INCONEL alloy 22 Austenitic Alloy,UNS N06022; ，1

### **Product Introduction: INCONEL® Alloy 22 (UNS N06022)** **INCONEL® Alloy 22** is a nickel-chromium-molybdenum-tungsten austenitic alloy designed to deliver exceptional corrosion resistance in a wide range of severe environments. This versatile superalloy exhibits outstanding performance in both oxidizing and reducing media, with particular effectiveness against pitting, crevice corrosion, and stress corrosion cracking. The alloy's balanced composition provides reliable protection in diverse corrosive conditions, including acidic, alkaline, and chloride-containing environments. The alloy's optimized chemistry enables it to handle some of the most aggressive chemical processes while maintaining excellent fabricability and weldability characteristics, making it suitable for critical applications across multiple industries. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 20.0 - 22.5 | | **Molybdenum (Mo)** | 12.5 - 14.5 | | **Tungsten (W)** | 2.5 - 3.5 | | **Iron (Fe)** | 2.0 - 6.0 | | **Cobalt (Co)** | 2.5 max | | **Manganese (Mn)** | 0.50 max | | **Vanadium (V)** | 0.35 max | | **Silicon (Si)** | 0.08 max | | **Carbon (C)** | 0.015 max | | **Phosphorus (P)** | 0.02 max | | **Sulfur (S)** | 0.02 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.69 g/cm³ | | **Melting Point** | 1357 - 1399 °C | | **Thermal Conductivity** | 10.5 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.22 μΩ·m | | **Modulus of Elasticity** | 207 GPa | | **Coefficient of Thermal Expansion** | 11.8 μm/m·°C (20-100°C) | | **Specific Heat Capacity** | 423 J/kg·K | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties** **Annealed Condition:** - **Tensile Strength:** 690 MPa (min) - **Yield Strength (0.2% Offset):** 310 MPa (min) - **Elongation:** 45% (min) - **Hardness:** 95 HRB (max) **Elevated Temperature Performance:** - **Tensile Strength at 540°C:** 550 MPa - **Yield Strength at 540°C:** 260 MPa - **Good creep strength up to 400°C** - **Excellent thermal stability** --- ### **Key Characteristics & Advantages** 1. **Exceptional Corrosion Resistance** - Outstanding resistance to pitting and crevice corrosion - Excellent performance in oxidizing and reducing acids - Superior resistance to chloride-induced stress corrosion cracking 2. **Versatile Environmental Performance** - Handles broad pH range from acidic to alkaline conditions - Excellent resistance to mixed chemical environments - Good performance in oxidizing chloride solutions 3. **Enhanced Alloy Composition** - Optimized chromium for oxidizing environments - High molybdenum and tungsten for reducing conditions - Ultra-low carbon and silicon for improved weldability 4. **Excellent Fabricability** - Good weldability using conventional methods - Suitable for hot and cold working operations - Maintains corrosion resistance in as-welded condition --- ### **Product Applications** **Chemical Processing Industry:** - Reactors and pressure vessels - Heat exchangers and condensers - Piping systems and pumps - Distillation columns **Pollution Control:** - Flue gas desulfurization systems - Scrubbers and absorbers - Waste water treatment equipment - Chemical waste processing **Pharmaceutical Industry:** - Reaction vessels and reactors - Process equipment and piping - Purification systems - High-purity chemical handling **Pulp and Paper Industry:** - Bleach plant equipment - Chemical recovery systems - Digester components - Process piping --- ### **International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **UNS** | N06022 | Unified Numbering System | | **ASTM** | B575 | Plate, Sheet, and Strip | | **ASTM** | B574 | Rod and Bar | | **ASTM** | B619/B622 | Welded and Seamless Pipe | | **ASME** | SB-575, SB-574 | Code Cases | | **DIN** | 2.4602 | Material Number | --- ### **Summary** **INCONEL® Alloy 22 (UNS N06022)** represents a premier nickel-chromium-molybdenum-tungsten austenitic alloy that offers superior corrosion resistance in the most challenging chemical environments. Its carefully balanced composition provides exceptional protection against a wide spectrum of corrosive media, including strong acids, chlorides, and mixed chemical solutions. The alloy's outstanding resistance to localized corrosion, combined with excellent fabricability and weldability, makes it an ideal choice for critical equipment in chemical processing, pollution control, pharmaceutical, and pulp and paper industries. Certification to major international standards including ASTM and ASME specifications ensures consistent quality and reliability, providing engineers with a robust material solution for demanding applications where corrosion resistance and long-term performance are critical requirements. The alloy's versatility and proven performance establish it as a benchmark material for handling aggressive industrial environments.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel 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 3351 gallon liquid totes Special package is available on request.