Certainly! Below is a 500-word description of Stainless Steel Plate 904L in English: --- Stainless Steel Plate 904L: Properties and Applications Stainless steel plate 904L is a high-performance austenitic stainless steel known for its exceptional corrosion resistance, durability, and versatility in demanding environments. This alloy is part of the super austenitic stainless steel family, offering superior performance compared to standard grades like 304 or 316. Its unique composition makes it ideal for applications where resistance to aggressive chemicals, acids, and seawater is critical. Composition and Key Features The 904L stainless steel plate is characterized by its high alloy content, including: - Chromium (19-23%): Provides excellent oxidation and corrosion resistance. - Nickel (23-28%): Enhances ductility and resistance to acidic environments. - Molybdenum (4-5%): Improves resistance to pitting and crevice corrosion, especially in chloride-rich conditions. - Copper (1-2%): Adds resistance to sulfuric acid and other reducing agents. This combination ensures 904L performs exceptionally well in harsh industrial, marine, and chemical processing settings. Corrosion Resistance One of the standout properties of 904L stainless steel plate is its superior corrosion resistance, surpassing standard austenitic grades. It withstands: - Sulfuric acid, phosphoric acid, and organic acids - Chloride-induced stress corrosion cracking (SCC) - Seawater and saline environments - High-temperature oxidizing conditions Its resistance to localized corrosion (pitting and crevice corrosion) makes it a preferred choice for equipment exposed to aggressive media. Mechanical Properties - Tensile Strength: 490-690 MPa - Yield Strength: ≥220 MPa - Elongation: ≥35% - Hardness: ≤90 HRB (Rockwell B) The alloy maintains excellent weldability and formability, allowing for fabrication into complex structures without compromising performance. Applications Due to its robustness, 904L stainless steel plate is widely used in: 1. Chemical & Petrochemical Industry: Reactors, heat exchangers, and piping systems handling corrosive chemicals. 2. Oil & Gas: Offshore platforms, pipelines, and components exposed to sour gas (H₂S). 3. Pharmaceutical & Food Processing: Equipment requiring high hygiene standards and resistance to cleaning agents. 4. Marine Engineering: Shipbuilding components, desalination plants, and seawater cooling systems. 5. Pollution Control: Scrubbers and flue gas desulfurization (FGD) systems. Advantages Over Other Grades Compared to 316L or 317L, 904L offers: - Better resistance to sulfuric acid and chlorides - Higher durability in extreme pH conditions - Longer service life in corrosive environments, reducing maintenance costs. Conclusion The 904L stainless steel plate is a premium material designed for industries where corrosion resistance and longevity are paramount. Its balanced composition, mechanical strength, and adaptability to fabrication processes make it indispensable for critical applications. Whether in chemical processing, marine engineering, or energy sectors, 904L ensures reliability and performance under the most challenging conditions. --- This description covers the key aspects of 904L stainless steel plate while maintaining a professional and informative tone. Let me know if you'd like any modifications!