Outokumpu 4565 High Performance Austenitic Stainless Steel Tube,Pipe

Outokumpu 4565 High Performance Austenitic Stainless Steel Tube Product Information -:- For detailed product information, please contact sales. -: Outokumpu 4565 High Performance Austenitic Stainless Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

Outokumpu 4565 High Performance Austenitic Stainless Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Name:** Outokumpu 4565 (UNS S34565 / 1.4565 / Nitrofer® 4565 Mod.) **Classification:** High-Strength, High-Nitrogen Super Austenitic Stainless Steel --- ### **1. Overview** Outokumpu 4565 is a **high-performance, nitrogen-alloyed super austenitic stainless steel** engineered to deliver an exceptional combination of **extremely high mechanical strength** and **outstanding corrosion resistance**, particularly against chloride-induced pitting and crevice corrosion. It represents a significant advancement in material science, where high nitrogen content (≥0.45%) acts as a potent solid-solution strengthener, elevating its yield strength to levels comparable to duplex steels, while maintaining the excellent toughness and fabricability of a fully austenitic structure. With a **Pitting Resistance Equivalent Number (PREN >50)**, it is designed for the most demanding structural and pressure-containing applications in aggressive environments where both strength and corrosion resistance are critical. ### **2. Chemical Composition (Weight %, typical)** The composition is precisely balanced to achieve ultra-high strength through nitrogen saturation while maintaining austenite stability and corrosion resistance. | Element | Minimum (%) | Typical (%) | Maximum (%) | Notes | |---------|------------|------------|------------|-------| | **Carbon (C)** | - | 0.02 | 0.03 | Very low to prevent sensitization. | | **Chromium (Cr)** | 23.0 | 24.0 | 25.0 | Provides the fundamental passive layer for corrosion resistance. | | **Nickel (Ni)** | 16.0 | 17.0 | 18.0 | Stabilizes the austenitic matrix and provides resistance to stress corrosion cracking. | | **Molybdenum (Mo)** | 4.0 | 4.5 | 5.0 | Essential for resistance to pitting and crevice corrosion in chloride environments. | | **Nitrogen (N)** | 0.40 | 0.45 | 0.50 | **The key strengthening element.** This exceptionally high nitrogen content provides massive solid-solution strengthening, dramatically increasing yield and tensile strength without compromising toughness. It also significantly boosts pitting resistance. | | **Manganese (Mn)** | 2.0 | 4.0 | 6.0 | High manganese is essential to achieve and maintain such high nitrogen solubility in the austenite lattice during melting and processing. | | **Copper (Cu)** | - | 0.50 | 1.00 | May be added to enhance resistance to sulfuric acid. | | **Silicon (Si)** | - | 0.50 | 0.70 | - | | **Phosphorus (P)** | - | 0.025 | 0.035 | - | | **Sulfur (S)** | - | 0.005 | 0.010 | Very low for optimal corrosion and fabrication properties. | | **Iron (Fe)** | Balance | Balance | Balance | - | **Key Metric:** **PREN (Cr + 3.3Mo + 30N) ≥ 50**, indicating exceptional resistance to localized corrosion. Note the higher coefficient for Nitrogen (30) often used for such high-N steels. ### **3. Physical & Mechanical Properties** *Properties are typical for solution annealed material (min 1170°C water quench).* **Mechanical Properties:** * **Tensile Strength (Rm):** 750 - 1000 MPa (109 - 145 ksi) * **Yield Strength (Rp0.2):** 450 MPa min (65 ksi min) *[Remarkably high for an austenitic stainless steel]* * **Elongation (A):** 30% min * **Hardness (typical):** 95 - 115 HRB (200 - 250 HV) * **Modulus of Elasticity:** 200 GPa (29 x 10⁶ psi) * **Fatigue Strength:** Excellent, benefiting from high strength and good toughness. * **Charpy V-Notch Impact:** Maintains good toughness at low temperatures. **Physical Properties:** * **Density:** 7.8 g/cm³ (0.282 lb/in³) * **Melting Range:** ~1350 - 1400 °C (2460 - 2550 °F) * **Thermal Conductivity:** ~15 W/m·K (at 20°C) * **Coefficient of Thermal Expansion:** ~16.5 x 10⁻⁶ /K (20-100°C) * **Magnetic Permeability:** < 1.05 (fully austenitic and non-magnetic) ### **4. Key Characteristics** * **Ultra-High Strength:** The primary distinguishing feature. Yield strength is more than double that of standard 316L and significantly higher than other super austenitics like 254 SMO®, approaching duplex steel levels. * **Outstanding Corrosion Resistance:** Exceptionally high PREN provides best-in-class resistance to pitting, crevice corrosion, and stress corrosion cracking in severe chloride environments (seawater, chlorinated process streams). * **Excellent Toughness & Ductility:** Maintains the good elongation and impact toughness characteristic of austenitic steels, unlike duplex steels which can be more brittle at low temperatures. * **Good Wear & Galling Resistance:** The high hardness and strength contribute to improved resistance to