ASTM A789 S32750 Super Duplex Stainless Steel Seamless Tube

ASTM A789 S32750 is a high-performance super duplex stainless steel that offers exceptional strength, corrosion resistance, and durability. It is widely utilized in industries that demand high reliability and performance under challenging conditions, such as oil and gas, chemical processing, and marine applications.

Key Features

• Super Duplex Composition:

  • Contains a balanced mix of austenitic and ferritic stainless steel microstructures, offering superior mechanical properties and corrosion resistance compared to standard duplex grades.
  • Typical composition includes high levels of chromium (24-26%), molybdenum (3-5%), and nitrogen, providing excellent resistance to pitting and crevice corrosion.

• Corrosion Resistance:

  • Excellent resistance to chloride-induced stress corrosion cracking (SCC), pitting, and crevice corrosion, especially in seawater and high-chloride environments.
  • Superior to 316L and 317L stainless steels in harsh environments.

• High Strength:

  • Yield strength is approximately twice that of conventional austenitic stainless steels.
  • Ensures durability under high pressure and temperature conditions.

• Seamless Construction:

  • Manufactured without welding, providing uniform strength and reducing the risk of defects or leaks.
  • Ideal for critical applications requiring high integrity and reliability.

Specifications

• Standard: ASTM A789
• Grade: UNS S32750 (commonly referred to as SAF 2507)
• Dimensions: Available in a range of sizes, typically conforming to customer-specific requirements.
• Manufacturing Process: Seamless cold-drawn or hot-extruded tubes.

Applications

• Oil & Gas Industry:
  • Used in offshore platforms, subsea pipelines, and heat exchangers.
• Chemical Processing:
  • Ideal for handling aggressive chemicals, acids, and high-chloride solutions.
• Desalination Plants:
  • Suitable for seawater handling and brine systems.
• Marine Industry:
  • Used in shipbuilding, ballast systems, and seawater cooling systems.

Chemical Composition (UNS S32750)

Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories,  the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always.   The factories already got certificates like : ABS, LR, DNV-GL, BV, KR, CCS, ASME, ISO 9001, ISO14001, ISO18001, ect.

Our factories main products as below : 
Factory 1th: Stainless steel seamless tube, Duplex steel seamless tube, Super duplex steel seamless tube, Nickel alloy steel seamless tube;

Factory 2th: Carbon steel seamless tube, Alloy steel seamless tube; Enhanced Heat Tranfer Tube, low fin tube ,U bending workshop;
Factory 3th: High frequency welding fin tube(HFW fin tube, Solid Fin tube, Studded Tube, Serrated Fin tube, Longitudinal welding fin tube), Wound fin tube(L type fin tube, LL type fin tube,  KL type fin tube), Embedded G type fin tube , Extruded fin tube,  low fin tube, U bend & 180deg. Return;

Yuhong Holding Group also has gained rich experience for project package( products contain:Pipes, Fittings, Flanges, heat exchanger, furnace, fired heater, air cooler, boiler) , YUHONG brand has marked its global presence in more than 85 countries, like, Korea, USA, Canada, Mexico, Colombia, Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand, Singapore, Malasyia, Indonesia, Thailand, Vietnam, Ukraine, Turkey,Sauid Arabia, Qatar, U.A.E,Israel,India, UK, France, Italy, Gernmany, Poland, Spain,... We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers as stockists around the world.