EN 10216-5 Seamless Duplex & Super Duplex Stainless Steel Tubes
W.Nr. 1.4462 / 1.4410 / 1.4501 | PED Certified Pressure Tubing
EN 10216-5 seamless stainless steel tubes in W.Nr. 1.4462, 1.4410, and 1.4501 are high-performance duplex and super duplex grades designed for pressure purposes under the European PED directive. These seamless tubes provide an exceptional combination of high yield strength, superior corrosion resistance, and long-term structural reliability in aggressive chloride-containing environments.
Manufactured in strict compliance with EN 10216-5, these tubes are widely used in offshore oil & gas platforms, subsea pipelines, desalination systems, chemical processing plants, and high-pressure marine applications.
They are widely used in offshore oil & gas, chemical processing, desalination, power generation, and marine engineering.
What Is EN 10216-5?
EN 10216-5 is the European standard for seamless stainless steel tubes for pressure purposes.
It specifies requirements for:
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Austenitic, duplex, and super duplex stainless steel tubes
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Chemical composition
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Mechanical properties
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Delivery condition
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Dimensional tolerances
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Testing and inspection
Download EN 10216-5 standard in PDF
Material Grades
🔹 EN 1.4462 (X2CrNiMoN22-5-3)
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Equivalent to UNS S31803 / S32205
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Duplex stainless steel
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Excellent resistance to chloride stress corrosion cracking
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High strength compared to austenitic stainless steel
Typical applications: offshore piping, heat exchangers, chemical plants
🔹 EN 1.4410 (X2CrNiMoN25-7-4)
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Equivalent to UNS S32750
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Super duplex stainless steel
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High pitting resistance (PREN ≥ 40)
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Excellent performance in seawater and subsea environments
Typical applications: subsea pipelines, seawater systems, desalination plants
🔹 EN 1.4501 (X2CrNiMoCuWN25-7-4)
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Equivalent to UNS S32760
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Enhanced super duplex stainless steel (with W & Cu)
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Superior resistance to pitting, crevice corrosion, and erosion corrosion
Typical applications: severe offshore, marine, and chemical processing service
Product Form & Manufacturing
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Product Type: Seamless stainless steel tube
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Manufacturing Process: Hot finished / cold drawn
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Delivery Condition: Solution annealed & quenched (+AT)
Size Range & Specifications
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Outside Diameter: 6.0 mm – 660 mm
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Wall Thickness: 1.0 mm – 100 mm
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Length: Random length or fixed length
(Custom dimensions available on request)
PREN Comparison (Pitting Resistance Equivalent Number)
| Grade | PREN Value |
|---|---|
| 1.4462 | ≥ 35 |
| 1.4410 | ≥ 40 |
| 1.4501 | ≥ 40+ |
Higher PREN indicates improved resistance to localized corrosion in chloride-rich environments.
PREN formula:
PREN = %Cr + 3.3(%Mo) + 16(%N)
Chemical composition (cast analysis) ᵃ of austenitic-ferritic steels in % by mass
| Steel name | Steel number | C max | Si | Mn | P max | S max | N | Cr | Cu | Mo | Ni | Others |
| X2CrNiMoN22-5-3 | 1.4462 | 0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 0.10–0.22 | 21.00–23.00 | – | 2.50–3.50 | 4.50–6.50 | – |
| X2CrNiMoSi18-5-3 | 1.4424 | 0.030 | 1.40–2.00 | 1.20–2.00 | 0.035 | 0.015 | 0.05–0.10 | 18.00–19.00 | – | 2.50–3.00 | 4.50–5.20 | – |
| X2CrNiN23-4 | 1.4362 | 0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 0.05–0.20 | 22.00–24.00 | 0.10–0.60 | 0.10–0.60 | 3.50–5.50 | – |
| X2CrNiMoN25-7-4 | 1.4410 | 0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 0.20–0.35 | 24.00–26.00 | – | 3.00–4.50 | 6.00–8.00 | – |
| X2CrNiMoCuN25-6-3 | 1.4507 | 0.030 | ≤0.70 | ≤2.00 | 0.035 | 0.015 | 0.15–0.30 | 24.00–26.00 | 1.00–2.50 | 2.70–4.00 | 5.50–7.50 | – |
| X2CrNiMoCuWN25-7-4 | 1.4501 | 0.030 | ≤1.00 | ≤1.00 | 0.035 | 0.015 | 0.20–0.30 | 24.00–26.00 | 0.50–1.00 | 3.00–4.00 | 6.00–8.00 | W: 0.50–1.00 |
Mechanical Properties (Typical, Room Temperature)
| Grade | Yield Strength (min) | Tensile Strength |
|---|---|---|
| 1.4462 | ≥ 450 MPa | 620 – 880 MPa |
| 1.4410 | ≥ 550 MPa | ≥ 800 MPa |
| 1.4501 | ≥ 550 MPa | ≥ 800 MPa |
Heat Treatment
EN 10216-5 duplex and super duplex tubes are supplied in the solution annealed condition, ensuring:
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Correct ferrite–austenite balance
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Maximum corrosion resistance
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Stable mechanical properties
Testing & Inspection
All EN 10216-5 seamless tubes are supplied with full inspection, including:
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Chemical analysis
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Tensile testing
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Impact testing (when specified)
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Eddy current or hydrostatic testing
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Ferrite content testing (duplex grades)
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Dimensional and visual inspection
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Certification: EN 10204 3.1 / 3.2
Typical Applications
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Offshore oil & gas platforms
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Subsea pipelines and risers
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Seawater and desalination systems
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Chemical and petrochemical plants
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Heat exchangers and pressure piping
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Power generation and marine systems
EN 10216-5 vs ASTM Standards
| EN Grade | ASTM / UNS Equivalent |
|---|---|
| 1.4462 | ASTM A790 UNS S32205 |
| 1.4410 | ASTM A790 UNS S32750 |
| 1.4501 | ASTM A790 UNS S32760 |
EN 10216-5 seamless tubes in W.Nr. 1.4462, 1.4410, and 1.4501 provide outstanding strength, corrosion resistance, and long-term reliability for pressure and aggressive service environments. Fully compliant with European PED requirements, these duplex and super duplex stainless steel tubes are the preferred choice for offshore, marine, chemical, and desalination applications
FAQ
What is the difference between 1.4410 and 1.4501?
1.4501 contains tungsten and copper, providing enhanced resistance to localized corrosion compared to 1.4410.
Are EN 10216-5 tubes PED certified?
Yes, EN 10216-5 tubes are manufactured for pressure purposes and can be supplied with PED documentation.
What is the PREN value of 1.4462?
The PREN value of 1.4462 is typically ≥ 35.
Can EN 10216-5 tubes be used in seawater?
Yes, especially 1.4410 and 1.4501, which are super duplex grades suitable for seawater and subsea environments.
