1.4462 duplex 2205 stainless steel pipe
Jul 21, 2025
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If you're looking for high-performance stainless steel piping that can handle extreme conditions-whether it's high pressure, aggressive chemicals, or seawater-1.4462 duplex 2205 stainless steel pipe is an ideal choice. This duplex alloy combines the best of both austenitic and ferritic stainless steels, offering exceptional mechanical strength and outstanding corrosion resistance.
What Is Stainless Steel 1.4462 Pipe?
Stainless steel 1.4462 pipe refers to seamless or welded pipes made from the EN 1.4462 material, also known as Duplex 2205. This duplex-grade stainless steel contains approximately 22% chromium, 5–6.5% nickel, and 3% molybdenum, delivering excellent resistance to chloride stress corrosion cracking, pitting, and crevice corrosion. The duplex structure provides twice the yield strength of standard 304/316 stainless steel, making it ideal for demanding applications such as offshore platforms, desalination plants, heat exchangers, and chemical process systems.
What Is 1.4462 Duplex Stainless Steel Equivalent To?
EN 1.4462 is the European equivalent of several international duplex stainless steel grades. Its most common equivalents include:
| Standard | Grade Equivalent |
|---|---|
| UNS | S31803 / S32205 |
| ASTM | ASTM A790 / A789 / A928 |
| DIN/EN | 1.4462 / X2CrNiMoN22-5-3 |
| ISO | 2205 Duplex Stainless Steel |
The UNS S32205 version has tighter composition controls than S31803, improving corrosion resistance. Both are often interchangeably referred to as Duplex 2205, suitable for piping and pressure vessel applications under various global codes.
Duplex Steel 2205 Pipe Composition Chart
| C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 - 3.5 | 22.0 - 23.0 | 0.03 | 4.5 - 6.5 | 0.14 - 0.2 | Bal |
Alloy 2205 UNS S32205 Pipe Mechanical Behaviour
| Pipe Density | Pipe Melting Point | Yield Strength (0.2%Offset) | 2205 Duplex SS Pipe Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi - 80000 , MPa - 550 | Psi - 116000 , MPa - 800 | 15 % |
2205 duplex stainless steel Pipe Pressure Rating
| Pipe O.D. (In.) |
Wall Thickness Of Pipe (Inches) | |||||||
|---|---|---|---|---|---|---|---|---|
| .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 | |
| Working Pressure (Psig) | ||||||||
| 1/8 | 7900 | 10100 | ||||||
| 1/4 | 3700 | 4800 | 7000 | 9500 | ||||
| 5/16 | 3700 | 5400 | 7300 | |||||
| 3/8 | 3100 | 4400 | 6100 | |||||
| 1/2 | 2300 | 3200 | 4400 | |||||
| 3/4 | 2200 | 3000 | 4000 | 4600 | ||||
| 1 | 2200 | 2900 | 3400 | 3900 | 4300 | |||
UNS S32205 vs S31803 Stainless Steel Pipe: What's the Difference?
Both UNS S32205 and S31803 refer to Duplex 2205 stainless steel, but S32205 is a refined version with tighter control over the chemical composition, particularly for nitrogen, chromium, and molybdenum content. This enhanced consistency gives S32205 stainless steel pipe better corrosion resistance and mechanical strength, especially in aggressive environments such as seawater or chemical processing systems. While both are commonly used and often interchangeable, S32205 is the preferred choice for critical applications that require higher performance and compliance with the most stringent standards.
SAF 2205 Pipe Applications
Offshore oil and gas pipelines
Desalination and water treatment systems
Chemical process piping
Heat exchangers and pressure vessels
Marine structures and ballast systems
Structural tubing in corrosive environments
Real-World Case: Duplex Piping for Coastal Desalination Plant
A large-scale desalination facility in the Middle East required corrosion-resistant piping capable of withstanding high salinity and extreme heat. GNEE supplied over 60 tons of EN 1.4462 duplex 2205 stainless steel pipes, meeting both ASTM A790 and PED 2014/68/EU standards. The duplex pipes outperformed traditional 316L in both strength and chloride resistance, extending service life and reducing maintenance costs by over 30% .
Alloy 2205 Pipe Wall Thickness
| Types | Out diameter | Wall thickness | Length |
|---|---|---|---|
| NB Sizes (in stock) | 1/8" ~ 8" | SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 | Upto 6 Meters |
| Duplex 2205 Seamless Pipe (Custom Sizes) | 5.0mm ~ 203.2mm | As per requirement | Upto 6 Meters |
| Duplex 2205 Welded Pipe (in Stock + Custom Sizes) | 5.0mm ~ 1219.2mm | 1.0 ~ 15.0 mm | Upto 6 Meters |
GNEE Steel is a leading DIN 1.4462 Stainless Steel Pipe stockist, distributor and supplier in China. With over 15 years of experience, we have a deep understanding of the steel industry and have extensive experience supplying major industries around the world. We have a professional team and a strict quality policy to ensure that we provide first-class products that meet and exceed customer expectations.
Here are the advantages of choosing GNEE Steel:
✔️ Full certification: EN 10216-5, ASTM A790, ISO 15156, NACE MR0175
✔️ Size range: ½" to 24" OD, SCH10–SCH160, seamless & welded
✔️ Third-party inspection: BV, SGS, TUV, DNV
✔️Fast delivery of 20~40days for general grades
✔️Both seamless and welded pipe are available
✔️Perfect inspection system – 100% NDT test, mechanical propertis test, MPI test
Contact GNEE Stainless Steel for 1.4462 duplex 2205 stainless steel pipe solutions tailored to your project.
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