Duplex Stainless Steel Wire Mesh
High Strength Duplex Stainless Steel Woven Wire Mesh for Corrosion Resistance, Filtration, and Industrial Applications
Super duplex stainless steel woven mesh is a premium corrosion-resistant mesh woven from duplex alloy wires that combine austenitic and ferritic microstructures with added molybdenum (Mo) for enhanced performance. This high-strength mesh provides outstanding resistance to pitting, crevice, and stress corrosion cracking, particularly in chloride-rich and acidic environments. The addition of molybdenum significantly improves its mechanical properties and long-term durability.
It is primarily produced in two grades: UNS S32750, known for excellent chloride corrosion resistance, high tensile strength, and weldability; and UNS S31803, which offers strong impact toughness, good localized corrosion resistance, and superior thermal conductivity.
With its low thermal expansion and high mechanical strength, super duplex stainless steel woven mesh is ideal for use in extreme industrial environments, including oil and gas, desalination, chemical processing, and food-grade filtration systems. Its robust construction and corrosion resistance make it a reliable solution for both structural and filtration applications.
Weave Types Available
Plain Weave
Plain Weave is the simplest and most common weave pattern for woven wire mesh. In this design, each wire passes alternately over and under one wire in both the warp (longitudinal) and weft (transverse) directions, forming a criss-cross pattern with square openings. This straightforward structure provides a good balance between filtration and flow rate, making it suitable for applications where moderate particle retention and consistent flow are required. Its inherent strength and durability also make it a reliable choice for general-purpose filtration tasks.
Twill Weave
Twill Weave is a more intricate pattern where each wire passes over two wires and under two wires, with an offset in each row that creates a distinctive diagonal appearance. This design allows for a tighter mesh with smaller openings compared to Plain Weave, even when using wires of the same diameter. As a result, Twill Weave offers finer filtration while maintaining higher flow rates due to its increased open area. It is ideal for applications requiring enhanced particle retention without significantly compromising fluid throughput.
Various Standards of Duplex Stainless Steel Mesh Material
| AISI | UNS | DIN | SAF | GB/T |
| 2205 | S31803 | 1.4462 | 2205 | 022Cr22Ni5Mo3N |
| 2507 | S32750 | 1.441 | 2507 | 022Cr25Ni7Mo4N |
Materials Chemical Composition
| Chemical Composition of Duplex Stainless Steel Woven Wire Mesh | ||
| Element | UNS S32750 (%) | UNS S31803 (%) |
| Chromium (Cr) | 24.0 – 26.0 | 21.0 – 23.0 |
| Nickel (Ni) | 6.0 – 8.0 | 4.5 – 6.5 |
| Molybdenum (Mo) | 3.0 – 5.0 | 2.5 – 3.5 |
| Nitrogen (N) | 0.24 – 0.32 | 0.08 – 0.20 |
| Manganese (Mn) | ≤ 1.2 | ≤ 2.0 |
| Carbon (C) | ≤ 0.030 | ≤ 0.030 |
| Silicon (Si) | ≤ 0.8 | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.035 | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 | ≤ 0.020 |
| Iron (Fe) | Balance | Balance |
Mechanical Properties
| Mechanical Properties of Super Duplex Stainless Steel Woven Wire Mesh | |||
| Property | UNS S32750 | UNS S31803 | Unit |
| Tensile Strength | ≥ 795 | ≥ 620 | MPa |
| Yield Strength (0.2% offset) | ≥ 550 | ≥ 450 | MPa |
| Elongation (in 50mm) | ≥ 15 | ≥ 25 | % |
| Hardness (Brinell) | ≤ 293 | ≤ 290 | HB |
| Impact Toughness (Charpy V) | ≥ 60 | ≥ 45 | J @ -46°C |
| Modulus of Elasticity | ~200 | ~200 | GPa |
| Thermal Conductivity | 14 | 19 | W/m·K @ 100°C |
| Coefficient of Thermal Expansion | 13.5 | 13 | µm/m·K (20–100°C) |
| Density | 7.8 | 7.8 | g/cm³ |
Advantages of Duplex Stainless Steel Woven Wire Mesh
- Exceptional Corrosion Resistance
Excellent resistance to organic and inorganic acids, especially chlorides and diluted hydrochloric acid. - Outstanding Mechanical Strength
High tensile and compressive strength, suitable for high-pressure and impact environments. - Superior Pitting and Crevice Corrosion Resistance
Ideal for marine and chemical environments prone to localized corrosion. - Good Weldability and Fabrication
Easily formed and welded for complex structures and systems. - Thermal Stability
Low thermal expansion and high thermal conductivity for use in high-temperature or cycling environments. - Long Service Life
Reduced maintenance and replacement costs in critical industrial operations.
