15-5PH Properties: An Overview
Introduction
15-5PH is a precipitation-hardening stainless steel alloy that exhibits high strength, corrosion resistance, and excellent fabricability. It is widely used in various industries, including aerospace, chemical processing, and power generation. In this article, we will discuss the properties of 15-5PH stainless steel alloy.
Chemical Composition
The chemical composition of 15-5PH stainless steel alloy is as follows:
- Carbon (C): 0.07 max
- Manganese (Mn): 1.00 max
- Phosphorus (P): 0.040 max
- Sulfur (S): 0.030 max
- Silicon (Si): 1.00 max
- Chromium (Cr): 14.00 - 15.50
- Nickel (Ni): 3.50 - 5.50
- Molybdenum (Mo): 2.50 - 3.50
- Columbium (Cb): 0.10 - 0.50
- Titanium (Ti): 0.50 max
Mechanical Properties
The mechanical properties of 15-5PH stainless steel alloy are as follows:
- Tensile Strength: 135,000 - 155,000 psi (930 - 1068 MPa)
- Yield Strength: 110,000 - 130,000 psi (758 - 896 MPa)
- Elongation: 10 - 15%
- Hardness: Rockwell C 32 - 40
- Density: 0.280 lb/in³ (7.76 g/cm³)
Physical Properties
The physical properties of 15-5PH stainless steel alloy are as follows:
- Melting Point: 2750°F (1510°C)
- Density: 0.280 lb/in³ (7.76 g/cm³)
- Specific Heat: 0.12 BTU/lb°F (500 J/kg°C)
- Electrical Conductivity: 15.4% IACS
- Thermal Conductivity: 8.1 BTU/hr-ft-°F (14.1 W/m-K)
Corrosion Resistance
15-5PH stainless steel alloy exhibits excellent corrosion resistance in various environments, including:
- Atmospheric Corrosion: Excellent resistance to atmospheric corrosion, including resistance to scaling and corrosion in marine environments.
- Chemical Corrosion: Good resistance to corrosion in acid and alkaline solutions, including sulfuric acid, hydrochloric acid, and sodium hydroxide.
- High-Temperature Corrosion: Good resistance to corrosion at high temperatures, including resistance to oxidation and carburization.
Applications
15-5PH stainless steel alloy is widely used in various industries, including:
- Aerospace: Used in aircraft and missile components, including fasteners, fittings, and other high-strength applications.
- Chemical Processing: Used in chemical processing equipment, including reactors, heat exchangers, and pipes.
- Power Generation: Used in power generation equipment, including turbine blades, couplings, and other high-strength applications.
Conclusion
In conclusion, 15-5PH stainless steel alloy exhibits a unique combination of high strength, corrosion resistance, and excellent fabricability, making it an ideal material for various industrial applications. Its properties make it suitable for use in harsh environments, and its versatility has led to its widespread adoption in various industries.
