Alloy 22，Hastelloy C-22 Pipe，UNS N06022,E FORU

British Specs:，American Specs:，German Specs:WS 2.4602

### **Product Introduction: Alloy 22 (Hastelloy® C-22) Pipe / UNS N06022** **Superior Corrosion-Resistant Conveyance for the Most Aggressive Media** **Hastelloy® C-22 Pipe** (UNS N06022) represents the pinnacle of corrosion-resistant piping technology. Engineered for exceptional performance in both oxidizing and reducing environments, this nickel-chromium-molybdenum-tungsten alloy pipe is the definitive solution for conveying the most aggressive chemical media, including hot contaminated acids, chlorides, and solvent streams. Its unparalleled resistance to pitting, crevice corrosion, and stress corrosion cracking ensures maximum system integrity, safety, and longevity in critical applications across the chemical processing, pharmaceutical, and pollution control industries. Available in both seamless and welded forms, our C-22 pipe is manufactured to the highest international standards, guaranteeing consistent wall thickness, superior internal surface finish, and reliable performance under extreme conditions. --- #### **1. Chemical Composition (Weight %)** The precise, balanced composition is the foundation of C-22's universal corrosion resistance. | 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)** | 2.0 max | | **Vanadium (V)** | 0.35 max | | **Silicon (Si)** | 0.08 max | | **Manganese (Mn)** | 0.50 max | | **Carbon (C)** | 0.015 max | | **Phosphorus (P)** | 0.02 max | | **Sulfur (S)** | 0.02 max | * **Corrosion Resistance Synergy:** **Chromium** provides resistance to oxidizing agents (e.g., nitric acid, Fe³⁺, Cu²⁺), while **Molybdenum** and **Tungsten** impart protection against reducing agents (e.g., hydrochloric acid, sulfuric acid). The very low **Carbon** content prevents sensitization and subsequent intergranular attack during welding. --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 0.315 lb/in³ (8.69 g/cm³) | | **Melting Range** | 1350 - 1380°C (2460 - 2520°F) | | **Specific Heat** | 0.095 Btu/lb-°F (398 J/kg-°K) at 70°F (21°C) | | **Thermal Conductivity** | 6.5 Btu-ft/hr-ft²-°F (11.2 W/m·K) at 70°F (21°C) | | **Mean Coefficient of Thermal Expansion** | 7.8 x 10⁻⁶ per °F (14.0 x 10⁻⁶ per °K) from 70-200°F | | **Modulus of Elasticity (Tension)** | 29.5 x 10⁶ psi (203 GPa) | --- #### **3. Mechanical Properties (Typical for Annealed Condition)** Hastelloy C-22 pipe is supplied in a solution-annealed condition to ensure optimal corrosion resistance and ductility for fabrication. | Property | Typical Value at Room Temperature | | :--- | :--- | | **Tensile Strength** | 110 ksi (758 MPa) min | | **Yield Strength (0.2% Offset)** | 52 ksi (358 MPa) min | | **Elongation** | 65% min | | **Hardness** | Rb 90 (HRB 90) max | --- #### **4. Corrosion Resistance & Product Applications** **Unmatched Corrosion Resistance:** * **Oxidizing Media:** Excellent resistance to nitric acid, aqua regia, and other strong oxidizers. * **Reducing Media:** Superior performance in hydrochloric and sulfuric acids, particularly where chlorides are present. * **Localized Attack:** Outstanding resistance to pitting and crevice corrosion in chloride-bearing solutions, even under stagnant conditions. * **Mixed Chemistry:** Handles complex and changing environments, such as oxidizing salts in reducing acids, with remarkable stability. * **Stress Corrosion Cracking (SCC):** Highly resistant to chloride-induced SCC. **Primary Industry Applications:** * **Chemical Processing Industry (CPI):** * **Reactor feed and effluent lines** * **Heat exchanger tubes** and piping * **Interconnecting piping** for reactors, columns, and vessels handling aggressive acids and catalysts. * **Solvent recovery** and acid concentration systems. * **Pollution Control & Flue Gas Desulfurization (FGD):** * **Scrubber inlet and outlet ducting** * **Re-circulation slurry piping** * **Bypass dampers and stack liners** where condensation of acidic chlorides and fluorides occurs. * **Pharmaceutical & Fine Chemical:** * **Process piping** for highly corrosive intermediates and reagents. * **High-Purity (HP) tubing** for stringent clean-in-place (CIP) and steam-in-place (SIP) services. * **Waste Incineration & Processing:** * Piping for handling concentrated brines, leachates, and chemical waste streams. * Off-gas and effluent lines in nuclear waste treatment facilities. * **Pulp & Paper Industry:** * Bleach plant piping and chlorine dioxide handling systems. --- #### **5. International Standards** Our Hastelloy C-22 Pipe conforms to the following global standards, ensuring quality and interoperability. **Primary Material & Product Standards:** * **ASTM B622:** Standard Specification for Seamless Nickel and Nickel Alloy Pipe. * **ASTM B619/B626:** Standard Specification for Welded Nickel and Nickel Alloy Pipe. * **ASME SB-622, SB-619/SB-626:** ASME Code qualification for pressure vessel and piping applications. * **UNS:** **UNS N06022** * **EURONORM:** **2.4602** * **DIN:** DIN 17744 - NiCr21Mo14W **Common Specifications:** * **Types:** Seamless (SMLS) and Welded (Welded & Cold-Worked). * **Schedules:** SCH 5S, 10S, 40S, 80S, and XXS. * **Sizes:** From 1/8" NPS to 24" NPS and larger. * **Condition:** Solution Annealed and Pickled/Passivated. --- #### **Why Choose Our Hastelloy C-22 Pipe?** * **Proven Reliability in Critical Service:** Offers the widest corrosion resistance spectrum, minimizing the risk of unexpected failure and downtime in complex chemical environments. * **Superior Weldability & Fabrication:** Excellent welding characteristics allow for the construction of complex, leak-free piping systems. We can provide matching filler metals and welding procedure specifications. * **Rigorous Quality Assurance:** Every length of pipe is backed by a certified Mill Test Report (MTR/CMTR) providing full traceability to the melt heat and verifying compliance with chemical and mechanical requirements per ASTM/ASME standards. * **Optimal Product Forms:** We supply both seamless pipe for high-pressure applications and high-quality welded pipe for larger diameters, ensuring a cost-effective solution for every project need. * **Technical Expertise:** Our team provides comprehensive support, from material selection and specification review to fabrication guidance and post-weld heat treatment recommendations. **For detailed sizing, pricing, and to discuss your specific application requirements, contact our technical sales team today. Let us be your trusted partner for critical corrosion-resistant piping systems.** *Hastelloy® is a registered trademark of Haynes International Inc.*

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 2732 gallon liquid totes Special package is available on request.