, and landing gear, meeting the requirements of lightweighting and high strength.
2.2 Medical Devices
Due to its biocompatibility and corrosion resistance, it is suitable for surgical instruments, implants, and medical device components.
2.3 Industrial Equipment
Used in valves and chemical containers in the petrochemical industry; processing equipment in the food industry requires corrosion resistance and compliance with hygiene standards.
2.4 Other Applications
Applications requiring high material strength and stability, such as automotive parts and precision instruments.
Surface Treatment
- Solution Treatment:Rapid cooling at 1040-1100°C to enhance toughness.
- Age Hardening:Heat preservation at 480-620°C to increase strength.
- Finishing:Options include polishing, turning, or pickling.
Why Choose Us ?
- Strict QC:Vacuum melting ensures compositional uniformity.
- Customization:Supports non-standard sizes (Ø10-300mm) and special heat treatments.
- Fast Delivery:Ample stock for standard specs, shipped within 72 hours.
Applications & Industries
Aerospace:
High-power density actuators.
Electronics:
Precision sensors & MEMS components.
Energy:
Magnetic coupling devices for turbines.
Frequently Asked Questions
Q1: Can it replace 17-4PH stainless steel?
A: Yes. 15-5PH offers superior transverse toughness for high-impact environments.
Q2: Is post-weld heat treatment required?
A: Solution treatment is recommended to restore properties.
Q3: Minimum order quantity (MOQ)?
A: 1 piece accepted. Sample service available.
Q4: Typical applications?
A: Aerospace components, surgical instruments, and nuclear reactor parts.
Q5: How to prevent hydrogen embrittlement?
A: Avoid acidic pickling; use low-hydrogen welding techniques.
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