904l Stainless Steel Plate
904L stainless steel plate is a high-alloy austenitic stainless steel combining low carbon content with high nickel, molybdenum, and copper levels for superior corrosion resistance. It is widely used in chemical processing, marine, energy, pharmaceutical, and high-end industrial applications, providing long-term durability, toughness, and resistance to aggressive environments.
- Description
904L stainless steel is a high-alloy austenitic stainless steel with low carbon content and enhanced corrosion resistance. It is particularly resistant to strong acids, chlorides, and oxidizing environments, making it ideal for chemical processing, marine applications, and high-end industrial equipment.
Chemical Composition
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 19–23 |
| Nickel (Ni) | 23–28 |
| Molybdenum (Mo) | 4–5 |
| Copper (Cu) | 1–2 |
| Carbon (C) | ≤ 0.02 |
| Manganese (Mn) | ≤ 2 |
| Silicon (Si) | ≤ 1 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
Key Features:
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Low carbon content prevents sensitization during welding
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High nickel, molybdenum, and copper content provide excellent resistance to acids, chloride stress corrosion, and pitting
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Outstanding ductility, toughness, and workability
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 500–700 MPa |
| Yield Strength | 215–310 MPa |
| Elongation | ≥ 40% |
| Hardness | 80–95 HRB |
| Temperature Range | -196°C to 300°C (for continuous service) |
Highlights:
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Excellent corrosion resistance in sulfuric, phosphoric, and hydrochloric acids
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Maintains mechanical properties and toughness at cryogenic and elevated temperatures
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Suitable for welding, forming, and high-performance applications
Corrosion Resistance
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Resistant to pitting, crevice, and stress corrosion in chloride-rich environments
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Performs well in chemical processing, seawater, and industrial acid environments
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Ideal for applications where standard 316L or 316 stainless steel may fail
Common Applications
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Chemical & Petrochemical Industry: Reactors, heat exchangers, piping, and tanks for strong acids
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Marine Equipment: Offshore structures, seawater handling equipment, and desalination plants
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Energy & Power: Flue gas scrubbers, evaporators, and high-performance valves
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Pharmaceutical & Food Industry: High-purity processing equipment resistant to corrosion
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High-End Industrial Equipment: Pumps, mixers, and machinery exposed to harsh environments
