Precipitation Hardening Stainless Steel
Precipitation hardening stainless steel includes grades like 17-4PH and 15-5PH, offering high strength, good corrosion resistance, and excellent dimensional stability for aerospace, precision parts, and medical applications.
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Product Overview
Precipitation hardening stainless steel, also known as PH stainless steel, offers an exceptional combination of high strength, hardness, and corrosion resistance. This type of steel is ideal for applications where both mechanical performance and corrosion protection are critical, particularly after heat treatment. Its ability to achieve superior mechanical properties through aging processes makes it a top choice in demanding industries such as aerospace, petrochemical, and precision components manufacturing.
Application Areas
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Aerospace structural components
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High-performance shafts and fasteners
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Nuclear and chemical processing equipment
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Marine hardware and offshore platforms
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Valves, flanges, and high-strength pipe fittings
Product Features
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Excellent strength-to-weight ratio
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Superior mechanical strength after heat treatment
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Resistance to stress corrosion cracking and fatigue
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Good weldability and formability
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Suitable for both annealed and aged conditions
Technical Specifications
| Grade | Diameter / Thickness | Width (mm / in) | Length (mm / in) | Condition |
|---|---|---|---|---|
| 17-4PH | 8–300 mm / ⁵⁄₁₆″–11 ⁷⁄₈″ | up to 2000 mm / 78 ³⁄₄″ | up to 6000 mm / 236 ¹⁄₄″ | Annealed / H900–H1150 |
| 15-5PH | 8–250 mm / ⁵⁄₁₆″–9 ⁷⁸″ | up to 1800 mm / 70 ⁷⁄₈″ | up to 6000 mm / 236 ¹⁄₄″ | Annealed / H1025–H1150 |
Custom sizes and tolerances available upon request.
Manufacturing Process
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Raw material melting (VIM + ESR optional)
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Hot rolling / forging
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Solution annealing
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Precision machining
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Aging heat treatment (H900, H1025, H1150, etc.)
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Final inspection and packaging
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FAQ
Q1: What is the main benefit of precipitation hardening stainless steel?
A: It provides high strength and corrosion resistance while allowing heat treatment flexibility to adjust hardness.
Q2: What are common grades in this category?
A: 17-4PH and 15-5PH are the most widely used grades.
Q3: Is it weldable?
A: Yes, PH stainless steels are generally weldable using standard processes, with post-weld heat treatment recommended.
Q4: Can it be used in seawater environments?
A: Yes, especially in aged condition, it offers reliable corrosion resistance in marine and offshore applications.
Q5: What is the difference between 17-4PH and 15-5PH?
A: 15-5PH has better transverse toughness and is more suitable for critical aerospace and nuclear components.
Still Have Questions?
Contact us for technical advice or quote on precipitation hardening stainless steel materials. We support standard and custom requirements with full certification and rapid delivery.
