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

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

### **Product Introduction: Alloy 22 (Hastelloy® C-22) Tube / UNS N06022** **Precision-Engineered Tubing for Critical Corrosive Service** **Hastelloy® C-22 Tube** (UNS N06022) represents the highest standard in corrosion-resistant tubing technology. This nickel-chromium-molybdenum-tungsten alloy tubing offers exceptional performance in both oxidizing and reducing environments, making it the ideal choice for applications requiring reliable containment and transport of aggressive media. With outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, C-22 tubes ensure long-term reliability in critical heat transfer, instrumentation, and process applications across chemical processing, pharmaceutical, and energy industries. Available in seamless and welded configurations, our C-22 tubes are manufactured to precise dimensional tolerances with superior surface finishes, guaranteeing consistent performance in the most demanding service conditions. --- #### **1. Chemical Composition (Weight %)** | 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 | * **Optimal Balance:** The strategic combination of **Chromium** (for oxidizing conditions) with **Molybdenum** and **Tungsten** (for reducing environments) provides comprehensive corrosion protection. The ultra-low **Carbon** content ensures immunity to sensitization during welding and heat treatment. --- #### **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) | | **Thermal Conductivity** | 6.5 Btu-ft/hr-ft²-°F (11.2 W/m·K) at 70°F | | **Mean Coefficient of Thermal Expansion** | 7.8 x 10⁻⁶ per °F (14.0 x 10⁻⁶ per °K) | | **Modulus of Elasticity** | 29.5 x 10⁶ psi (203 GPa) | --- #### **3. Mechanical Properties (Typical for Annealed Condition)** C-22 tubes are supplied in solution-annealed condition to maximize corrosion resistance and facilitate fabrication. | Property | Typical Value | | :--- | :--- | | **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** **Superior Corrosion Performance:** - **Universal Resistance:** Excellent performance in both oxidizing (nitric acid, ferric chloride) and reducing (hydrochloric acid, sulfuric acid) environments - **Localized Corrosion:** Exceptional resistance to pitting and crevice corrosion in chloride-containing solutions - **Stress Corrosion Cracking:** Highly resistant to chloride-induced SCC - **Mixed Chemical Environments:** Maintains stability in complex and fluctuating process streams - **Oxidizing Salts:** Resists attack from contaminated acids containing oxidizing metal ions **Critical Applications:** * **Heat Exchanger Tubes:** - Shell and tube heat exchangers handling corrosive media - Condenser tubes in chemical processing and refining - U-tubes for high-pressure service * **Instrumentation & Sampling Tubes:** - Pressure sensing lines - Chemical injection lines - Process analyzer sampling systems - Thermocouple protection sheaths * **Pharmaceutical & Bioprocessing:** - High-purity process tubing - Clean-in-place (CIP) and steam-in-place (SIP) systems - WFI (Water for Injection) distribution systems * **Chemical Processing:** - Reactor coil tubing - Jacketed piping systems - Transfer lines for aggressive chemicals * **Nuclear Industry:** - Instrumentation tubing in nuclear waste processing - Cooling system components --- #### **5. International Standards** Our Hastelloy C-22 Tubes comply with major international standards: **Primary Standards:** * **ASTM B622:** Seamless Nickel and Nickel Alloy Tube * **ASTM B626:** Welded Nickel and Nickel Alloy Tube * **ASME SB-622/SB-626:** Code qualification for pressure applications * **UNS:** **UNS N06022** * **EURONORM:** **2.4602** * **DIN:** DIN 17744 - NiCr21Mo14W **Technical Specifications:** * **Types:** Seamless (SMLS) and Welded (Welded & Cold-Worked) * **Sizes:** From 1/8" OD to 4" OD, various wall thicknesses * **Tolerances:** To ASTM specifications or custom requirements * **Condition:** Solution Annealed and Pickled/Passivated * **Surface Finish:** Standard mill finish or customized finishes available --- #### **Why Choose Our Hastelloy C-22 Tubes?** * **Uncompromising Quality:** Manufactured under strict quality control with complete traceability from melt to final product * **Technical Excellence:** Expert support for tube selection, fabrication, and application engineering * **Comprehensive Certification:** Supplied with full Mill Test Certificates meeting ASTM/ASME requirements * **Precision Manufacturing:** Consistent dimensions and superior surface finishes for reliable performance * **Application Expertise:** Deep understanding of corrosion challenges across multiple industries **Contact our technical team** for comprehensive specifications, sizing assistance, and application support. We provide tailored solutions for your most challenging tubing requirements. *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 2733 gallon liquid totes Special package is available on request.