Alloy W,Hastelloy W Pipe,UNS N10004,E FORU

British Specs:，American Specs:AMS 5755 Bar and Forgings AMS 5786 Welding Wire，German Specs:

### **Product Datasheet: Alloy W / Hastelloy® W Pipe (UNS N10004)** **Overview** **Alloy W**, commercially known as **Hastelloy® W**, is a nickel-molybdenum-chromium alloy specifically designed for exceptional corrosion resistance in severe chemical environments. Designated as **UNS N10004**, this solid-solution strengthened nickel-based alloy offers outstanding performance in both oxidizing and reducing media. The **pipe** product form is engineered for conveying aggressive chemicals, acids, and high-temperature process fluids, maintaining reliable performance in temperatures up to **980°C (1800°F)**. --- ### **1. Chemical Composition** The chemical composition of Hastelloy W (UNS N10004) pipe conforms to the following specifications (balance is Nickel): | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | Balance | | **Molybdenum (Mo)** | 23.0 - 26.0 | | **Chromium (Cr)** | 4.5 - 7.0 | | **Iron (Fe)** | 4.0 - 7.0 | | **Cobalt (Co)** | ≤ 2.5 | | **Tungsten (W)** | 0.5 - 1.5 | | **Manganese (Mn)** | ≤ 1.0 | | **Silicon (Si)** | ≤ 1.0 | | **Vanadium (V)** | ≤ 0.2 | | **Carbon (C)** | ≤ 0.12 | | **Phosphorus (P)** | ≤ 0.04 | | **Sulfur (S)** | ≤ 0.03 | * **Functional Role of Key Elements:** * **Ni (Nickel)**: Provides the austenitic matrix for superior corrosion resistance and thermal stability. * **Mo (Molybdenum)**: Enhances resistance to reducing acids and prevents pitting corrosion. * **Cr (Chromium)**: Improves resistance to oxidizing environments and high-temperature oxidation. * **W (Tungsten)**: Provides solid-solution strengthening and enhances overall corrosion resistance. --- ### **2. Physical Properties** Characteristic physical properties for Hastelloy W pipe at room temperature: | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Density** | 8.94 g/cm³ | 0.323 lb/in³ | | **Melting Point** | 1330 - 1380 °C | 2425 - 2515 °F | | **Specific Heat (20°C)** | 442 J/kg·K | 0.106 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 10.9 W/m·K | 75.6 Btu·in/hr·ft²·°F | | **Mean Coefficient of Thermal Expansion (20-100°C)** | 11.5 μm/m·°C | 6.4 x10⁻⁶ in/in·°F | | **Modulus of Elasticity** | 205 GPa | 29.7 x 10⁶ psi | --- ### **3. Mechanical Properties** Typical mechanical properties for annealed Hastelloy W pipe: | Property | Typical Value | |----------|---------------| | **Tensile Strength** | 680 - 850 MPa (99 - 123 ksi) | | **Yield Strength (0.2% Offset)** | 300 - 475 MPa (44 - 69 ksi) | | **Elongation (in 50mm)** | 40 - 55% | | **Hardness (Rockwell B)** | 85 - 100 HRB | * **Corrosion Performance**: Excellent resistance to sulfuric acid at all concentrations, good performance in hydrochloric and phosphoric acids, and superior resistance to stress corrosion cracking. --- ### **4. International Standards** Hastelloy W (UNS N10004) pipe conforms to these international standards: | Standard Body | Standard Designation | Specification | |---------------|----------------------|--------------| | **ASTM International** | **ASTM B619** | Welded Pipe | | **ASTM International** | **ASTM B622** | Seamless Pipe and Tube | | **ASTM International** | **ASTM B626** | Welded Tube | | **ASME** | **ASME SB-619/SB-622/SB-626** | Pressure Vessel Applications | | **ASTM International** | **ASTM B729** | Seamless UNS N08020 Pipe | | **European Standard** | **EN 10216-5** | Seamless Steel Tubes for Pressure Purposes | --- ### **5. Product Applications** Hastelloy W pipe is specified for critical corrosive service applications across multiple industries: **Chemical & Petrochemical Processing:** - Sulfuric acid production and handling systems - Hydrochloric acid transfer lines - Phosphoric acid processing piping - Acid concentration and evaporation systems - Chemical synthesis process lines **Pharmaceutical Industry:** - Reaction vessel transfer lines - Distillation system piping - Acid handling and distribution systems - Process water and chemical waste lines **Pollution Control Systems:** - Flue gas desulfurization (FGD) piping - Scrubber system process lines - Chemical waste treatment piping - Acid neutralization system components **Industrial Processing:** - Metal pickling and treatment lines - Acid recovery plant piping - Chemical processing equipment - High-temperature process transfer lines --- ### **6. Corrosion Resistance Characteristics** - **Excellent resistance** to sulfuric acid at all concentrations and temperatures - **Good performance** in hydrochloric acid up to boiling point - **Superior resistance** to phosphoric acid in various concentrations - **Excellent resistance** to stress corrosion cracking - **Good performance** in mixed acid environments --- ### **7. Available Specifications** - **Size Range**: 1/8" to 24" NPS - **Schedule**: SCH 10S to SCH XXS - **Type**: Seamless and welded construction - **Length**: Single random, double random, cut to length - **Ends**: Plain end, beveled end, threaded and coupled --- ### **8. Fabrication & Installation** - **Weldability**: Excellent using GTAW, GMAW processes with matching filler metals - **Forming**: Good cold and hot forming characteristics - **Heat Treatment**: Solution anneal at 1150-1200°C (2100-2190°F) - **Installation**: Standard piping practices with consideration for thermal expansion --- **Disclaimer:** *Hastelloy® is a registered trademark of Haynes International. This information is for reference purposes. Always consult relevant material standards and manufacturer's technical data sheets for certified properties. Performance in specific applications should be verified through appropriate testing and corrosion evaluation.*

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 1874 gallon liquid totes Special package is available on request.