Alloy W,Hastelloy W Rod,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 Rod (UNS N10004)** **Overview** **Alloy W**, commercially known as **Hastelloy® W**, is a nickel-molybdenum-chromium alloy renowned for its outstanding corrosion resistance in severe environments. Designated as **UNS N10004**, this solid-solution strengthened nickel-based alloy offers exceptional performance in both oxidizing and reducing media. The **rod** product form is specifically engineered for machining high-strength components, fasteners, and structural elements that must withstand aggressive chemical environments and elevated temperatures up to **980°C (1800°F)**. --- ### **1. Chemical Composition** The chemical composition of Hastelloy W (UNS N10004) rod 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 rod 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 | | **Electrical Resistivity** | 1.30 μΩ·m | 790 ohm·cir mil/ft | --- ### **3. Mechanical Properties** Typical mechanical properties for annealed Hastelloy W rod: | Property | Typical Value | |----------|---------------| | **Tensile Strength** | 690 - 860 MPa (100 - 125 ksi) | | **Yield Strength (0.2% Offset)** | 310 - 485 MPa (45 - 70 ksi) | | **Elongation (in 50mm)** | 45 - 60% | | **Reduction of Area** | 50 - 70% | | **Hardness (Rockwell B)** | 85 - 100 HRB | * **High-Temperature Performance**: Hastelloy W rod maintains excellent mechanical properties and corrosion resistance at elevated temperatures, particularly in acid environments and oxidizing conditions. --- ### **4. International Standards** Hastelloy W (UNS N10004) rod conforms to the following international standards: | Standard Body | Standard Designation | Product Form | |---------------|----------------------|--------------| | **ASTM International** | **ASTM B572** | Rod/Bar | | **ASME** | **ASME SB-572** | Rod/Bar for Pressure Vessel Components | | **ASTM International** | **ASTM B366** | Wrought Fittings | | **Aerospace Material Specification** | **AMS 5759** | Bars, Forgings, and Rings | | **European Standard** | **EN 10095** | Heat-Resisting Steels and Nickel Alloys | | **UNS** | **N10004** | Unified Numbering System | --- ### **5. Product Applications** Hastelloy W rod is extensively used for machining components requiring superior corrosion resistance: **Chemical Processing Equipment:** - Pump shafts and impellers - Valve stems and trim components - Mixer and agitator shafts - Reactor internals and accessories - Fasteners for corrosive service **Pharmaceutical Industry:** - Reaction vessel components - Distillation column internals - Heat exchanger parts - Processing equipment shafts **Pollution Control Systems:** - Scrubber system components - FGD system fasteners - Waste treatment equipment parts - Chemical recovery system components **Industrial Manufacturing:** - High-strength fasteners - Corrosion-resistant springs - Machined components for acid service - Structural supports in corrosive environments --- ### **6. Corrosion Resistance** * **Excellent resistance** to sulfuric acid at all concentrations * **Good performance** in hydrochloric and phosphoric acids * **Superior resistance** to stress corrosion cracking * **Excellent performance** in mixed acid environments * **Good oxidation resistance** at elevated temperatures --- ### **7. Machining and Fabrication** * **Machinability**: Similar to other nickel-based alloys; requires appropriate tools and techniques * **Welding**: Excellent weldability using GTAW, GMAW, and SMAW processes * **Heat Treatment**: Solution annealed at 1150-1200°C (2100-2190°F) * **Cold Working**: Good ductility permits cold forming operations * **Surface Finish**: Available in hot finished, turned, or polished conditions --- ### **8. Available Specifications** * **Diameter Range**: 5mm to 300mm (0.197" to 12") * **Length**: Standard random lengths or cut to size * **Condition**: Annealed, hot finished, or cold drawn * **Surface Quality**: Black, descaled, or machined finish --- **Disclaimer:** *Hastelloy® is a registered trademark of Haynes International. This information is for reference purposes only. Mechanical properties may vary with rod diameter and processing history. For critical applications, always consult the appropriate material standards and obtain certified test reports from the manufacturer.*

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 1872 gallon liquid totes Special package is available on request.