Alloy W,Hastelloy W Fittings,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 Fittings (UNS N10004)** **Overview** **Alloy W**, commercially known as **Hastelloy® W**, is a nickel-molybdenum-chromium superalloy 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. **Hastelloy W fittings** are precision-manufactured components designed to maintain system integrity in aggressive chemical services, providing reliable connections in piping systems handling corrosive fluids at temperatures up to **980°C (1800°F)**. --- ### **1. Chemical Composition** The chemical composition of Hastelloy W (UNS N10004) fittings 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 fittings: | 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 Hastelloy W fittings: | Property | Typical Value | |----------|---------------| | **Tensile Strength** | 690 - 860 MPa (100 - 125 ksi) | | **Yield Strength (0.2% Offset)** | 310 - 485 MPa (45 - 70 ksi) | | **Elongation** | 45 - 60% | | **Hardness (Rockwell B)** | 85 - 100 HRB | * **Pressure-Temperature Ratings**: Fittings maintain excellent mechanical integrity and corrosion resistance across their entire pressure-temperature rating range. --- ### **4. International Standards** Hastelloy W (UNS N10004) fittings conform to the following international standards: | Standard Body | Standard Designation | Fitting Type | |---------------|----------------------|--------------| | **ASTM International** | **ASTM B366** | Wrought Alloy Fittings | | **ASME** | **ASME SB-366** | Pressure Vessel Fittings | | **ASME B16.9** | **ASME B16.9** | Factory-Made Wrought Buttwelding Fittings | | **ASME B16.11** | **ASME B16.11** | Forged Steel Fittings, Socket-Welding and Threaded | | **MSS** | **MSS SP-43** | Wrought Stainless Steel Fittings | --- ### **5. Product Applications & Types** **Common Fitting Types:** * **Butt-Weld Fittings**: Elbows (45°, 90°, 180°), Tees, Reducers, Caps * **Socket-Weld Fittings**: Unions, Elbows, Tees, Couplings * **Threaded Fittings**: Nipples, Couplings, Elbows, Tees * **Flanges**: Slip-on, Weld Neck, Blind, Socket Weld * **Special Fittings**: Instrumentation connectors, thermowell fittings **Industry Applications:** * **Chemical & Petrochemical Processing:** * Sulfuric acid production systems * Hydrochloric acid handling systems * Phosphoric acid processing lines * Chemical synthesis plants * **Pharmaceutical Industry:** * Acid handling systems * Chemical transfer lines * Process piping systems * Utility distribution systems * **Pollution Control:** * Flue gas desulfurization systems * Scrubber system piping * Chemical waste treatment lines * Acid neutralization systems * **Industrial Processing:** * Metal pickling lines * Acid recovery plants * Chemical processing equipment * High-temperature process systems --- ### **6. Corrosion Resistance** * **Excellent resistance** to sulfuric acid at all concentrations * **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. Manufacturing & Quality Assurance** * **Manufacturing Process**: Hot forging, machining, and heat treatment * **Heat Treatment**: Solution annealed at 1150-1200°C (2100-2190°F) * **Testing**: Hydrostatic testing, dye penetrant inspection, dimensional verification * **Certification**: EN 10204 3.1/3.2, NACE MR0175 compliant * **Surface Treatment**: Pickling and passivation available --- **Disclaimer:** *Hastelloy® is a registered trademark of Haynes International. This information is for reference purposes only. Fitting performance depends on proper design, installation, and adherence to applicable codes and standards. Always consult the appropriate material specification and obtain certified documentation from the manufacturer for critical applications.*

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 1879 gallon liquid totes Special package is available on request.