15-5PH Stainless Steel
Yunming Metal supplies 15-5PH stainless steel bar, plate, and forged shapes for aerospace, marine, and nuclear applications. Known for its superior strength, corrosion resistance, and excellent toughness in all directions, including large cross-sections.
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Product Overview
15-5PH stainless steel (UNS S15500) is a precipitation hardening martensitic stainless steel with excellent mechanical strength, toughness, and corrosion resistance. It was developed as an improvement over 17-4PH, offering better transverse properties, especially in bar and forged shapes. Ideal for demanding aerospace and nuclear applications, it maintains good weldability and high strength even in large sections.
Application Areas
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Aerospace structural and engine components
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Nuclear reactor parts
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High-performance shafts and rotors
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Marine propulsion and fasteners
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Valve components, flanges, and pump housings
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Petrochemical processing equipment
Product Features
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Improved toughness vs. 17-4PH, especially in larger cross-sections
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High yield and tensile strength after aging
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Excellent corrosion resistance in various environments
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Readily machinable and weldable
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Available in multiple aging tempers (H900–H1150)
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Good dimensional stability during heat treatment
Technical Specifications
| Condition | Diameter / Thickness | Width (mm / in) | Length (mm / in) | Hardness |
|---|---|---|---|---|
| Annealed | 8–300 mm / ⁵⁄₁₆″–11 ⁷⁄₈″ | up to 2000 mm / 78 ³⁄₄″ | up to 6000 mm / 236 ¹⁄₄″ | ≤ 341 HB |
| H1025 | 8–250 mm / ⁵⁄₁₆″–9 ⁷⁸″ | up to 1800 mm / 70 ⁷⁄₈″ | up to 6000 mm / 236 ¹⁄₄″ | 32–38 HRC |
| H1100 | 8–250 mm / ⁵⁄₁₆″–9 ⁷⁸″ | up to 1800 mm / 70 ⁷⁄₈″ | up to 6000 mm / 236 ¹⁄₄″ | 28–34 HRC |
Manufacturing Process
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Vacuum or ESR melting
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Hot rolling or forging
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Solution annealing
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Aging heat treatment (H900–H1150)
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Straightening, machining, and polishing
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Final inspection and certification
FAQ
Q1: What is the main difference between 15-5PH and 17-4PH?
A: 15-5PH offers better transverse toughness and improved ductility, especially in thicker sections or forged parts.
Q2: Is 15-5PH suitable for welding?
A: Yes, it has good weldability and can be heat-treated after welding to regain full strength.
Q3: What are common aging conditions for 15-5PH?
A: H900, H1025, H1100, and H1150 are widely used, depending on the strength and ductility required.
Q4: What product forms are available?
A: 15-5PH is available in round bar, forged blocks, plates, and machined components.
Q5: Can 15-5PH be used in seawater environments?
A: Yes, its corrosion resistance is suitable for marine hardware and offshore structures, especially after aging.
Still Have Questions?
Feel free to contact us for more details or to discuss your 15-5PH stainless steel application.
Our technical team is ready to assist with sizing, certifications, and export logistics.
