Stainless Steel - Grade 2507/1.4410
Description
2507/1.4410 is a super duplex stainless steel that combines high strength and excellent corrosion resistance, especially in chloride environments. It features a mixed microstructure of approximately 50% austenite (γ) and 50% ferrite (α), which provides superior mechanical properties and resistance to stress corrosion cracking.
Chemical Composition
The typical chemical composition of 2507 is as follows:
- Carbon (C): ≤ 0.03%
- Manganese (Mn): ≤ 1.0%
- Silicon (Si): ≤ 1.0%
- Phosphorus (P): ≤ 0.03%
- Sulfur (S): Sulfur (S):
- Chromium (Cr): 24.0% - 26.0%
- Nickel (Ni): 6.0% - 8.0%
- Molybdenum (Mo): 3.5% - 5.0%
- Nitrogen (N): 0.24% - 0.30%
- Copper (Cu): ≤ 0.5%.
Mechanical Properties
The mechanical properties of 2507 at room temperature (20°C) are:
- Tensile Strength (Rm): ≥ 620 MPa
- Yield Strength (Rp0.2): ≥ 450 MPa
- Elongation (A): ≥ 25%
- Hardness: ≤ 32 HRC.
Thermal & Physical Properties
The thermal and physical properties include:
- Density: 7.9 g/cm³
- Melting Point: ~ 1450°C
- Thermal Conductivity: 13.5 W/m•K
- Specific Heat: 460 J/kg•K
- Mean Coefficient of Thermal Expansion: 14.0 x 10⁻⁶/K (20-200°C) and 14.5 x 10⁻⁶/K (20-400°C).
Other Designations
- UNS Number: S32750
- DIN EN: 1.4410
- AFNOR: Z3 CN 25.06 Az.
Fabrication and Heat Treatment
2507 can be fabricated using standard methods such as welding, machining, and forming.
Heat Treatment:
Welding:
Applications
2507 is widely used in various industries due to its excellent mechanical properties and corrosion resistance. Typical applications include:
- Oil and gas industry equipment
- Offshore platforms and heat exchangers
- Chemical processing plants
- Desalination plants
- High-pressure RO plants
- Structural components and piping systems.
Supplied Forms
2507 is available in various forms, including:
- Bars and rods
- Fittings and flanges
- Coils.
Features
- Superior resistance to pitting and crevice corrosion.
- High strength and toughness.
- Excellent resistance to stress corrosion cracking.
- Suitable for harsh environments, including marine applications.
This datasheet summarizes the critical aspects of 2507 grade stainless steel, making it suitable for various demanding applications.