INCONEL 622 Nickel Superalloy (UNS N06022)，1

### **Product Introduction: INCONEL® 622 (UNS N06022)** **INCONEL® 622** is a nickel-chromium-molybdenum-tungsten alloy specifically designed to provide exceptional corrosion resistance in a wide range of severe chemical environments. This advanced superalloy offers superior performance in both oxidizing and reducing media, with particular effectiveness against pitting, crevice corrosion, and stress corrosion cracking. The alloy's optimized composition provides enhanced resistance to mixed acid and chemical environments where other materials might fail. The balanced combination of chromium, molybdenum, and tungsten creates a highly stable passive film that protects against various forms of localized corrosion, making it particularly suitable for the most demanding chemical processing applications. --- ### **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 | | **Vanadium (V)** | 0.35 max | | **Carbon (C)** | 0.015 max | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.08 max | | **Phosphorus (P)** | 0.025 max | | **Sulfur (S)** | 0.02 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.69 g/cm³ | | **Melting Point** | 1350-1390 °C | | **Thermal Conductivity** | 10.5 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.35 μΩ·m | | **Modulus of Elasticity** | 207 GPa | | **Coefficient of Thermal Expansion** | 11.8 μm/m·°C (20-100°C) | | **Specific Heat Capacity** | 425 J/kg·K | | **Magnetic Permeability** | <1.001 | --- ### **Mechanical Properties** **Room Temperature Properties (Annealed):** - **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 - **Excellent creep strength up to 400°C** - **Good thermal stability** --- ### **Key Characteristics & Advantages** 1. **Exceptional Corrosion Resistance** - Outstanding resistance to sulfuric, hydrochloric, and phosphoric acids - Superior performance in mixed acid environments - Excellent resistance to pitting and crevice corrosion 2. **Versatile Environmental Performance** - Handles both oxidizing and reducing conditions - Excellent resistance to chloride-induced stress corrosion cracking - Good performance in acidic salt solutions 3. **Enhanced Alloy Composition** - Optimized chromium content for oxidizing environments - High molybdenum and tungsten for reducing conditions - Low carbon and silicon for improved weldability 4. **Excellent Fabricability** - Good weldability using conventional methods - Suitable for hot and cold working - 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 and scrubbers **Pollution Control:** - Flue gas desulfurization systems - Scrubbers and absorbers - Waste water treatment equipment - Incinerator components **Pharmaceutical Industry:** - Reaction vessels - Processing equipment - Piping and transfer systems - Purification systems **Oil and Gas Industry:** - Downhole components - Production tubing - Process equipment in refineries - Sour service applications --- ### **International Standards** | Standard Type | Standard Number | Product Form | |---------------|-----------------|--------------| | **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 | | **NACE** | MR-01-75 | Sour Service | | **ISO** | 15156-3 | Corrosion-resistant alloys | --- ### **Summary** **INCONEL® 622 (UNS N06022)** represents a significant advancement in nickel-based corrosion-resistant alloys, offering superior performance in some of the most aggressive chemical environments. Its carefully balanced composition provides exceptional resistance to a wide spectrum of corrosive media, including strong acids, chlorides, and other harsh chemicals. The alloy's enhanced resistance to localized corrosion, combined with excellent fabricability and weldability, makes it an ideal choice for critical components in chemical processing, pollution control, pharmaceutical, and energy industries. Certification to major international standards including ASTM, ASME, and NACE 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.

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 3330 gallon liquid totes Special package is available on request.