Alloy W,Hastelloy W Tube,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 Tube (UNS N10004)** **Overview** **Alloy W**, commercially known as **Hastelloy® W**, is a nickel-molybdenum-chromium alloy specifically engineered 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 **tube** product form is precision-manufactured for heat exchangers, instrument lines, and process applications involving aggressive chemicals, with reliable performance maintained up to **980°C (1800°F)**. --- ### **1. Chemical Composition** The chemical composition of Hastelloy W (UNS N10004) tube 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)**: Forms the austenitic matrix, providing fundamental corrosion resistance and microstructural stability. * **Mo (Molybdenum)**: Enhances resistance to reducing acids and prevents localized 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 tube 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 tube: | 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 | * **High-Temperature Performance**: Hastelloy W tube maintains excellent mechanical properties and corrosion resistance at elevated temperatures, particularly in acid environments and oxidizing conditions. --- ### **4. International Standards** Hastelloy W (UNS N10004) tube conforms to the following international standards: | Standard Body | Standard Designation | Specification | |---------------|----------------------|--------------| | **ASTM International** | **ASTM B622** | Seamless Pipe and Tube | | **ASTM International** | **ASTM B626** | Welded Tube | | **ASTM International** | **ASTM B619** | Welded Pipe | | **ASME** | **ASME SB-622/SB-626** | Pressure Vessel Applications | | **ASTM International** | **ASTM B163** | Seamless Condenser and Heat-Exchanger Tubes | | **European Standard** | **EN 10216-5** | Seamless Steel Tubes for Pressure Purposes | --- ### **5. Product Applications** Hastelloy W tube is extensively utilized in applications requiring superior corrosion resistance: **Heat Exchanger Applications:** - Shell and tube heat exchangers - Condenser and evaporator tubes - Process gas coolers - Acid cooling systems - Chemical process heat exchangers **Chemical Processing Industry:** - Sulfuric acid concentration systems - Hydrochloric acid handling equipment - Phosphoric acid processing units - Acid recovery plant components - Chemical synthesis reactors **Instrumentation & Process Applications:** - Thermocouple protection tubes - Instrumentation capillary tubing - Process sampling lines - Chemical injection tubing - Analytical system components **Pollution Control Equipment:** - Scrubber system tubing - FGD system components - Waste gas treatment units - Chemical recovery system tubing --- ### **6. Corrosion Resistance Performance** * **Excellent resistance** to sulfuric acid at all concentrations and temperatures * **Good performance** in hydrochloric acid services * **Superior resistance** to phosphoric acid environments * **Excellent resistance** to stress corrosion cracking * **Good performance** in mixed acid and chemical environments --- ### **7. Available Specifications** * **Size Range**: 1/8" to 8" OD * **Wall Thickness**: 0.028" to 0.500" * **Type**: Seamless and welded construction * **Temper**: Annealed or stress-relieved * **Surface Finish**: Pickled, bright annealed, or descaled --- ### **8. Fabrication & Quality Assurance** * **Weldability**: Excellent using GTAW, GMAW processes * **Forming**: Good bending and forming characteristics * **Heat Treatment**: Solution annealed at 1150-1200°C (2100-2190°F) * **Testing**: Hydrostatic testing, eddy current examination * **Certification**: EN 10204 3.1/3.2 material certificates --- **Disclaimer:** *Hastelloy® is a registered trademark of Haynes International. This information is for reference purposes only. 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 1875 gallon liquid totes Special package is available on request.