Outokumpu 4501 Duplex Stainless Steel Tube,Pipe

Outokumpu 4501 Duplex Stainless Steel Tube Product Information -:- For detailed product information, please contact sales. -: Outokumpu 4501 Duplex Stainless Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

Outokumpu 4501 Duplex Stainless Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Name: Outokumpu 4501 (LDX 2404®) Duplex Stainless Steel (EN 1.4501 / UNS S82441)** ## **Introduction** Outokumpu 4501, commercially known as **LDX 2404®**, is an advanced **lean duplex stainless steel** engineered to provide a superior performance-to-cost ratio in a wide range of demanding applications. It offers a **high-chromium, low-nickel** alloy design that delivers **exceptional strength, excellent stress corrosion cracking (SCC) resistance, and improved pitting corrosion resistance** compared to standard lean duplex grades. Positioned between standard austenitic grades like 316L and classic duplex 2205, Outokumpu 4501 is the optimal choice for applications requiring enhanced durability and safety margins without the full alloy cost of standard duplex. ## **Key Features** * **High Strength & Weight Savings:** Yield strength (~530 MPa min.) is **significantly higher than both 316L and standard lean duplex grades**, approaching the strength level of 2205, enabling substantial weight and material savings. * **Excellent Corrosion Resistance:** Combines very good resistance to chloride stress corrosion cracking (SCC) with a Pitting Resistance Equivalent Number (PREN) of ~32-34, offering better localized corrosion resistance than 316L and many lean duplex alloys. * **Cost-Effective & Sustainable:** The lower nickel and molybdenum content compared to 2205 provides a more stable and economical alloy cost, along with a lower environmental footprint. * **Good Weldability and Fabricability:** Can be welded and formed using standard practices for duplex stainless steels, with good toughness. --- ## **1. Chemical Composition (Typical Weight %)** The composition is optimized with higher chromium and controlled nitrogen for enhanced performance. | Element | Content (%) | Element | Content (%) | | :------------- | :------------ | :------------- | :---------- | | Chromium (Cr) | 23.5 - 25.5 | Nickel (Ni) | 3.0 - 4.5 | | Molybdenum (Mo)| 1.0 - 2.0 | **Nitrogen (N)**| **0.20 - 0.30** | | Manganese (Mn) | ≤ 2.0 | Copper (Cu) | 0.50 - 1.50 | | Silicon (Si) | ≤ 0.8 | Carbon (C) | ≤ 0.030 | | Phosphorus (P) | ≤ 0.035 | Sulfur (S) | ≤ 0.015 | | **Iron (Fe)** | **Balance** | | | **Key Alloying Strategy:** Higher **Chromium (Cr)** and **Nitrogen (N)** content than typical lean duplex grades, with moderate **Molybdenum (Mo)**. This creates a unique "high-strength, lean alloy" profile. **PREN Calculation:** PREN = %Cr + 3.3(%Mo) + 16(%N) ≈ **32 - 34** --- ## **2. Physical & Mechanical Properties (Typical - Annealed Condition)** | Property | Value / Range | | :-------------------------------------------- | :-------------------------------- | | Density | 7.8 g/cm³ | | Thermal Conductivity (20°C) | ~17 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | ~13.0 x 10⁻⁶ /K | | Modulus of Elasticity | 200 GPa | | **Tensile Strength (Rm)** | **700 - 900 MPa** | | **Yield Strength (Rp0.2)** | **≥ 530 MPa** | | **Elongation (A in 50mm)** | **≥ 20 %** | | Hardness (Brinell) | 260 - 320 HBW | | **Impact Toughness (Charpy V-notch)** | **≥ 60 J at -20°C** | --- ## **3. Product Forms & Applications** **Available Product Forms:** * Plate and Sheet * Coil and Strip * Bar and Wire * Welded Pipe and Tube **Target Applications (Bridging 316L and 2205):** Outokumpu 4501 is ideal where 316L is at its limits or where the cost of 2205 is prohibitive: * **Construction & Infrastructure:** Bridges, structural components, reinforcement bars (rebar), and façades in highly corrosive coastal or de-icing salt environments. * **Water & Wastewater:** Pressure pipes, storage tanks, and treatment plant components exposed to chlorides and aggressive waters. * **Chemical & Process Industry:** Tanks, vessels, and piping for moderately aggressive chemicals, acids, and chlorides where 316L may suffer from pitting or SCC. * **Pulp & Paper:** Equipment in bleach plants and chemical recovery sections. * **Transportation:** High-strength components for railcars, shipbuilding, and heavy vehicles. * **Energy:** Structural parts and piping in power generation and flue gas cleaning systems. * **Oil & Gas (Midstream):** Pipework and tanks for produced water or less aggressive service. --- ## **4. International Standards & Approvals** Outokumpu 4501 / LDX 2404® is standardized under modern duplex classifications. | Standard Type | Standard Number & Designation | Notes | | :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | **EN / EURONORM (Europe)** | **1.4501** | The primary European material number for this grade. | | | EN 10088-2: Sheet/Plate/Strip
EN 10088-3: Bars | Covered in key European product standards. | | **Unified Numbering System (UNS)** | **S82441** (Proposed/Accepted) | The UNS designation aligning with EN 1.4501. | | **ASTM (USA)** | Can be supplied to meet key mechanical and corrosion properties under customer specification. | May not have a direct, common ASTM grade equivalent like 2205. Often procured to EN 1.4501 or Outokumpu proprietary specification. | | **Key Procurement Specification** | **Outokumpu LDX 2404® / 4501 Technical Datasheet** and/or **EN 1.4501**. | For guaranteed properties, the Outokumpu datasheet or EN standard should be referenced. | --- ## **Important Technical & Procurement Note** Outokumpu 4501 / LDX 2404® is a **proprietary, high-performance lean duplex grade**. * **Procurement:** Specify **"Outokumpu 4501 (LDX 2404®) to EN 1.4501"** to ensure receipt of the correct alloy. The certified chemical analysis should reflect the high Cr (≥23.5%) and N (≥0.20%) content. * **Fabrication:** Welding requires appropriate filler metals, typically a lean duplex or a standard duplex grade like 2209, under controlled procedures. Forming forces are higher than for austenitic steels. * **Selection Rationale:** It is an **excellent upgrade from 316L** when higher strength, better SCC, and improved pitting resistance are needed, and a **cost-effective alternative to 2205** when the ultimate pitting resistance of 2205 is not strictly required. * **Certification:** Always require a **material test certificate (MTC/CMTR)** confirming compliance with EN 1.4501 or the Outokumpu specification, including PREN calculation. -:- For detailed product information, please contact sales. -: Outokumpu 4501 Duplex Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7289 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. -: Outokumpu 4501 Duplex Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Outokumpu 4501 Duplex Stainless Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Outokumpu 4501 Duplex Stainless Steel Tube -:- For detailed product information, please contact sales. -:

Packing of Outokumpu 4501 Duplex Stainless Steel Tube -:- 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 Tube 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 3760 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