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

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

### **Product Introduction: Alloy 22 (Hastelloy® C-22) Rod / UNS N06022** **Precision Bar Stock for Machining Critical Components in Severe Environments** **Hastelloy® C-22 Rod** (UNS N06022) is a nickel-chromium-molybdenum-tungsten alloy bar stock renowned for its exceptional, versatile corrosion resistance. It is engineered to withstand the most aggressive chemical environments, including strong oxidizers, reducing acids, and localized attacks such as pitting and crevice corrosion. As a raw material for machining, our C-22 rod provides the ideal combination of superior machinability in its annealed state and outstanding mechanical properties in the finished part, making it the premier choice for manufacturing critical components in chemical processing, pollution control, and other demanding industries. --- #### **1. Chemical Composition (Weight %)** The balanced composition is the key to its all-around corrosion resistance and stability. | 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 | *Key Feature:* The optimized balance of **Chromium** (for oxidizing media) and **Molybdenum & Tungsten** (for reducing media) provides unmatched resistance to a broad spectrum of corrodents. The low **Carbon** content minimizes susceptibility to intergranular attack in the heat-affected zone after welding. --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 0.315 lb/in³ (8.69 g/cm³) | | **Melting Point** | 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 rod is typically supplied in the hot-finished and solution-annealed condition to optimize machinability and ensure uniform corrosion resistance. | 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 | *Note:* The alloy can be cold worked to significantly higher strength levels, but this may affect corrosion resistance in certain environments. --- #### **4. Corrosion Resistance & Product Applications** C-22 Rod is machined into components that must survive the most challenging corrosive environments. * **Excellent Resistance To:** * **Oxidizing Acids:** Nitric acid, Aqua Regia. * **Reducing Acids:** Hydrochloric, Sulfuric acids. * **Localized Corrosion:** Superior resistance to pitting and crevice corrosion in chloride-containing solutions. * **Stress Corrosion Cracking (SCC):** Highly resistant to chloride-induced SCC. * **Mixed Acids:** Handles complex mixtures like HNO₃/HF used in pickling. * **Typical Machined Components from C-22 Rod:** * **Chemical Processing Industry (CPI):** * Pump shafts, impellers, and valve stems * Agitators, mixer shafts, and fasteners * Spray nozzles, thermowells, and seal rings * **Pollution Control & FGD Systems:** * Scrubber internals, bearing sleeves, and damper shafts * Fasteners and hardwear for hot, wet, chloride-laden environments * **Pharmaceutical & Fine Chemical:** * Precision parts for reactors and fluid handling systems * Components requiring high purity and resistance to corrosive cleaning agents * **Waste Processing:** * Valve components and fittings for nuclear waste processing * Agitator shafts for hazardous waste treatment vessels --- #### **5. International Standards** Hastelloy C-22 Rod is supplied in compliance with major international standards. **Primary Material Standard for Rod/Bar:** * **ASTM:** **ASTM B574** (Standard Specification for Low-Carbon Nickel-Chromium-Molybdenum, Nickel-Chromium-Molybdenum-Tungsten Alloy Rod and Bar) * **UNS:** **UNS N06022** * **ASME:** SA SB-574 * **EURONORM:** **2.4602** * **DIN:** DIN 17744 - NiCr21Mo14W **Common Specifications:** * **Diameter Range:** Available from fractional inches (e.g., 1/4") to several inches in diameter. * **Condition:** Typically supplied in Solution Annealed and Pickled condition. * **Form:** Round, Hexagonal, and Square bars. --- #### **Why Choose Our Hastelloy C-22 Rod?** * **Unmatched Corrosion Versatility:** Provides the widest resistance spectrum of any nickel-based alloy in its class, ensuring long service life for machined components. * **Superior Machinability:** Supplied in an optimized annealed condition for good tool life and surface finish, allowing for the production of complex and high-precision parts. * **Consistent Quality & Structure:** Our rod is produced to ensure a uniform, fine-grained microstructure, which is critical for predictable machining behavior and optimal corrosion resistance. * **Full Traceability:** All materials are supplied with complete Mill Test Certificates (MTC/CMTR) verifying compliance with ASTM B574 and other specified standards, providing full traceability to the melt heat. * **Technical Expertise:** We provide support for material selection and machining guidelines to help you achieve the best results in your manufacturing process. **For detailed specifications on available diameters, pricing, and technical data sheets, please contact our sales team. We are your trusted supplier for high-performance corrosion-resistant bar stock.** *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 2730 gallon liquid totes Special package is available on request.