347H Stainless Steel Plate/Sheet Details
Overview
347H stainless steel plate/sheet is an austenitic stainless steel alloy that is highly resistant to high-temperature oxidation and corrosion. It is a high-carbon version of the 347 grade, specifically designed for use in high-temperature environments where strength and resistance to carbide precipitation are essential.
Key Characteristics
High-Temperature Resistance: Excellent resistance to oxidation and maintains strength at high temperatures up to approximately 1500°F (815°C).
Corrosion Resistance: Provides good resistance to corrosion and oxidation in high-temperature and aggressive environments.
Stabilized with Columbium (Niobium): The addition of columbium (niobium) stabilizes the steel, preventing carbide precipitation and improving high-temperature stability.
Mechanical Properties: Offers high strength and good ductility at elevated temperatures.
Formability: Can be easily fabricated through welding, machining, and forming processes.
Chemical Composition
Carbon (C): ≤ 0.04%
Manganese (Mn): ≤ 2.00%
Silicon (Si): ≤ 1.00%
Phosphorus (P): ≤ 0.045%
Sulfur (S): ≤ 0.03%
Chromium (Cr): 17.0-19.0%
Nickel (Ni): 9.0-12.0%
Columbium (Nb): 0.5-1.0%
Nitrogen (N): ≤ 0.10%
Common Applications
High-Temperature Equipment: Used in equipment and components exposed to high temperatures, such as furnace parts, heat exchangers, and reactors.
Chemical Processing: Employed in chemical processing equipment that requires resistance to high temperatures and aggressive chemicals.
Petrochemical Industry: Suitable for use in petrochemical processing units where resistance to high temperatures and corrosion is crucial.
Exhaust Systems: Ideal for components in exhaust systems that operate under high-temperature conditions.
Power Generation: Utilized in power generation facilities for components like turbines and boilers.
Advantages
Superior High-Temperature Resistance: Maintains strength and resists oxidation at high temperatures, making it suitable for extreme conditions.
Good Corrosion Resistance: Effective against corrosion in high-temperature and aggressive environments.
Stabilized Against Carbide Precipitation: Columbium (niobium) addition stabilizes the steel, preventing carbide precipitation during welding and high-temperature exposure.
High Strength and Ductility: Offers excellent mechanical properties, including high strength and good ductility at elevated temperatures.
Summary
347H stainless steel plate/sheet is a high-performance material designed for demanding high-temperature applications. Its exceptional resistance to oxidation, corrosion, and carbide precipitation, combined with high strength and formability, makes it an ideal choice for use in high-temperature industrial environments.
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