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

UNS S33207/3207/1.4658 Seamless Hyper Duplex Steel Tube

UNS S33207 Seamless Hyper Duplex Steel Tube 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 A789 / ASME SA789, NORSOK MDS, ISO, EN equivalents

Size Range: ½” to 10” OD (or custom sizes on request)

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 of Sandvik SAF 2707 HD makes it interesting for nuclear power plant components.
    • It ensures safety and longevity in challenging environments.


Related Products

UNS S32304/Duplex Alloy 2304/1.4362 Seamless Duplex Steel Pipe

UNS S32304 Seamless Duplex Steel Pipe,UNS S32304 also called Duplex 2304 or 1.4362 is a lean duplex stainless steel with a balanced austenite + ferrite microstructure. It provides higher strength than 304/316 austenitic stainless steels while maintaining good resistance to general corrosion, pitting, and stress corrosion cracking—at a more cost-effective alloying content.
As a seamless pipe, it delivers excellent uniformity, pressure resistance, and mechanical integrity.

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

Manufacturing Process: Seamless (hot finished / cold drawn)

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

Schedules: SCH 10 – SCH XXS

UNS S31803/1.4462 Seamless Duplex Steel Pipe

UNS S31803 seamless duplex steel pipe, also known as Duplex 2205, is a high-strength, corrosion-resistant pipe with a dual-phase microstructure of austenitic and ferritic stainless steel. It offers excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, particularly in chloride-rich environments like seawater.
Standards: ASTM A790 / ASME SA790, ASTM A789 / ASME SA789

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 S32760 Seamless Super Duplex Steel Tube

UNS S32760 Seamless Super Duplex Steel Tube, UNS S32760 is a high-performance super duplex stainless steel highly regarded for its exceptional strength and outstanding corrosion resistance, particularly in aggressive, chloride-containing environments. Seamless pipes made from this material are engineered for critical applications where reliability and longevity are paramount.
UNS S32760's primary advantage is its excellent resistance to various forms of corrosion.
• Pitting and Crevice Corrosion: This grade boasts a high Pitting Resistance Equivalent Number (PREN), calculated as PREN = %Cr + 3.3(%Mo + 0.5%W) + 16%N. With a PREN value typically exceeding 41, it offers outstanding resistance to localized corrosion in seawater and other chloride-rich media.
• Stress Corrosion Cracking (SCC): The duplex structure provides excellent resistance to chloride-induced SCC, a common vulnerability for standard austenitic stainless steels.
• Sour Service: It is resistant to sulfide stress cracking in sour gas environments, making it suitable for oil and gas applications.

① STANDARD: ASTM A789/ ASTM A790/ ASTM A928/ ...

② OD RANGE : 6-720 MM

③ THICKNESS RANGE: 1-65 MM

Online Inquiry

If you have any enquiry about quotation or cooperation,please feel free to email us at or use the following enquiry form. Our sales will contact you within 24 hours. Thank you for your interest in our products.