S32750 2507 Super Duplex Steel Seamless Tube for Marine

Super Duplex steel S32750 seamless tube is engineered for extreme performance in highly corrosive environments. With a Pitting Resistance Equivalent Number (PREN) exceeding 40, it offers unparalleled resistance to localized corrosion, making it ideal for marine, subsea, desalination, and oil & gas applications.

Super Duplex S32750 features a unique chemical composition with high chromium, molybdenum, and nitrogen content. This combination provides exceptional resistance to stress corrosion cracking (SCC) in high-chloride environments like warm seawater, outperforming standard duplex and most austenitic stainless steels.

Chemical Composition (wt %), ASTM A789:

• Chromium (Cr): 24.0 - 26.0
• Nickel (Ni): 6.0 - 8.0
• Molybdenum (Mo): 3.0 - 5.0
• Nitrogen (N): 0.24 - 0.32
• Manganese (Mn): 1.20 max
• Copper (Cu): 0.50 max

Mechanical Properties (Minimum), ASTM A789:

• Tensile Strength: 800 MPa (116 ksi)
• Yield Strength: 550 MPa (80 ksi)
• Elongation: 15%
• Hardness: 310 HBW / 32 HRC max

S32750 Seamless Tube is specified for critical marine applications including:

• Control lines and hydraulic pipes in subsea oil and gas production systems
• High-pressure end of reverse osmosis in seawater desalination (SWRO)
• Process piping for handling highly corrosive media in offshore chemical plants

Our stringent quality control measures include:

• Metallographic analysis to ensure optimal austenite/ferrite phase ratio (40-60%)
• Solution annealing and quenching heat treatment
• Comprehensive non-destructive testing and dimensional inspection

We provide reliable worldwide export services with:

• Expertise in international logistics and documentation
• Secure export packaging for high-value materials
• Timely delivery to global destinations