Alloy Geek Alloy 29-4 Austenitic Stainless Steel
Alloy 29-4, also known as UNS N08020, is a high-alloy austenitic stainless steel with excellent resistance to corrosion in a wide range of aggressive environments, including those containing sulfuric acid, phosphoric acid, and other acids. It is often referred to as "20 Alloy" or "20Cb-3" as well.
The composition of Alloy 29-4 typically includes:
- Chromium (about 19-21%)
- Nickel (about 32-38%)
- Molybdenum (about 2-3%)
- Copper (about 3-4%)
- Iron (about 27-32%)
- Small amounts of other elements like manganese, silicon, carbon, and nitrogen
Key features and characteristics of Alloy 29-4:
Corrosion Resistance: Alloy 29-4 is highly resistant to corrosion, particularly in aggressive environments such as sulfuric acid and phosphoric acid solutions. This makes it suitable for applications in chemical processing, petrochemical, and other industries where corrosion resistance is critical.
Strength: The alloy has good mechanical strength and can maintain its properties at elevated temperatures.
Weldability: Alloy 29-4 is weldable using common welding methods, though proper welding procedures should be followed to ensure the preservation of its corrosion resistance.
Applications: Alloy 29-4 is commonly used in industries involving sulfuric acid production and handling, as well as in applications where strong resistance to corrosion is needed, such as in heat exchangers, chemical reactors, and tanks.
Forms: Alloy 29-4 is available in various forms, including sheets, plates, bars, and tubes.
Due to its exceptional corrosion resistance, Alloy 29-4 is highly valued in industries where aggressive chemical environments are present. If you're considering using Alloy 29-4 for a specific project, consulting with materials experts or manufacturers is recommended to ensure it meets your desired performance requirements, especially in terms of corrosion resistance and compatibility with the specific chemical conditions of your application.
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