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904l Stainless Steel Plate
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904L stainless steel plate is a high-alloy austenitic stainless steel designed for extremely corrosive environments. It contains high levels of nickel, chromium, and molybdenum, with added copper, giving it outstanding resistance to a wide range of chemical and chloride-based corrosion conditions.
Compared with standard stainless steels like 304 and 316L, 904L is positioned as a super austenitic stainless steel grade with significantly enhanced corrosion performance.
Chemical Composition of 904L Stainless Steel
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 19.0 – 23.0 |
| Nickel (Ni) | 23.0 – 28.0 |
| Molybdenum (Mo) | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 |
| Carbon (C) | ≤ 0.02 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Iron (Fe) | Balance |
Key Features
- High nickel content improves overall corrosion resistance and toughness
- Molybdenum enhances resistance to pitting and crevice corrosion
- Copper improves resistance to sulfuric acid and reducing acids
- Very low carbon reduces intergranular corrosion risk
Key Properties of 904L Stainless Steel Plate
1. Excellent Corrosion Resistance
- Outstanding resistance to strong acids, chlorides, and seawater
- Performs well in highly aggressive chemical environments
- Superior to 316L in most corrosive conditions
2. Strong Resistance to Pitting and Crevice Corrosion
- High molybdenum content improves localized corrosion resistance
- Suitable for high-chloride and marine environments
3. Good Resistance to Acid Environments
- Excellent performance in sulfuric acid and phosphoric acid systems
- Widely used in chemical processing industries
4. Good Mechanical Properties
- Maintains strength and toughness under harsh conditions
- Excellent ductility and formability
- Suitable for welding and fabrication
904L vs 316L Stainless Steel Comparison
| Feature | 904L Stainless Steel | 316L Stainless Steel |
|---|---|---|
| Nickel Content | Very High | Medium |
| Molybdenum Content | Higher | Lower |
| Corrosion Resistance | Superior | Very Good |
| Acid Resistance | Excellent | Good |
| Cost Level | Higher | Lower |
| Application Level | Extreme environments | General corrosive environments |
Key Insight
904L is designed for more aggressive chemical environments where 316L may not provide sufficient protection.
Common Applications of 904L Stainless Steel Plate
1. Chemical Processing Industry
- Sulfuric acid storage and handling equipment
- Chemical reactors
- Heat exchangers in aggressive media
2. Oil and Gas Industry
- Offshore pipelines
- Corrosive fluid transport systems
- Process equipment in harsh environments
3. Marine Engineering
- Seawater cooling systems
- Offshore platforms
- Marine structural components
4. Pharmaceutical and Fine Chemical Industry
- High-purity chemical equipment
- Corrosion-resistant production systems
- Clean process piping
5. Desalination and Water Treatment
- High-chloride water systems
- Reverse osmosis equipment components
- Corrosion-resistant tanks and piping
Advantages of 904L Stainless Steel Plate
- Exceptional corrosion resistance in extreme environments
- Strong resistance to acids and chlorides
- Long service life in harsh conditions
- Good weldability and fabrication performance
- Suitable for critical industrial systems
Limitations
- High material cost due to high nickel and molybdenum content
- Not necessary for general-purpose applications
- More difficult to source and process than standard grades
Teda Ganghua – Supply Capability
Teda Ganghua supplies 904L stainless steel plates with stable quality and industrial support:
- Multiple thickness and custom sizes available
- Precision cutting and fabrication services
- Strict chemical and mechanical testing
- Export-grade packaging and logistics support
- Engineering project customization
With strong supply capability, Teda Ganghua provides high-performance stainless steel solutions for extreme corrosion environments.
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TIANJIN TEDA GANGHUA
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