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S32205 Duplex Stainless Steel Tube - China Suppliers & Factory - Fast Delivery Available
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 & Fabrication
- High Strength-to-Weight Ratio: Doubles the yield strength of standard austenitic steels (e.g., 304/316), allowing thinner/lighter designs.
- 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
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
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
Delivery Condition:
Cold Drawn, Annealed and Pickled/ Polished /Bright Annealed/ Sand blasting/ Shot Blasting.
Marking:
All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the 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
| 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)
| 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
| 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
Q1: What is S32205 duplex stainless steel?
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 that provides high strength and excellent corrosion resistance.
Q2: How does S32205 compare to standard austenitic stainless steels?
S32205 offers approximately double the yield strength of standard austenitic steels like 304 or 316. This high strength-to-weight ratio allows for thinner and lighter designs without sacrificing structural integrity.
Q3: What are the main applications of S32205?
It is primarily used in hygienic and high-purity environments, including the pharmaceutical and biotechnology industries, the food and beverage industry, cosmetics and personal care production, high-purity water systems, and hygienic mechanical systems.
Q4: What is the corrosion resistance performance of S32205?
S32205 has superior resistance to chloride pitting and crevice corrosion compared to 316L and 317L (with a PREN ≥35). It is also highly immune to stress corrosion cracking (SCC) in chloride-rich environments and performs well in acidic and alkaline solutions.
Q5: What are the welding and heat treatment recommendations for S32205?
Welding S32205 requires controlled heat input using 2209 filler metal. For heat treatment, solution annealing should be performed at 1020–1100°C, followed by rapid cooling to restore the balanced phase microstructure.
Q6: Under what standards is S32205 material specified?
S32205 is commonly manufactured to specifications such as ASTM A270/A270M and ASTM A269/A269M. It has equivalent designations globally, including EN 1.4462, ISO X2CrNiMoN22-5-3, and Chinese GB 022Cr22Ni5Mo3N.