Introduction: Nimonic PK33 is a high-temperature alloy that was developed for use in extreme environments. It is known for its exceptional resistance to oxidation, corrosion, and thermal fatigue, making it a popular choice for applications such as gas turbines, turbochargers, and other high-temperature components. In this article, we will explore the composition, mechanical properties, and applications of Nimonic PK33, as well as how it compares to other high-temperature alloys.
Chemical Composition: Nimonic PK33 is a nickel-based alloy containing chromium, aluminum, and titanium. The chemical composition is as follows:
- Nickel (Ni): 58-60%
- Chromium (Cr): 19-21%
- Aluminum (Al): 4-5%
- Titanium (Ti): 1-2%
- Iron (Fe): 12-14%
- Manganese (Mn): 0.5% max
- Copper (Cu): 0.5% max
- Silicon (Si): 0.5% max
- Carbon (C): 0.08% max
Mechanical Properties: Nimonic PK33 exhibits excellent mechanical properties at high temperatures, including:
- Tensile Strength: 800-850 MPa (at room temperature)
- Yield Strength: 400-450 MPa (at room temperature)
- Elongation: 25-30%
- Hardness: 250-280 HB
The alloy also maintains its strength and ductility at elevated temperatures, with a maximum operating temperature of 950°C (1742°F).
Equivalent Alloys: Nimonic PK33 is similar in composition and performance to other high-temperature alloys, such as Inconel 718, Waspaloy, and Haynes 282. However, PK33 offers superior thermal stability and resistance to corrosion and oxidation compared to these alloys, making it an ideal choice for extreme environments.
Applications: Nimonic PK33 is commonly used in the following applications:
- Gas turbines: PK33′s exceptional resistance to oxidation and thermal fatigue makes it a popular choice for gas turbine components such as combustion chambers, turbine blades, and vanes.
- Turbochargers: The alloy’s high-temperature strength and resistance to corrosion make it well-suited for use in turbocharger impellers and turbine wheels.
- Aerospace: PK33 is used in aircraft engines, exhaust systems, and other high-temperature components.
- Automotive: The alloy is also used in automotive applications such as exhaust valves and turbocharger components.
Production Standard: Nimonic PK33 is produced to various standards, including AMS 5914, BS HR2, and ISO 9723. These standards ensure that the alloy meets specific chemical composition, mechanical properties, and quality requirements.
Product Forms: Nimonic PK33 is available in various product forms, including round bar, plate, sheet, strip, pipe, and wire rod. ANTON METAL, a company with more than 20 years of experience in the metal industry, offers PK33 in all of these product forms.
Conclusion: Nimonic PK33 is a high-temperature alloy that offers exceptional resistance to oxidation, corrosion, and thermal fatigue. It is commonly used in gas turbines, turbochargers, aerospace, and automotive applications. With its superior thermal stability and resistance to corrosion and oxidation, PK33 is an excellent choice for extreme environments. ANTON METAL, with their extensive experience and expertise in the metal industry, is a reliable source for PK33 and other high-performance alloys.
Post time: Jun-17-2023
