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S32205 Duplex Stainless Steel Tube Supplier in China - Factory Stock 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.
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.
Material Specification
Standard
ASTM A270/A270M
Outer Diameter (O.D)
1/8" NB TO 32" NB (10.29MM-812.80MM), Customization Available
Wall Thickness (W.T)
SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS, Customization Available
Applications
- Pharmaceutical and Biotechnology
- Food and Beverage Industry
- Cosmetics and Personal Care
- High-Purity Water Systems
- Hygienic Mechanical Systems
Ends
Plain End, Beveled End, Threaded
Processing
Cut-to-length, Polishing
Inspection
- 100% PMI TESTED
- 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
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 Customer's Request
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 the chemical composition of S32205 duplex stainless steel?
S32205 is composed of 22%-23% Chromium, 4.5%-6.5% Nickel, 3%-3.5% Molybdenum, and 0.14%-0.20% Nitrogen, with maximum limits of 0.030% Carbon, 2.00% Manganese, 0.030% Phosphorus, 0.020% Sulfur, and 1.00% Silicon.
What are the mechanical properties of S32205?
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 hardness value of C30.5 HRW.
How does S32205 perform in corrosive environments?
S32205 offers excellent resistance to chloride pitting and crevice corrosion with a PREN ≥35, making it superior to 316L and 317L. It is immune to chloride stress corrosion cracking (SCC) and performs well in sulfuric, phosphoric acids, and alkaline solutions.
What equivalent grades correspond to S32205 under other standards?
Equivalents include ISO X2CrNiMoN22-5-3, EN 1.4462, DIN X2CrNiMoN22-5-3, JIS SUS 329J3L, and GB 022Cr22Ni5Mo3N. It is commonly known as Duplex 2205.
What are the main applications for S32205 pipes?
It is widely used in hygienic and high-purity industries, including Pharmaceutical and Biotechnology, Food and Beverage, Cosmetics and Personal Care, High-Purity Water Systems, and Hygienic Mechanical Systems.
What are the welding and heat treatment requirements for S32205?
Welding S32205 requires controlled heat input using a 2209 filler metal. The material should undergo solution annealing at 1020–1100°C followed by rapid cooling to maintain the balanced phase structure.