HomeProducts & servicesUNS S33207/3207/1.4658 Seamless Hyper Duplex Steel Pipe

UNS S33207/3207/1.4658 Seamless Hyper Duplex Steel Pipe

UNS S33207 Seamless Hyper Duplex Steel Pipe designed for exceptional strength, corrosion resistance, and toughness, especially in highly aggressive environments. As a seamless pipe, it offers superior structural integrity and uniform properties across the cross-section.
Manufacturing Process: Seamless (hot finished / cold drawn)

Standards: ASTM A790 / ASME SA790, NORSOK MDS, ISO, EN equivalents

Size Range: ½” to 24” OD (or custom sizes on request)

Schedules: SCH 10 – SCH XXS

UNS S33207/3207/1.4658 Applications

UNS S32707, is a hyper-duplex stainless steel designed for severe chloride-containing environments. Let’s explore its applications in various industries:

  1. Marine Engineering:
    • Commonly used in marine engineering due to its excellent corrosion resistance.
    • It finds applications in marine fixtures, pump and mixer shafts, and other components exposed to saltwater environments.
  2. Furnaces and Gas Turbines:
    • In high-temperature applications, such as furnaces and gas turbines, UNS S32707 offers increased mechanical properties.
    • Its combination of strength and corrosion resistance ensures reliable performance in extreme heat conditions.
  3. Chemical Processing Plants:
    • The alloy is employed in chemical processing equipment, including reactors and heat exchangers.
    • Its resistance to aggressive chemical environments makes it valuable in handling corrosive substances.
  4. Boiler and Pressure Vessels:
    • UNS S32707 extends safe operating conditions in chloride-containing acidic environments.
    • It is suitable for use in critical heat exchangers in oil refineries and other pressure vessels.
  5. Nuclear Power Plants:
    • The improved corrosion resistance makes it interesting for nuclear power plant components.
    • It ensures safety and longevity in challenging environments.


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Standards: ASTM A789 / ASTM A790, ASME SA789 / SA790, EN 10216-5

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