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S32205 Duplex Stainless Steel Tube - Professional China Suppliers & Factory for Immediate Shipment
Introduction
S32205 (UNS S32205) is a 22%-23% chromium, 4.5%-6.5% nickel, 3%-3.5% molybdenum duplex stainless steel with a balanced austenite-ferrite microstructure (~50/50 phase balance). It combines high strength, excellent corrosion resistance (especially against chloride stress corrosion cracking), and good weldability.
Key Features
Corrosion Resistance
Chloride Resistance: Superior to 316L and 317L; resists pitting/crevice corrosion (PREN ≥35).
Stress Corrosion Cracking (SCC): Immune in chloride-rich environments.
Acid/Alkali Resistance: Performs well in sulfuric, phosphoric acids, and alkaline solutions.
Stress Corrosion Cracking (SCC): Immune in chloride-rich environments.
Acid/Alkali Resistance: Performs well in sulfuric, phosphoric acids, and alkaline solutions.
High Strength-to-Weight Ratio
Doubles the yield strength of standard austenitic steels (e.g., 304/316), allowing thinner/lighter designs.
Fabrication & Welding
Welding: Requires controlled heat input; use 2209 filler metal.
Heat Treatment: Solution annealing at 1020–1100°C followed by rapid cooling.
Cold Working: Possible but requires annealing to restore phase balance.
Heat Treatment: Solution annealing at 1020–1100°C followed by rapid cooling.
Cold Working: Possible but requires annealing to restore phase balance.
Material Specification
Standard
ASTM A270/A270M
O.D
1/8" NB TO 32" NB, (10.29MM-812.80MM), (Customization Available)
W.T
SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS (Customization Available)
Application
Pharmaceutical and Biotechnology
Food and Beverage Industry
Cosmetics and Personal Care
High-Purity Water Systems
Hygienic Mechanical Systems
Food and Beverage Industry
Cosmetics and Personal Care
High-Purity Water Systems
Hygienic Mechanical Systems
End
Plain End, Beveled End, Threaded
Processing
Cut-to-length; Polishing.
Inspection
100% PMI TESTED
EN10204.3.1B MILL TEST CERTIFICATE
THIRD PARTY INSPECTION ACCEPTED
EN10204.3.1B MILL TEST CERTIFICATE
THIRD PARTY INSPECTION ACCEPTED
Delivery Condition
Cold Drawn, Annealed and Pickled / Polished / Bright Annealed / Sand blasting / Shot Blasting.
Marking
All SS SMLS Pipes are marked: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per customer's request)
Packing
Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests
Specials
Sizes and Specifications other than above can be customized on request.
Specification Parameters
S32205 Chemical Composition
| HEAT NO. | CHEMICAL COMPOSITION (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Ni | Cr | Mo | N | ||
| STAND. | MIN. | - | - | - | - | - | 4.50 | 22.00 | 3.00 | 0.14 |
| MAX. | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 6.50 | 23.00 | 3.50 | 0.20 | |
S32205 Mechanical Properties
| Mechanical Properties | |||||
|---|---|---|---|---|---|
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness (HRW) | |
| S32205 | 655 | 485 | 25 | C30.5 | |
Equivalent Grades - (ASTM A270/A270M S32205 Equivalent Grades)
| ASTM A270/A270M S32205 (UNS S32205) Equivalent Grades | ||||||
|---|---|---|---|---|---|---|
| ISO | EN (Europe) | DIN (Germany) | JIS (Japan) | GB (China) | UNS (USA) | Common Name |
| X2CrNiMoN22-5-3 (ISO 15510) | 1.4462 (EN 10088-2) | X2CrNiMoN22-5-3 (DIN 17440) | SUS 329J3L (JIS G3463) | 022Cr22Ni5Mo3N (GB/T 21833) | S32205 | 2205 (Duplex) |
ASTM A269/A269M Standard Cold Machining Size Deviation Permitted
| ASTM A269/A269M Standard cold machining size deviation permitted | ||||||
|---|---|---|---|---|---|---|
| Group | Size, Outside Diameter, in. [mm] | Permissible Variations in Outside Diameter, in. [mm] | Permissible Variations in Wall Thickness, A% | Permissible Variations in Cut Length, in. [mm] B | Thin Walled Tubes C | |
| Over | Under | |||||
| 1 | Up to 1/2 [13] | ±0.005 [0.13] | ±15 | 1/8 [3.2] | 0 | ... |
| 2 | 1/2 to 1 1/2 [13 to 38], excl | ±0.005 [0.13] | ±10 | 1/8 [3.2] | 0 | less than 0.065 in. [1.65 mm] nominal |
| 3 | 1 1/2 to 3 1/2 [38 to 89], excl | ±0.010 [0.25] | ±10 | 3/16 [4.8] | 0 | less than 0.095 in. [2.41 mm] nominal |
| 4 | 3 1/2 to 5 1/2 [89 to 140], excl | ±0.015 [0.38] | ±10 | 3/16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 5 | 5 1/2 to 8 [140 to 203], excl | ±0.030 [0.76] | ±10 | 3/16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 6 | 8 to 12 [203 to 305], excl | ±0.040 [1.01] | ±10 | 3/16 [4.8] | 0 | less than 0.200 in. [5.08 mm] nominal |
| 7 | 12 to 14 [305 to 356], excl | ±0.050 [1.26] | ±10 | 3/16 [4.8] | 0 | less than 0.220 in. [5.59 mm] nominal |
Frequently Asked Questions (FAQ)
What is S32205 duplex stainless steel?
S32205 (UNS S32205) is a duplex stainless steel with a chemical composition of 22%-23% chromium, 4.5%-6.5% nickel, and 3%-3.5% molybdenum. It features a balanced 50/50 austenite-ferrite microstructure, providing high strength, excellent corrosion resistance, and good weldability.
How does S32205 compare to 316L and 317L in terms of corrosion resistance?
S32205 offers superior chloride corrosion resistance compared to standard 316L and 317L grades, with a Pitting Resistance Equivalent Number (PREN) of ≥35. It is also highly immune to stress corrosion cracking (SCC) in chloride-rich environments.
What are the primary applications of S32205 tubes?
S32205 tubes are widely used in sanitary, hygienic, and high-purity mechanical systems, including the Pharmaceutical and Biotechnology industries, Food and Beverage processing, Cosmetics, Personal Care, and High-Purity Water Systems.
What are the standard mechanical properties of S32205?
According to specifications, S32205 has a minimum tensile strength of 655 MPa, a minimum 0.2% proof yield strength of 485 MPa, a minimum elongation of 25% (in 50mm), and a typical hardness value of HRW C30.5.
What are the welding requirements for S32205 duplex stainless steel?
Welding S32205 requires strictly controlled heat input to maintain the phase balance. It is recommended to use 2209 filler metal during the welding process. After critical cold working, solution annealing at 1020–1100°C followed by rapid cooling is required.
What equivalent international grades exist for S32205?
S32205 (UNS S32205) equivalents include 1.4462 (EN 10088-2), X2CrNiMoN22-5-3 (ISO 15510 / DIN 17440), SUS 329J3L (JIS G3463), and 022Cr22Ni5Mo3N (GB/T 21833). It is commonly referred to as 2205 Duplex.