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ASTM A789 S32750 SMLS Duplex Steel Bright Tube, Resistance to Chloride Ion Corrosion

ASTM A789 S32750 SMLS Duplex Steel Bright Tube is a tubing product manufactured from UNS S32750 (2507) super duplex stainless steel via a seamless (SMLS) process and featuring a bright surface finish. The material possesses a characteristic austenitic-ferritic duplex microstructure, which provides a combination of high mechanical strength and superior corrosion resistance. It demonstrates exceptional resistance to localized corrosion, including pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-containing environments (e.g., seawater, brines, chemical process media). This product is widely used in highly demanding applications that require exceptional strength, corrosion resistance, and reliability, such as offshore engineering, oil & gas production, chemical processing, and desalination plants.

1.Chemical & Mechanical Properties

Mechanical Properties

Heat Treatment Requires

2. Key Adventages

• Exceptional Chloride Ion Corrosion Resistance
  Superior resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing environments (e.g., seawater, brine) compared to standard austenitic stainless steels like 304/316.
• Exceptionally High Mechanical Strength
  Yield strength is more than double that of conventional austenitic stainless steels (e.g., 304), allowing for higher pressure ratings, mechanical load capacity, and potential for lighter, thinner wall designs.
• Seamless Construction for Structural Integrity
  The absence of a longitudinal weld seam eliminates a potential initiation point for corrosion, ensuring higher safety and reliability under high pressure and in critical applications.
• Bright Surface Finish for Cleanability & Corrosion Resistance
  Smooth, polished inner/outer surfaces minimize scaling and contaminant adhesion, facilitate easy cleaning and sterilization, and are ideal for applications requiring high hygiene or fluid purity.
• Excellent Cost-Effectiveness & Life Cycle Cost
  Offers a lower initial cost compared to high-nickel alloys (e.g., Hastelloy, 6Mo super austenitics). Its extended service life compared to standard stainless steels significantly reduces maintenance and replacement costs.

3. Key Applications

• Chemical Processing, Transport and Storage
• Oil and Gas Exploration and Offshore Rigs
• Mil and Gas Refining
• Marine Environments
• Pollution Control Equipment
• Pulp & Paper Manufacturing
• Chemical Process Plant

Order information:

Orders for product under this specification should include as following, so that we can provide you with a more accurate price.

• Quantity (inch, metres, or number of lengths)
• Type of product (seamless or welded tubes)
• Grade
• Size (outside diameter and average wall thickness, unless minimum wall thickness is specified)
• Length (specific or random)
• Special requirements