The material 1.4410, also known as X2CrNiMoN25-7-4 or UNS S32750, is a duplex stainless steel that offers a combination of excellent corrosion resistance and high strength. It belongs to the austenitic-ferritic duplex stainless steel family, which consists of a two-phase microstructure comprising both austenite and ferrite.
Here are the typical chemical composition and mechanical properties of 1.4410 (X2CrNiMoN25-7-4 or UNS S32750):
Chemical Composition (in percentage):
- Carbon (C): 0.03 max
- Silicon (Si): 0.8 max
- Manganese (Mn): 1.2 max
- Phosphorus (P): 0.035 max
- Sulfur (S): 0.02 max
- Chromium (Cr): 24.0 – 26.0
- Nickel (Ni): 6.0 – 8.0
- Molybdenum (Mo): 3.0 – 5.0
- Nitrogen (N): 0.24 – 0.32
- Copper (Cu): 0.5 max
- Iron (Fe): Balance
Mechanical Properties:
- Tensile Strength: 800 – 1000 MPa (115,000 – 145,000 psi)
- Yield Strength (0.2% offset): 550 – 800 MPa (80,000 – 116,000 psi)
- Elongation: 15 – 25%
- Hardness: ≤ 310 HBW
Here are some key features and properties of the 1.4410 material:
- Corrosion Resistance: 1.4410 exhibits outstanding resistance to various corrosive environments, including chloride-containing media such as seawater. It has superior pitting and crevice corrosion resistance, making it suitable for applications in aggressive and corrosive environments.
- Strength and Toughness: This material possesses high strength and excellent toughness, enabling it to withstand heavy loads and impacts. It offers better strength compared to standard austenitic stainless steels.
- Duplex Structure: The duplex microstructure of 1.4410 provides a balanced combination of properties from both austenitic and ferritic stainless steels. It offers good weldability and formability while maintaining high mechanical strength.
- Resistance to Stress Corrosion Cracking: 1.4410 has good resistance to stress corrosion cracking (SCC), which is a type of corrosion that occurs under tensile stress in specific environments. This property makes it suitable for applications where SCC is a concern.
- Wide Range of Applications: Due to its excellent corrosion resistance, high strength, and other favorable properties, 1.4410 is commonly used in various industries. It finds applications in offshore and marine environments, chemical processing plants, oil and gas exploration and production, desalination plants, pulp and paper industry, and more.
It’s important to note that specific properties and performance may vary depending on the manufacturing processes, heat treatment, and specific application requirements. When considering the use of 1.4410, it is advisable to consult with material experts or refer to relevant standards and specifications to ensure its suitability for your specific application.
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