904L Stainless Steel Wire Mesh
UNS N08904 / EN 1.4539 Super Austenitic Stainless Steel Mesh
| Material | 904L Stainless Steel |
| Standard | UNS N08904 / EN 1.4539 |
| Mesh Count | 1–400 Mesh |
| Weave Type | Plain / Twill / Dutch |
| Operating Temp. | < 400°C Recommended |
| Width | Customizable |
| Form | Rolls / Sheets / Strips |
Product Overview
904L stainless steel wire mesh is a high-performance metal mesh manufactured from super austenitic stainless steel (UNS N08904 / EN 1.4539). The combination of high nickel, molybdenum and copper content provides exceptional resistance to sulfuric acid, phosphoric acid, chloride-containing environments and other aggressive media. It is widely used in chemical processing, marine engineering, oil & gas, environmental protection and other demanding industries.
904L stainless steel wire mesh is a high-performance metal mesh manufactured from super austenitic stainless steel (UNS N08904 / EN 1.4539). The combination of high nickel, molybdenum and copper content provides exceptional resistance to sulfuric acid, phosphoric acid, chloride-containing environments and other aggressive media. It is widely used in chemical processing, marine engineering, oil & gas, environmental protection and other demanding industries.
Chemical Composition & Key Advantages
Chemical Composition (%)
| Element | Content |
|---|---|
| C | ≤ 0.02% |
| Mn | ≤ 2.00% |
| Si | ≤ 1.00% |
| Cr | 19.0% – 23.0% |
| Ni | 23.0% – 28.0% |
| Mo | 4.0% – 5.0% |
| Cu | 1.0% – 2.0% |
| P | ≤ 0.045% |
| S | ≤ 0.035% |
Key Advantages
- Excellent corrosion resistance (superior to 304L & 316L)
- Outstanding resistance to pitting and crevice corrosion
- Strong resistance to chloride stress corrosion cracking (SCC)
- Excellent resistance to sulfuric, phosphoric and organic acids
- Non-magnetic in all conditions
- Good weldability and fabrication performance
- High fatigue strength for harsh industrial environments
- Long service life with reduced maintenance costs
Role of Nickel in 904L Stainless Steel
The high nickel content (23–28%) is one of the defining characteristics of 904L stainless steel. Nickel stabilizes the austenitic structure, improves toughness and ductility, and significantly enhances resistance to reducing acids. Together with molybdenum and copper, nickel contributes to outstanding performance in chloride-containing environments and improves resistance to stress corrosion cracking.
- Enhances resistance to sulfuric and phosphoric acids
- Improves chloride SCC resistance
- Maintains stable non-magnetic austenitic structure
- Increases toughness and ductility
- Improves weldability and fabrication performance
Corrosion Resistance Performance
| Environment | Performance |
|---|---|
| Sulfuric Acid | Excellent (especially below 70°C) |
| Phosphoric Acid | Excellent |
| Acetic Acid | Excellent |
| Formic Acid | Excellent |
| Sea Water | Excellent |
| Salt Spray Environment | Excellent |
| Chemical Wastewater | Excellent |
| Typical Corrosion Rate | Value |
|---|---|
| 20% Acetic Acid | ≈ 0.02 mm/a |
| 20% Phosphoric Acid | ≈ 0.01 mm/a |
| 10% Sulfuric Acid | ≈ 2.57 mm/a |
Technical Specifications
| Item | Specification |
|---|---|
| Mesh Count | 1–400 Mesh (Special up to 325/2300 Mesh) |
| Weave Type | Plain Weave / Twill Weave / Dutch Weave |
| Operating Temperature | Recommended below 750°F (~400°C) |
| Width | Customizable |
| Available Forms | Rolls, Sheets, Slitted Strips |
Manufacturing Methods
Weaving Methods
- Plain Weave
- Twill Weave
- Dutch Weave
Fabrication
- Easy to weld
- Can be punched, bent and cut
- Requires higher forming force than 316L
Applications
Chemical & Petrochemical
- Acid processing equipment
- Reactor systems
- Industrial filtration
Oil & Gas
- Wellhead equipment
- Pipelines
- Valve systems
Marine Engineering
- Desalination plants
- Offshore platforms
- Marine hardware
Environmental Protection
- Electroplating wastewater
- Chemical wastewater treatment
Food & Pharmaceutical
- Food processing equipment
- Medical devices
Energy & Advanced Industry
- Nuclear facilities
- Power plants
- Biofuel systems
Additional Notes
- Embrittlement may occur above 400°C.
- More difficult to machine than 316L due to higher alloy content.
- Material selection should be carefully evaluated for strong oxidizing acids such as nitric acid.
- Suitable for high-corrosion and long-service-life applications.
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