Specification of Duplex Stainless Steel Woven Wire Mesh
| Specification of Duplex Stainless Steel Woven Wire Mesh | |||||
| Mesh/Inch | S.W.G | Aperture (mm) | Wire Diameter (mm) | Open Area (%) | Weight (Kg/m2) |
| 3 | 14 | 6.27 | 2.2 | 62 | 7 |
| 3 | 18 | 7.25 | 1.219 | 70 | 2.5 |
| 3.5 | 20 | 6.34 | 0.914 | 66 | 1.8 |
| 4 | 16 | 4.72 | 1.63 | 58 | 5 |
| 4 | 20 | 5.45 | 0.914 | 76 | 2.1 |
| 4.5 | 22 | 4.93 | 0.711 | 71 | 1.2 |
| 5 | 18 | 3.86 | 1.22 | 57 | 3.6 |
| 5 | 22 | 4.36 | 0.711 | 76 | 1.3 |
| 6 | 18 | 3.04 | 1.22 | 50 | 4.3 |
| 6 | 22 | 3.52 | 0.711 | 63 | 1.6 |
| 8 | 20 | 2.26 | 0.91 | 43 | 3.2 |
| 8 | 24 | 2.5 | 0.559 | 67 | 1.5 |
| 10 | 20 | 1.63 | 0.91 | 41 | 4 |
| 10 | 26 | 2.08 | 0.46 | 67 | 1.1 |
| 12 | 22 | 1.41 | 0.71 | 43 | 2.9 |
| 12 | 26 | 1.74 | 0.457 | 68 | 1.4 |
| 14 | 26 | 1.36 | 0.46 | 57 | 1.4 |
| 16 | 28 | 1.21 | 0.376 | 55 | 1.2 |
| 18 | 30 | 1.1 | 0.315 | 60 | 0.85 |
| 20 | 30 | 0.95 | 0.315 | 58 | 0.95 |
| 22 | 32 | 0.88 | 0.274 | 57 | 0.8 |
| 24 | 32 | 0.78 | 0.274 | 55 | 0.85 |
| 26 | 32 | 0.74 | 0.274 | 51 | 0.7 |
| 28 | 34 | 0.67 | 0.234 | 50 | 0.75 |
| 30 | 34 | 0.61 | 0.234 | 48 | 0.8 |
| 32 | 34 | 0.56 | 0.234 | 50 | 0.84 |
| 36 | 34 | 0.47 | 0.234 | 45 | 0.95 |
| 38 | 36 | 0.48 | 0.193 | 46 | 0.7 |
| 40 | 36 | 0.44 | 0.193 | 50 | 0.8 |
| 50 | 38 | 0.36 | 0.152 | 46 | 0.58 |
| 60 | 40 | 0.3 | 0.122 | 50 | 0.45 |
| 80 | 40 | 0.198 | 0.12 | 44 | 0.58 |
| 100 | 42 | 0.154 | 0.1 | 37 | 0.5 |
| 120 | 44 | 0.13 | 0.081 | 40 | 0.39 |
| 130 | 45 | 0.125 | 0.07 | 41 | 0.325 |
| 140 | 45 | 0.111 | 0.07 | 38 | 0.35 |
| 150 | 46.5 | 0.115 | 0.055 | 48 | 0.206 |
| 160 | 46 | 0.097 | 0.61 | 32 | 0.3 |
| 170 | 47 | 0.09 | 0.05 | 41 | 0.213 |
| 180 | 47 | 0.09 | 0.051 | 410 | 0.24 |
| 190 | 47 | 0.083 | 0.051 | 40 | 0.24 |
| 200 | 48 | 0.086 | 0.041 | 46 | 0.17 |
| 220 | 48 | 0.074 | 0.041 | 41 | 0.19 |
| 240 | 48 | 0.065 | 0.041 | 39 | 0.2 |
| 250 | 48 | 0.061 | 0.041 | 38 | 0.22 |
| 260 | 48 | 0.057 | 0.041 | 34 | 0.22 |
| 280 | 49 | 0.06 | 0.031 | 31 | 0.14 |
| 300 | 49 | 0.054 | 0.031 | 40 | 0.15 |
| 320 | 49 | 0.048 | 0.031 | 39 | 0.16 |
| 350 | 49 | 0.042 | 0.031 | 36 | 0.16 |
| 400 | 50 | 0.0385 | 0.025 | 39 | 0.013 |
| 450 | 50 | 0.0314 | 0.025 | 37 | 0.14 |
| 500 | 50 | 0.0258 | 0.025 | 35 | 0.156 |
Applications of Duplex Stainless Steel Woven Wire Mesh
UNS S32750 Mesh Applications:
- Oil & gas industry filtration and structural components
- Seawater desalination filters and pumps
- Power plant and chemical absorption tower units
- Pressure vessels and storage tanks
- Offshore platforms and seawater systems
UNS S31803 Mesh Applications:
- Filtration in pulp and paper industry
- Petrochemical process filters
- Food processing equipment and components
- Wastewater treatment and purification systems
- Paper bleaching and drying systems
General Industrial Applications:
- High-pressure pipelines and heat exchangers
- Combustion gas purification equipment
- Structural mesh in corrosion-prone environments
- Water treatment and clean water supply systems
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