UNS S32550 Super Duplex Steel Pipes Manufacturer & Supplier in Thailand

Super duplex steel F61 seamless pipe is high-alloy, corrosion-resistant pipe made from ASTM A790 UNS S32550 alloy, known for its dual-phase (austenitic-ferritic) microstructure. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. specializes in high-quality Super Duplex Steel UNS S32550 seamless pipes, known for durability and performance in extreme environments. We provide customisation options, including different sizes, thicknesses, and pressure ratings to meet specific requirements. With advanced manufacturing technology and strict quality control, we ensure top-notch pipes that adhere to international standards.

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Product Overview: Super Duplex UNS S32550 Seamless Pipes

Super duplex UNS S32550 seamless pipes are known for their outstanding strength and corrosion resistance which makes them reliable for demanding industrial applications.The chemical composition of UNS S32550 includes elements like chromium, molybdenum and copper, which work together to provide excellent mechanical properties, even in harsh environments. These pipes are used in oil refineries, chemical processing plants, pul & paper industry and other various industries.

The seamless design of these pipes ensures better structural integrity, eliminating the risk of leaks often associated with welded pipes. Additionally, we offer customizable sizes and lengths to meet specific needs, ensuring that every customer gets precisely the Super Duplex pipe required for their project. These pipes are ideal for applications where reliability and performance are critical.

Key Features of UNS S32550 Seamless Pipes:

UNS S32550 seamless pipes offer benefits like ductility, wear & corrosion resistance and ease of fabrication, which are explained in detail below.

UNS S32550 pipes are highly resistant to corrosion in both acidic and chloride environments, making them suitable for use in marine, chemical, and offshore industries. Their high chromium, molybdenum, and nitrogen content offers enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking.

These pipes are designed to withstand high pressures and harsh working conditions. Their unique two-phase microstructure gives them superior tensile strength, which makes them ideal for applications requiring strength and reliability.

Super Duplex UNS S32550 pipes retain excellent ductility and toughness, even at low temperatures. This ensures that the pipes can endure impact and stress without failing, which is vital in many demanding applications.

With a high hardness and robust structure, these pipes offer excellent wear resistance. This makes them particularly useful in industries where equipment and pipes are subjected to abrasive conditions, such as in mining, chemical processing, and power generation.

UNS S32550 pipes are easy to fabricate, allowing for complex shapes and sizes to be created with ease. Their high strength and excellent machinability make them suitable for custom fittings, flanges, and other components in industrial systems.

These pipes offer exceptional weldability without compromising their mechanical properties. Whether for butt welds, socket welds, or other forms of joining, Super Duplex UNS S32550 pipes maintain strength and corrosion resistance at the weld zone, making them ideal for long-lasting, reliable installations.

Super Duplex UNS S32550 pipes are chemically versatile and can handle a wide range of aggressive environments, from acidic chemicals to high-pressure systems. This makes them suitable for use in the petrochemical, pharmaceutical, and food industries, where pipes must withstand a variety of harsh chemicals.

Why Choose Our Super Duplex S32550 Seamless Pipes

We offer top-quality ASTM-certified S32550 seamless pipes at competitive prices. Our products are backed by industry certifications, fast delivery, and excellent customer reviews. Trusted for consistent quality, we ensure timely service and strong client support, making us a preferred supplier.

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UNS S32550 Super Duplex Steel Seamless Pipes Specification

Find the complete specifications of UNS S32550 Super Duplex Steel Seamless Pipes, including available lengths, sizes, and dimensions for industrial applications

Grade	UNS S32550
Size	1/2" NB TO 30" NB
Standard	ASTM A790 / ASME SA790
Seamless Pipes	1/2" NB - 10" NB
Form	Round, Square, Rectangular, Hydraulic Etc
Schedule	SCH05, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Length	Single Random, Double Random & Cut Length
End	Plain End, Beveled End, Treaded
Test Certificate	MTC, IBR TC Lab TC from Govt. App. Lab. with Third Party Inspection

Equivalent Grades of S32550 Seamless Pipes

S32550 seamless pipes equivalent table includes international material codes, DIN numbers, and UNS designations.

