ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Rod/Bar

ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Rod Product Information -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Rod Synonyms -:- For detailed product information, please contact sales. -:

ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel **Introduction:** ATI AL 2003™ is a **lean, low-nickel duplex stainless steel** designed by ATI to offer a superior, cost-effective alternative to standard austenitic grades like Type 304/304L and Type 316/316L. It achieves an optimal balance by providing **significantly higher strength and stress corrosion cracking (SCC) resistance** while minimizing the use of expensive alloying elements like nickel and molybdenum. Its low nickel content also results in more stable pricing. AL 2003™ is engineered for applications where the mechanical advantages of duplex stainless steel are desired, but the full corrosion resistance of standard or super duplex grades is not required. **Key Features:** * **High Strength & Weight Savings:** Delivers approximately **double the yield strength** of Type 304L and 316L stainless steels, enabling thinner gauges, reduced weight, and potential cost savings in structural and pressure applications. * **Excellent Stress Corrosion Cracking (SCC) Resistance:** Provides vastly superior resistance to chloride-induced SCC compared to 300-series austenitic steels, making it ideal for moderately corrosive environments. * **Cost-Effective & Price-Stable Alloy Design:** The "lean" chemistry, with lower nickel and molybdenum content, offers a more affordable initial cost and less price volatility than standard duplex grades. * **Good Fabricability:** Offers good weldability and formability using standard shop practices adapted for duplex stainless steels. --- **1. Chemical Composition (Typical Weight % - ATI Specification)** The composition is optimized for a stable ferrite-austenite microstructure with lean alloying. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 21.0 - 22.0 | Nickel (Ni) | 3.0 - 4.0 | | Molybdenum (Mo)| 0.10 - 0.30 | Nitrogen (N) | 0.08 - 0.16 | | Manganese (Mn) | 4.0 - 6.0 | Copper (Cu) | 0.50 - 1.00 | | Silicon (Si) | ≤ 0.75 | Carbon (C) | ≤ 0.030 | | Phosphorus (P) | ≤ 0.025 | Sulfur (S) | ≤ 0.005 | | **Iron (Fe)** | **Balance** | | | **Key Alloying Note:** The **high manganese (Mn) content** partially replaces nickel (Ni) to stabilize the austenite phase and maintain a balanced microstructure, which is central to its cost-saving strategy. **PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) ≈ **24 - 26** --- **2. Physical & Mechanical Properties (Typical at Room Temperature - Annealed Condition)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.7 g/cm³ | | Melting Range | ~1420 - 1460 °C | | Thermal Conductivity (20°C) | ~18 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | ~14.0 x 10⁻⁶ /K | | Modulus of Elasticity | 200 GPa | | **Tensile Strength (Rm)** | **≥ 690 MPa** | | **Yield Strength (Rp0.2)** | **≥ 450 MPa** | | **Elongation (A in 50mm)** | **≥ 25 %** | | Hardness (Rockwell B) | ~96 HRB | | **Impact Toughness (Charpy V-notch)** | **Typically > 100 J at -40°C** | --- **3. Product Forms & Applications** **Available Product Forms:** * Sheet and Strip * Plate * Bar and Wire * Welding Consumables **Target Applications:** AL 2003™ is targeted at replacing 304/304L and 316/316L in applications where higher strength or SCC resistance is the primary driver: * **Transportation:** Structural components, chassis parts, truck frames, and railcar bodies where weight savings and durability are key. * **Construction & Architecture:** Roofing, cladding, structural sections, rebar, and fasteners in atmospheric environments, particularly where de-icing salts are used. * **Water & Wastewater Treatment:** Tanks, basins, baffles, and structural supports in mild to moderately corrosive water environments. * **Material Handling & Containers:** Industrial containers, hoppers, and conveyor systems requiring higher wear resistance and strength. * **Food & Beverage Processing:** Equipment frames, supports, and certain non-critical process components. * **Heat Exchangers:** For cooling water services with moderate chloride levels where Type 304/316 may be prone to SCC. * **Pulp & Paper:** Certain non-corrosive structural components in pulp mills. --- **4. International Standards & Approvals** AL 2003™ is a proprietary grade developed by ATI. It is aligned with the concept of lean duplex stainless steels but has its own unique specification. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **Unified Numbering System (UNS)** | **S32003** (Common equivalent Lean Duplex grade) | AL 2003™ is ATI's proprietary product that generally conforms to the characteristics of UNS S32003. | | **ASTM (USA)** | **ASTM A240** (for Plate/Sheet/Strip) - Can be supplied to meet the requirements for UNS S32003. | The primary means of standardized procurement is under the UNS S32003 designation in relevant ASTM standards. | | **EN / EURONORM (Europe)** | Potentially aligns with lean duplex grade **1.4362**. | Not a direct, universally listed EN grade; often specified by agreement. | | **Other Approvals** | May be evaluated and approved for specific projects or by end-users based on its technical datasheet and performance testing. | Its adoption is often driven by its specific value proposition rather than universal standard listing. | | **Key Procurement Specification** | **ATI AL 2003™ Technical Datasheet & ATI's internal material specifications.** | For guaranteed proprietary properties, the ATI datasheet is the controlling document. | **Important Technical & Procurement Note:** ATI AL 2003™ is a **proprietary lean duplex alloy**. While it shares similarities with standard lean duplex grades like UNS S32003, its exact properties are defined by ATI's manufacturing specifications. For procurement, it is effective to specify "ATI AL 2003™ meeting the requirements of ASTM A240 UNS S32003." Fabrication requires procedures suitable for duplex stainless steels. Welding should be performed with **lean duplex or over-matching filler metals** (e.g., 2209 type) under controlled heat input. The primary advantage lies in its **high strength-to-cost ratio** and **SCC resistance** in specific environments, but a thorough corrosion assessment against the service conditions is essential before selection. -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7278 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. -: ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Rod -:- For detailed product information, please contact sales. -: Chemical Identifiers ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Rod -:- For detailed product information, please contact sales. -:

Packing of ATI Allegheny Ludlum AL 2003™ Duplex Stainless Steel Rod -:- 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 Rod 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 3749 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