Product material
Duplex stainless steel heat exchanger seamless tubes are high-performance tubes made from duplex stainless steel materials (2205/2507/S31803/S32750) in compliance with ASTM A789 standards. These tubes are characterized by excellent corrosion resistance, high mechanical strength, and good weldability, making them ideal for industrial applications in environments with high pressure, high temperature, and corrosive media. The duplex microstructure combines the advantages of austenitic and ferritic stainless steels, providing superior durability and reliability under extreme conditions.
These seamless tubes are specifically designed for heat exchanger applications, offering high heat transfer efficiency, lightweight properties, and exceptional resistance to pitting and crevice corrosion. They are especially well-suited for use in chloride-containing or seawater environments, significantly extending the lifespan of equipment, reducing maintenance costs, and enhancing operational efficiency.
Advantages of Duplex Steel Seamless Pipes in Air Fin Coolers:
A. High Strength and Durability:
Duplex stainless steels offer nearly double the strength of standard austenitic stainless steels like SS316.
This allows thinner pipe walls, reducing overall weight without compromising performance.
B. Superior Corrosion Resistance:
Excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, particularly in environments with chlorides.
C. Excellent Thermal Conductivity:
Enhanced thermal conductivity compared to other stainless steel grades, improving heat exchange efficiency.
D. Cost-Effective:
The high strength-to-weight ratio and corrosion resistance reduce maintenance and replacement costs over time.
E. Weldability:
Duplex seamless pipes exhibit good weldability, making installation and customization easier in air fin cooler systems.
Shanghai Toko Technology Co.,ltd is a professional manufacturer of Duplex steel heat exchanger seamless tubes ASTM A789 2205/2507/S31803/S32750 FIN SMLS TUBES, dedicated to ensuring quality and reliability for your industrial applications.
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Chemical Requirements as per ASTM A789
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UNS
Designation
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C(max)
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Mn(max)
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P(max)
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S(max)
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Si(max)
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Ni(min)
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Cr
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Mo
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Others
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S31803
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0.030
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2.00
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0.030
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0.020
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1.00
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4.5-6.5
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21.0-23.0
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2.5-3.5
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-
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S32750
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0.030
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1.20
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0.035
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0.020
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0.80
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6.0-8.0
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24.0-26.0
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3.0-5.0
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-
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