ASTM A789 UNS S32750 Super Duplex Steel Tube , For Surviving Seawater Application

ASTM A789 S32750 duplex stainless steel tubes are a premium-grade solution engineered for industries requiring exceptional corrosion resistance,high strength, and durability. Combining the best properties of austenitic and ferritic stainless steels, Duplex 2507 (UNS S32750) is a hyper-duplex alloy ideal for harsh environments such as offshore oil & gas, chemical processing, and marine applications.

Chemical Composition of A789 UNS S32750 Tube

PREN (Pitting Resistance Equivalent Number) ensures outstanding resistance to localized corrosion.

Mechanical Properties of A789 UNS S32750 Tube

Combines high strength with excellent toughness, even at sub-zero temperatures.

Physical Properties

Optimized for thermal stability and energy efficiency in extreme conditions.

Key Advantages

• Resists pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride-rich environments (e.g., seawater, acidic media).

✅ Double the Strength of 316L

• High yield strength reduces material thickness and weight, lowering installation and lifecycle costs.

✅ Cost-Effective Longevity

• Outperforms austenitic steels in aggressive settings, minimizing maintenance and replacement needs.

✅ Weldability & Fabrication

• Compatible with standard welding techniques (TIG, MIG) and cold forming processes.

Application Fields

1. Oil & Gas Industry

• Subsea pipelines, downhole tubing, and risers.
• Process equipment in sour gas environments (H₂S/CO₂).

2. Chemical & Petrochemical

• Heat exchangers, reactors, and acid storage tanks.

3. Marine Engineering

• Seawater desalination plants, shipbuilding components.

4. Power Generation

• Flue gas scrubbers, condensers in thermal plants.

5. Pulp & Paper

• Bleaching equipment and corrosive chemical handling.

Certifications & Compliance

• ASTM A789/A789M: Standard specification for seamless and welded ferritic/austenitic stainless steel tubing.
• NACE MR0175/ISO 15156: Certified for sour service environments.
• EN 10204 3.1/3.2: Material test certificates available.