Nickelvac C 22 UNS N06022 Nickel Superalloy,ASTM B 564, B 574, B 575, B 619, B 622, B 626.,E FORU

### **Product Introduction: Nickelvac® C-22 (UNS N06022) Nickel-Chromium-Molybdenum-Tungsten Superalloy** **Nickelvac C-22 (UNS N06022)** is a versatile nickel-chromium-molybdenum-tungsten superalloy renowned for its outstanding corrosion resistance in a wide range of aggressive environments. This solid-solution strengthened alloy demonstrates exceptional performance in both oxidizing and reducing media, with superior resistance to pitting, crevice corrosion, and stress corrosion cracking. The carefully balanced chemical composition provides optimal stability in mixed acid and salt environments, making it one of the most reliable materials for severe corrosive applications. The alloy's excellent fabricability and weldability allow for the construction of complex process equipment, while its ability to withstand both chemical corrosion and thermal stress has established it as a premier choice for demanding chemical processing, pollution control, and industrial applications. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of Nickelvac C-22 per ASTM standards is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | Balance | **Tungsten (W)** | 2.50 - 3.50 | | **Chromium (Cr)** | 20.00 - 22.50 | **Iron (Fe)** | 2.00 - 6.00 | | **Molybdenum (Mo)** | 12.50 - 14.50 | **Cobalt (Co)** | 2.50 max | | **Vanadium (V)** | 0.35 max | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.08 max | **Carbon (C)** | 0.010 max | | **Phosphorus (P)** | 0.02 max | **Sulfur (S)** | 0.02 max | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.69 g/cm³ | 0.314 lb/in³ | | **Melting Range** | 1399 °C | 2550 °F | | **Thermal Conductivity** | 10.2 W/m·K | 70.7 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 11.3 μm/m·°C | 6.3 μin/in·°F | | **Modulus of Elasticity** | 206 GPa | 29.9 x 10⁶ psi | | **Specific Heat** | 427 J/kg·K | 0.102 Btu/lb·°F | **Mechanical Properties (Typical Annealed Condition):** | Property | Value | |----------|-----------------| | **Tensile Strength** | 690 MPa | 100 ksi | | **Yield Strength (0.2% Offset)** | 310 MPa | 45 ksi | | **Elongation** | 45% | | **Hardness (Rockwell B)** | 90 HRB | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Exceptional Corrosion Resistance**: Outstanding performance in both oxidizing and reducing environments - **Superior Localized Corrosion Resistance**: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking - **Broad Chemical Compatibility**: Effective in sulfuric acid, hydrochloric acid, formic acid, and acetic acid environments - **Oxidizing Media Stability**: Maintains corrosion resistance in oxidizing chemicals including ferric and cupric chlorides - **Excellent Fabricability**: Good weldability and formability using standard techniques - **Thermal Stability**: Maintains mechanical properties at elevated temperatures **Product Applications:** Nickelvac C-22 serves critical functions across multiple industries: - **Chemical Processing Industry**: - Reactors and pressure vessels for aggressive chemical production - Heat exchangers and condensers in corrosive service - Piping systems handling mixed acids and chlorides - Distillation columns and absorption towers - **Pollution Control Systems**: - Flue gas desulfurization (FGD) system components - Scrubbers and gas cleaning equipment - Waste incineration systems - Chemical waste treatment equipment - **Pharmaceutical Industry**: - Reactor vessels for active pharmaceutical ingredient production - High-purity fluid handling systems - Process equipment requiring cleanability and corrosion resistance - **Pulp and Paper Industry**: - Digester components - Bleach plant equipment - Chemical recovery systems - **Industrial and Marine Applications**: - Seawater handling components - Offshore oil and gas equipment - Industrial heating systems --- #### **4. International Standards & Specifications** Nickelvac C-22 is comprehensively covered by ASTM standards: **ASTM Standards:** - **ASTM B564**: Forgings - **ASTM B574**: Low-Carbon Nickel-Molybdenum-Chromium Alloy Rod - **ASTM B575**: Plate, Sheet, and Strip - **ASTM B619**: Welded Pipe - **ASTM B622**: Seamless Pipe and Tube - **ASTM B626**: Welded Tube **Other International Standards:** - **UNS**: N06022 - **ASME**: SB-564, SB-574, SB-575, SB-619, SB-622, SB-626 - **EN**: 2.4602 (NiCr21Mo14W) - **DIN**: 2.4602 - **ISO**: 15156-3 / NACE MR0175 compliant --- #### **Summary of Key Advantages** - **Versatile Corrosion Resistance**: Excellent performance across a broad spectrum of corrosive media - **Superior Localized Corrosion Resistance**: Outstanding resistance to pitting and crevice corrosion - **Optimized Chemical Composition**: Balanced chemistry for maximum corrosion resistance and fabricability - **Excellent Weldability**: Can be welded without post-weld heat treatment for most applications - **Comprehensive Standardization**: Covered by complete suite of ASTM product specifications - **Proven Reliability**: Extensive successful service history in severe corrosive environments **Technical Note**: Nickelvac C-22 exhibits excellent weldability using matching filler metals or overalloyed options. The alloy's low carbon content minimizes sensitization during welding, making it suitable for as-welded construction in most applications. The material demonstrates good cold and hot working characteristics, with intermediate annealing recommended for severe cold forming operations. Proper cleaning after fabrication is essential to maintain optimum corrosion resistance performance.

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 3153 gallon liquid totes Special package is available on request.