Grade	UNS	Trade Name	DIN / EN	EN Designation	Brand Name
2507 Cu	S32550	ALLOY 255	1.4507	X2CrNiMoCuN25-6-3	FERRALIUM 255

Chemical Composition of ASTM A790 UNS S32550 Seamless Pipes

The ASTM A790 Seamless Pipes chemical composition table outlines percentages of major elements like carbon, chromium, nickel, molybdenum and more.

Grade	C	Mn	P	S	Si	Ni	Cr	Mo	N	Cu
S32550	≤0.04	≤1.50	≤0.040	≤0.03	≤1.00	4.50-6.50	24.00-27.00	2.90-3.90	0.10-0.25	1.50-2.50

Mechanical Properties S32550 Super Duplex Stainless Steel Seamless Pipes

The mechanical properties of S32550 Super Duplex Stainless Steel Pipes include key factors such as tensile strength, yield strength, and elongation, ensuring reliability under stress.

Parameter	Value
Yield 0.2 % (ksi/MPa), Min	550
Tensile (ksi/MPa), Min	750
Elongation (% in 50mm ), Min	25
Reduction in Area, %	55
Hardness (HB), Max	290

Physical Properties S32550 Super Duplex Stainless Steel Seamless Pipes

The physical properties of S32550 super duplex stainless steel Pipes, such as density, thermal conductivity, and melting point are mentioned below.

Parameter	Value
Density (Kg/m³)	7850
Elastic Modulus (GPa)	200
Co-eff of Expansion (µm/m/°C)	14.5
Thermal Condc. (W/m.K)	19
Electric Resistivity (nΩ.m)	850

Super Duplex Steel S32550 Seamless Pipes Manufacturing Process

The process of manufacturing super duplex Steel S32550 pipes is divided into five stages which is outlined below.

1. Raw Material Selection

High-quality super duplex stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.

2. Pipes Formation
The selected raw material is formed into pipes using seamless extrusion methods, depending on the application.

3. Heat Treatment
Pipes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working & Finishing
After heat treatment, pipes are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing
Every pipe is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Applications of Super Duplex Stainless Steel S32550 Seamless Pipes

Super Duplex Steel UNS S32550 Seamless Pipes are widely used in the offshore oil and gas industry for subsea piping and risers. They are ideal for transporting seawater and hydrocarbons under high pressure. These pipes are also used in desalination plants, chemical processing units, and marine engineering systems.

Oil and Gas Industry

Marine Applications

Chemical Industry

Petrochemical Industry

Power Plants

Aerospace & Defense

Automotive and Transportation

Desalination Plants

Pulp and Paper Industry

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FAQ

How do Super Duplex Steel UNS S32550 Seamless Pipes differ from standard Duplex Steel Pipes?

UNS S32550 Super Duplex Pipes have higher amounts of chromium and molybdenum than standard Duplex pipes (like UNS S32205). This gives the Super Duplex grade greater strength and enhanced resistance to corrosion, especially in environments containing chlorides. It is chosen for the most critical and aggressive applications.

Can Super Duplex Steel UNS S32550 Seamless Pipes be used in high-temperature applications?

No, Super Duplex Steel UNS S32550 Seamless Pipes should not be used in high-temperature applications. Exposure to temperatures above approximately 300 °C (572 °F) for extended periods can cause the material to become brittle. This is due to the formation of unwanted phases, which drastically reduces its impact strength and ductility.

What industries commonly use Super Duplex Steel UNS S32550 Seamless Pipes?

Industries that regularly use UNS S32550 Super Duplex Pipes include oil and gas, chemical processing, and marine applications. The material is ideal for pumps, valves, piping, and pressure vessels exposed to high-chloride environments like brackish water and seawater. Its high strength also makes it suitable for structural parts in offshore platforms.

What is the composition of Duplex SS 2205?

The composition of the widely used Duplex SS 2205 (UNS S32205/S31803) is roughly 22% chromium, 3% molybdenum, and 5% nickel. It also contains nitrogen, which boosts its strength and corrosion resistance. This balance provides a great combination of high strength and good corrosion resistance, making it the most common Duplex grade.

Can Super Duplex Steel UNS S32550 Seamless Pipes be welded easily?

UNS S32550 Super Duplex Seamless Pipes can be welded, but they require careful, controlled procedures. Welders must use specialized filler metal, control the heat input, and quickly cool the material. This strict control prevents the formation of intermetallic phases, ensuring the weld maintains the alloy’s strength and corrosion resistance.