ASTM A789 2205 Duplex Stainless Steel Precision Pipe Seamless Corrosion Resistant
Price:
Negotiable (Request a Quote)
MOQ:
100kg
Delivery Time:
15-25days
Brand:
Baosteel，TISCO
Product Description
ASTM A789 2205 duplex seamless tube is a standard specification for seamless duplex stainless steel tubes intended for general corrosion-resistant and high-strength applications. Grade 2205 (UNS S32205 / S31803) is the most widely used duplex stainless steel, offering approximately twice the yield strength of common austenitic grades like 304 or 316, combined with excellent resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion.
These tubes are ideal for heat exchangers, condensers, instrumentation lines, hydraulic lines, and other critical services in oil & gas, chemical processing, marine, and desalination industries.
Key Specifications
| Parameter | Range / Details |
|---|---|
| Standard | ASTM A789 / ASME SA789 |
| Manufacturing Type | Seamless / Welded |
| Available Grades | UNS S31803, S32205, S32750, S32760, and others |
| Outside Diameter (OD) | 6.0 mm – 610 mm (0.236″ – 24″) |
| Wall Thickness (WT) | 0.5 mm – 30 mm (Average Wall or Minimum Wall) |
| Length | Fixed length or random length (standard 6000 mm) |
| Delivery Condition | Annealed & Pickled (AP), Bright Annealed (BA) |
| Shape | Round, Coiled Tubing |
| Manufacturing Process | Cold Rolling, Cold Drawn |
Main Grades & Performance Characteristics
UNS S31803 / S32205 (2205 Duplex Steel)
- Chemical Composition: Cr 21–23% / 22–23%, Mo 2.5–3.5% / 3.0–3.5%, Ni 4.5–6.5%, N 0.08–0.20%
- Characteristics: Typical duplex stainless steel offering excellent strength and resistance to chloride stress corrosion cracking. S32205 is often supplied as a dual grade with S31803.
- Equivalent Grades: EN 1.4462, AISI 2205
- Applications: Chemical vessels, piping, heat exchangers, seawater systems
UNS S32750 (2507 Super Duplex Steel)
- Chemical Composition: Cr 24–26%, Mo 3–5%, Ni 6–8%, N 0.24–0.32%
- Characteristics: Super duplex stainless steel with extremely high pitting and crevice corrosion resistance. PREn (Pitting Resistance Equivalent Number) typically >40.
- Equivalent Grades: EN 1.4410, SAF 2507, F53
- Applications: Marine engineering, desalination, oil & gas extraction, sour media
UNS S32760 (Super Duplex Steel)
- Chemical Composition: Cr 24–26%, Mo 3–4%, Ni 6–8%, N 0.20–0.30%, with Cu and W additions
- Characteristics: Similar to S32750, with additional copper and tungsten to enhance corrosion resistance in specific environments.
- Equivalent Grades: EN 1.4501, F55, Zeron 100
- Applications: Subsea pipelines, seawater pump shafts, chemical processing equipment
Duplex Stainless Steel Equivalent Grades
| Steel Name | EN Number | UNS | AISI / Trade Name |
|---|---|---|---|
| X2CrMnNiN21-5-1 | 1.4162 | S32101 | 2101 LDX |
| X2CrNiN23-4 | 1.4362 | S32304 | 2304 |
| X2CrNiMoN12-5-3 | 1.4462 | S31803 / S32205 | 2205 |
| X2CrNiMoN25-7-4 | 1.4410 | S32750 | 2507 |
| X2CrNiMoCuWN25-7-4 | 1.4501 | S32760 | Zero 100 |
Chemical Composition (per ASTM A789, wt%)
| UNS Designation | C ≤ | Mn ≤ | P ≤ | S ≤ | Si ≤ | Ni | Cr | Mo | N | Cu | Others |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S31803 | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | — | — |
| S32205 | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | — | — |
| S32750 | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 6.0–8.0 | 24.0–26.0 | 3.0–5.0 | 0.24–0.32 | 0.50 | — |
| S32760 | 0.030 | 1.00 | 0.030 | 0.010 | 1.00 | 6.0–8.0 | 24.0–26.0 | 3.0–4.0 | 0.20–0.30 | 0.50–1.00 | W 0.50–1.00 |
Mechanical Properties
| Property | S31803 / S32205 | S32750 / S32760 |
|---|---|---|
| Tensile Strength (MPa), min | 620 | 800 |
| Yield Strength (MPa), min | 450 | 550 |
| Elongation %, min | 25 | 15 |
| Hardness (HRC), max | 30 | 32 |
Typical Tube Dimensions (Common Stock Sizes)
| OD (mm) | WT (mm) | Length (m) | Application |
|---|---|---|---|
| 12.7 | 1.65 | 6.0 | Instrumentation |
| 19.05 | 2.11 | 6.0 | Hydraulic lines |
| 25.4 | 2.77 | 6.0 | Heat exchanger |
| 33.4 | 3.38 | 6.0 | Process piping |
| 48.3 | 3.68 | 6.0 | General service |
| 60.3 | 4.0 | 6.0 | Corrosive service |
| 88.9 | 5.0 | 6.0 | High-pressure |
| 114.3 | 6.0 | 6.0 | Structural / process |
Applications
Oil & Gas
- Subsea instrumentation and hydraulic lines
- Downhole tubing and control lines
- Process piping and manifolds
- Heat exchangers and coolers
Chemical Processing
- Heat exchanger tubes
- Condenser tubes
- Reactor and vessel internals
- Transfer lines for corrosive media
Marine & Desalination
- Seawater cooling systems
- Desalination plant tubing
- Hydraulic and control lines on offshore platforms
Other Industries
- Pulp and paper processing
- Food and beverage (certain applications)
- Pharmaceutical equipment (limited)
Tube Finishes
| Finish | Description | Application |
|---|---|---|
| Pickled | Oxide scale removed, matte surface | General industrial |
| Annealed | Softened, ready for further processing | Heat exchangers, forming |
| Polished | Smooth surface finish | Instrumentation, food |
| Bright Annealed | Clean, shiny surface | Decorative, clean service |
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Company
Shanxi Zhongcheng Metal Co., Ltd.
Location
Room 2, No. 221 Tianzhang Avenue, Fengdong New City, Xi'an, Shaanxi Province
Contact Person
Zhongcheng Metal