904L Stainless Steel Pipe/Tube Details
Overview
904L stainless steel pipe/tube is a high-alloy austenitic stainless steel known for its excellent resistance to corrosion, particularly in aggressive environments. It is commonly used in applications requiring superior corrosion resistance, high strength, and good toughness.
Key Characteristics
Excellent Corrosion Resistance: Provides outstanding resistance to a wide range of corrosive environments, including chloride-induced pitting and crevice corrosion, making it ideal for use in highly corrosive conditions.
High Strength: Offers good mechanical strength, though not as high as some duplex grades, making it suitable for structural applications.
Good Toughness: Maintains good impact resistance and toughness at both room temperature and low temperatures.
Weldability: Can be welded using standard techniques, with good results. Preheating and post-weld heat treatment are generally not required, though care should be taken to avoid issues such as hot cracking.
Chemical Composition
Carbon (C): ≤ 0.020%
Manganese (Mn): 1.00%
Silicon (Si): ≤ 1.00%
Phosphorus (P): ≤ 0.045%
Sulfur (S): ≤ 0.035%
Chromium (Cr): 19.00-23.00%
Nickel (Ni): 23.00-28.00%
Molybdenum (Mo): 4.00-5.00%
Copper (Cu): 1.00-2.00%
Common Applications
Chemical Processing: Used in chemical processing equipment where exposure to aggressive chemicals and high temperatures is common, due to its superior resistance to corrosion.
Oil and Gas Industry: Applied in environments where high resistance to chloride-induced corrosion and high strength are required, such as in offshore platforms and refineries.
Marine Environments: Suitable for marine and coastal applications, including seawater systems, thanks to its excellent resistance to chloride-induced corrosion.
Pharmaceutical Industry: Employed in the pharmaceutical industry for equipment exposed to corrosive substances and stringent cleaning processes.
Advantages
Superior Corrosion Resistance: Offers exceptional protection against a wide range of corrosive environments, including chlorides and acids, reducing maintenance and extending service life.
Good Mechanical Properties: Provides good strength and toughness, making it suitable for structural and high-stress applications.
Ease of Fabrication: Can be easily fabricated into various forms and sizes, facilitating diverse manufacturing processes.
Cost-Effective: While more expensive than some other stainless steels, its durability and resistance to corrosion can lead to cost savings through reduced maintenance and longer service life.
Summary
904L stainless steel pipe/tube is a high-alloy austenitic stainless steel known for its excellent corrosion resistance, high strength, and good toughness. Its chemical composition and properties make it suitable for a range of demanding applications, including chemical processing, oil and gas, marine environments, and the pharmaceutical industry. With its combination of superior performance and durability in aggressive conditions, 904L stainless steel is a reliable choice for applications requiring exceptional material properties.
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