Alloy W,Hastelloy W Bar(Round bar, Flat bar),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 Bar (Round Bar, Flat Bar) UNS N10004** **Overview** **Alloy W**, commercially known as **Hastelloy® W**, is a nickel-molybdenum-chromium alloy specifically formulated 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 **bar** product form, including both **round bars** and **flat bars**, is engineered for manufacturing high-strength components, structural elements, and specialized applications in aggressive chemical services and elevated temperature environments up to **980°C (1800°F)**. --- ### **1. Chemical Composition** The chemical composition of Hastelloy W (UNS N10004) bar 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 bar 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 bar products: | Property | Round Bar | Flat Bar | |----------|-----------|----------| | **Tensile Strength** | 690 - 860 MPa (100 - 125 ksi) | 680 - 850 MPa (99 - 123 ksi) | | **Yield Strength (0.2% Offset)** | 310 - 485 MPa (45 - 70 ksi) | 300 - 475 MPa (44 - 69 ksi) | | **Elongation (in 50mm)** | 45 - 60% | 40 - 55% | | **Hardness (Rockwell B)** | 85 - 100 HRB | 85 - 100 HRB | * **Corrosion Performance**: Excellent resistance to sulfuric, hydrochloric, and phosphoric acids; good resistance to stress corrosion cracking and oxidizing environments. --- ### **4. International Standards** Hastelloy W (UNS N10004) bar conforms to these 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 | --- ### **5. Product Applications** **Round Bar Applications:** * **Chemical Processing:** * Pump shafts and impellers * Valve stems and trim components * Mixer and agitator shafts * Reactor internals * **Industrial Equipment:** * Fasteners for corrosive service * Heat exchanger parts * Distillation column components * Processing equipment shafts **Flat Bar Applications:** * **Structural Components:** * Support rails for chemical equipment * Structural members in corrosive environments * Baffles and support grids * Framework for processing vessels * **Specialized Applications:** * Electrode holders * Chemical tank supports * Processing line structural elements * Equipment mounting systems --- ### **6. Fabrication Characteristics** * **Machinability**: Requires tools and techniques suitable for nickel-based alloys * **Welding**: Excellent weldability using GTAW, GMAW processes * **Heat Treatment**: Solution anneal at 1150-1200°C (2100-2190°F) * **Forming**: Good hot and cold working characteristics * **Surface Finish**: Hot rolled, cold drawn, or machined finishes available --- ### **7. Available Specifications** * **Round Bar Sizes**: 5mm to 300mm diameter * **Flat Bar Sizes**: 3mm to 150mm thickness, 10mm to 600mm width * **Length**: Standard random lengths or cut to size * **Condition**: Hot finished, annealed, or cold drawn --- **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.*

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 1873 gallon liquid totes Special package is available on request.