mechanical wear. * **Challenging Fabrication:** The high strength and work hardening rate make cold forming and machining more difficult than standard grades. Welding requires specific procedures to avoid nitrogen loss and secondary phase precipitation. ### **5. Product Applications** Outokumpu 4565 is specified for highly demanding applications where its unique property combination is critical: * **High-Pressure, Corrosive Service:** Thinner-walled pressure vessels, heat exchanger shells, and piping systems for offshore oil & gas (especially subsea), chemical processing, and power plants, enabling significant weight savings. * **Marine & Offshore Engineering:** High-strength fasteners, bolts, propeller shafts, subsea components, and structural parts on offshore platforms exposed to seawater. * **Chemical Process Industries (CPI):** Agitators, mixer shafts, reactor internals, and pump components exposed to aggressive chlorides and requiring high mechanical strength. * **Pulp & Paper Industry:** Equipment in bleaching plants requiring high strength and chloride resistance. * **Aerospace & Defense:** High-strength, non-magnetic components. * **Desalination:** High-pressure reverse osmosis membrane housings and other structural components. ### **6. International Standards & Specifications** | Region/System | Standard & Designation | Form/Product Standard | |---------------|----------------------|----------------------| | **UNS** | **UNS S34565** | Unified Numbering System | | **ASTM / ASME** | **ASTM A276 / A479** | Bar and Wire | | **European (EN)** | **1.4565** (X2CrNiMnMoN25-17-4-5) | EN 10088-3 (Bars, rods, wire) | | **Germany (DIN)** | **DIN 1.4565** | - | | **Common Names** | **Nitrofer® 4565 mod., 25-17-4-5** | - | **Note:** This is a relatively specialized grade. Full product form specifications (e.g., for plate, pipe) are often covered by manufacturer (Outokumpu) standards or material-specific agreements rather than generic ASTM/EN standards. ### **7. Available Forms & Processing** * **Standard Forms:** Primarily available as **bar, rod, wire, forgings, and occasionally plate**. Availability in tubular products may be limited. * **Condition:** Supplied in the **solution annealed and quenched** condition. * **Fabrication:** * **Welding:** **Requires expert procedure.** Use low heat input (TIG/GTAW preferred), high-purity shielding gas (Ar + N₂ mixture possible), and over-alloyed filler metals (e.g., Ni-base alloys like ERNiCrMo-3/4 or specially developed high-N fillers) to compensate for potential nitrogen loss and microstructural changes in the HAZ. * **Machining:** Demanding due to high strength and work hardening. Requires rigid setups, sharp tools with positive rake angles, lower speeds, and higher feeds with ample cooling. * **Forming:** Cold forming is possible but requires significantly more force; hot forming is often preferred for complex shapes. ### **8. Why Choose Outokumpu 4565?** Outokumpu offers this advanced material with: * **Metallurgical Expertise:** Mastery in the production of high-nitrogen steels, ensuring consistent and homogeneous quality. * **Property Optimization:** Guarantees the optimal balance of ultra-high strength and top-tier corrosion resistance. * **Technical Partnership:** Provides critical support for successful application engineering, welding procedure development, and fabrication challenges. * **Lifecycle Value:** Enables innovative, lightweight designs with long service life in extreme conditions, offering a cost-effective alternative to nickel alloys or duplex steels in specific applications. --- **Disclaimer:** This datasheet provides general information. Outokumpu 4565 is a **high-performance, specialized material**. Its fabrication, especially welding, requires advanced knowledge and qualified procedures. Corrosion performance in specific environments should be verified through testing. The high thermal expansion coefficient must be accounted for in design. Always consult Outokumpu's latest technical data sheets and engage with their application engineering specialists for project-specific guidance. "Nitrofer" is a registered trademark of VDM Metals, an Outokumpu group company. -:- For detailed product information, please contact sales. -: Outokumpu 4565 High Performance Austenitic Stainless Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7401 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 4565 High Performance Austenitic Stainless Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Outokumpu 4565 High Performance Austenitic Stainless Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Outokumpu 4565 High Performance Austenitic Stainless Steel Tube -:- For detailed product information, please contact sales. -:

Packing of Outokumpu 4565 High Performance Austenitic 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 3872 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