Carlson 2205 (UNS S31803) Duplex Stainless Steel Wire

Carlson 2205 (UNS S31803) Duplex Stainless Steel Wire Product Information -:- For detailed product information, please contact sales. -: Carlson 2205 (UNS S31803) Duplex Stainless Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

Carlson 2205 (UNS S31803) Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** Carlson 2205 Duplex Stainless Steel (UNS S31803) **Introduction:** Carlson 2205 (UNS S31803) is a **workhorse duplex stainless steel** that defines the industry standard for duplex alloys. It combines a microstructure of roughly 50% ferrite and 50% austenite, offering an optimal balance of **high strength, excellent corrosion resistance, and cost-effectiveness**. This grade was developed to resist chloride stress corrosion cracking (SCC) and provide superior pitting and crevice corrosion resistance compared to standard austenitic grades like 316L, while maintaining good fabrication properties. It is the most widely used duplex stainless steel globally. **Key Features:** * **Exceptional Strength-to-Weight Ratio:** Yield strength is approximately **twice that of 316L austenitic stainless steel**, enabling significant weight and cost savings in pressure vessels, structural components, and piping systems. * **Superior Corrosion Resistance:** Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-containing environments like seawater and chemical process streams. * **Good Weldability and Fabricability:** Can be welded and fabricated using standard techniques with proper procedures and duplex-grade consumables. * **Cost-Effective Performance:** Offers a lower lifecycle cost than high-nickel alloys for many demanding applications, bridging the gap between standard stainless steels and more expensive super duplex and nickel alloys. --- **1. Chemical Composition (Typical Weight % - ASTM A240/A789)** The composition is carefully controlled to ensure a stable phase balance after solution annealing. | Element | Content (%) | Element | Content (%) | | :------------- | :---------- | :------------- | :---------- | | Chromium (Cr) | 21.0 - 23.0 | Nickel (Ni) | 4.5 - 6.5 | | Molybdenum (Mo)| 2.5 - 3.5 | Nitrogen (N) | 0.08 - 0.20 | | Manganese (Mn) | ≤ 2.00 | Copper (Cu) | ≤ 0.75* | | Silicon (Si) | ≤ 1.00 | Carbon (C) | ≤ 0.030 | | Phosphorus (P) | ≤ 0.030 | Sulfur (S) | ≤ 0.020 | | **Iron (Fe)** | **Balance** | | | *Note: UNS S32205, a closely related grade, has a narrower composition range with a minimum Mo content of 3.0% and a higher minimum N content (0.14-0.20%) for enhanced pitting resistance. S31803 is the more common and accepted standard grade.* --- **2. Physical & Mechanical Properties (Typical at Room Temperature)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | ≈ 7.80 g/cm³ | | Melting Range | ≈ 1380 - 1445 °C | | Specific Heat Capacity (0-100°C) | ≈ 500 J/kg·K | | Thermal Conductivity (20°C) | ≈ 19 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | ≈ 13.7 x 10⁻⁶ /K | | Modulus of Elasticity (Tensile) | ≈ 200 GPa | | **Tensile Strength (Rm)** | **≥ 620 MPa** (ASTM A240) | | **Yield Strength (Rp0.2)** | **≥ 450 MPa** (ASTM A240) | | **Elongation (A in 50mm)** | **≥ 25 %** | | Hardness (Brinell) | ≤ 293 HBW | | Impact Toughness (Charpy V-notch) | Typically > 100 J at -40°C | | **PREN (Pitting Resistance Equivalent Number)** | **PREN = %Cr + 3.3(%Mo) + 16(%N) ≈ 33-36** | *The PREN value quantifies its excellent localized corrosion resistance.* --- **3. Product Forms & Applications** **Available Product Forms:** * Plate, Sheet, and Strip * Seamless and Welded Pipe & Tubing (Process, Mechanical, Heat Exchanger) * Bar, Rod, Wire, and Forgings * Flanges, Fittings, and Fasteners **Primary Applications:** * **Oil & Gas Industry:** Production and process piping, separators, heat exchangers, flowlines, and pressure vessels, especially in offshore and sour (H₂S) service applications (when compliant with NACE MR0175). * **Chemical & Petrochemical Processing:** Tanks, reactors, columns, and piping for handling chlorides, organic acids, and acidic brines. * **Pulp & Paper Industry:** Digester pre-heaters, bleach washer drums, and liquor handling systems. * **Marine & Offshore:** Seawater cooling systems, piping, pumps, and valves on ships and offshore platforms. * **Water & Wastewater Treatment:** High-pressure RO membranes, piping, and components in desalination plants. * **Chemical Tankers:** Cargo tanks and piping systems. * **Architecture & Construction (Heavy Duty):** Bridges, pressure vessels, and structural components in aggressive coastal environments. --- **4. International Standards & Approvals** UNS S31803 is universally recognized and specified across major international standards. The closely related S32205 is often specified interchangeably or for slightly higher guaranteed properties. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **S31803** (Also **S32205**) | S32205 has tighter composition (higher Mo, N min.) for better pitting resistance. | | **ASTM (USA)** | ASTM A240 (Plate/Sheet/Strip)
ASTM A790/A789 (Pipe & Tube)
ASTM A182 (Forgings & Fittings)
ASTM A276 (Bar) | The primary reference standards for procurement in North America and globally. | | **EN / EURONORM (Europe)** | **1.4462** (Common European material number for both S31803/S32205) | Widely used across European industries. | | | EN 10088-2: Sheet/Plate
EN 10216-5: Seamless pressure tubes
EN 10253-4: Butt-welding fittings | | | **NACE MR0175/ISO 15156** | **Compliant** | Approved for use in sour service (H₂S) oilfield environments within defined hardness and environmental limits. | | **Other Standards** | JIS G4304 / G4305 (Japan) - SUS 329J3L
GB/T 20878 (China) - 022Cr22Ni5Mo3N
AS 4677 (Australia) - 2205 | Local designations may vary slightly. | **Important Note:** While UNS S31803 and S32205 are often considered commercial equivalents, critical applications may specify S32205 for its guaranteed higher minimum alloy content. Always refer to the specific purchase order, material standard (e.g., ASTM A240), and the certified material test report (CMTR/MTR) for guaranteed properties. Proper fabrication, welding (using 2209-type consumables), and heat treatment are essential to preserve the microstructure and corrosion resistance. -:- For detailed product information, please contact sales. -: Carlson 2205 (UNS S31803) Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7271 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Carlson 2205 (UNS S31803) Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Carlson 2205 (UNS S31803) Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers Carlson 2205 (UNS S31803) Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -:

Packing of Carlson 2205 (UNS S31803) Duplex Stainless Steel Wire -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Wire drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3742 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition