Quality identification standards for 2205 stainless steel pipes
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If you are searching for high-quality 2205 duplex stainless steel pipes for industrial, chemical, or marine applications, we can provide a wide range of seamless and welded 2205 pipes with certified quality and consistent performance.
Our pipes meet international standards and are designed for demanding environments, including oil & gas, chemical processing, desalination, power plants, and offshore engineering.
🔹What Are 2205 Stainless Steel Pipes?
2205 duplex stainless steel (UNS S32205 / S31803) is a high-strength, corrosion-resistant duplex alloy, combining the advantages of austenitic and ferritic stainless steels.
🔹Key Features:
🔹High corrosion resistance against chlorides, acids, and alkaline environments
🔹Excellent mechanical properties, including high yield and tensile strength
🔹Duplex structure: approximately 50% ferrite + 50% austenite
🔹Standards: ASTM A789 / A790 (tubes), ASTM A312 (pipes), EN 10222-5 / EN 1.4462
Quality Identification Standards for 2205 Stainless Steel Pipes
To ensure you receive genuine 2205 duplex pipes, always verify the following:
| Quality Aspect | Standard / Test |
|---|---|
| Chemical Composition | ASTM A240 / A789, EN 1.4462, UNS S32205 |
| Mechanical Properties | ASTM A790 / EN 10222-5 |
| Dimensions & Tolerances | ASTM A312, EN 10216-5 |
| Heat Treatment | Solution annealed (SA) at 1050–1100°C, followed by rapid cooling |
| Corrosion Tests | Pitting / Crevice corrosion resistance per ASTM G48 |
| Certification | EN 10204 3.1 Mill Test Certificate (MTC) |
| Traceability | Heat number verification for full material traceability |
2205 Duplex Stainless Steel pipe Chemical Composition (%)
| Element | 2205 Duplex Stainless Steel |
|---|---|
| C | ≤0.03 |
| Mn | ≤2.0 |
| Si | ≤1.0 |
| P | ≤0.035 |
| S | ≤0.02 |
| Cr | 21–23 |
| Mo | 2.5–3.5 |
| Ni | 4.5–6.5 |
| N | 0.08–0.20 |
| Fe | Balance |
2205 SS pipe Mechanical Properties
| Property | 2205 Duplex Stainless Steel |
|---|---|
| Tensile Strength (MPa) | 620–850 |
| Yield Strength (MPa) | 450–550 |
| Elongation (%) | 25–35 |
| Hardness (HRB) | 92–95 |
GNEE professionally supplies ASTM A790/A928 standard 2205 (UNS S31803/S32205) duplex stainless steel pipes, including seamless and welded types, with outer diameters ranging from 6-630mm and wall thicknesses from 1.5-40mm. We support custom cutting to lengths of 3-12m and non-standard size customization. The corrosion rate in high-chloride environments is ≤0.003mm/year; its mechanical properties far exceed those of 316L, with a tensile strength ≥620MPa and yield strength ≥450MPa, more than twice that of ordinary austenitic stainless steel. It combines the high toughness of austenite with the high strength of ferrite, and maintains structural stability under operating conditions from -50℃ to 280℃.
Dimensions & Pipe Range
|
Type |
OD Range | Wall Thickness | Length |
|---|---|---|---|
| Seamless | 6 mm – 219 mm | 0.3 mm – 14 mm | Cut-to-size / standard 6 m |
| Welded | 10 mm – 406 mm | 0.5 mm – 20 mm | Cut-to-size / standard 6 m |
| U-bends | Customized | Customized | Per project requirement |
Inspection & Quality Assurance
Mill Test Certificate (MTC) ISO 9001 for each batch
Optional third-party inspection: SGS, BV, TUV, DNV
In-house QC: Surface quality, straightness, dimensional tolerances, and mechanical properties verification
Delivery Time
Standard stock orders: 3–7 days
Custom sizes or large-volume orders: 10–20 days depending on quantity
Urgent projects: Partial shipment options available
Packaging and Transportation
Multi-layer moisture-proof packaging: protective film, wooden crates, ISO-standard pallets
Seaworthy export packaging for long-distance shipping
Labeling: Each pipe clearly marked with grade, size, and heat number
Shipping options: Sea freight, air freight, or express courier
