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ASTM A789 S32750 Super Duplex Stainless Steel Seamless Tube

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ASTM A789 S32750 Super Duplex Stainless Steel Seamless Tube

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Brand Name : Yuhong

Model Number : ASTM A789 S32750

Certification : ABS, BV, CCS, DNV, LR

Place of Origin : China

MOQ : 100KG

Price : Negotiable

Payment Terms : T/T,L/C

Delivery Time : 10-90 DAYS

Packaging Details : ply-wooden case

Material : Super Duplex Stainless Steel

Surface Treatment : Pickling, Polishing, Bright Annealing

Size : Customized

Corrosion Resistance : Excellent

High Temperature Resistance : Yes

Application : Heat Exchanger

Wall Thickness : Customized

NDT : HT, ECT

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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)

Element Content (%)
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) ≤ 1.2
Carbon (C) ≤ 0.030
Silicon (Si) ≤ 0.80
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.020
Iron (Fe) Balance

Mechanical Properties:

Property Typical Value
Tensile Strength ≥ 795 MPa
Yield Strength (0.2%) ≥ 550 MPa
Elongation ≥ 15%
Hardness (HRB) ≤ 100

ASTM A789 S32750 Super Duplex Stainless Steel Seamless Tube


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