Alloy W,Hastelloy W Other/Similar Specs,UNS N10004,E FORU

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

### **Technical Datasheet: Alloy W / Hastelloy® W (UNS N10004) & Equivalent Specifications** --- #### **1. Product Overview** **Alloy W** (commercially known as **Hastelloy® W**) is a nickel-molybdenum-chromium alloy designed for exceptional corrosion resistance in severe environments. Designated as **UNS N10004**, this solid-solution strengthened superalloy performs reliably in oxidizing and reducing media, making it suitable for highly corrosive applications across industries such as chemical processing, pharmaceuticals, and pollution control. --- #### **2. Chemical Composition** The nominal composition of Hastelloy W (UNS N10004) is as follows: | Element | Content (%) | |---------|-------------| | Nickel (Ni) | Balance | | Molybdenum (Mo) | 23.0–26.0 | | Chromium (Cr) | 4.5–7.0 | | Iron (Fe) | 4.0–7.0 | | Tungsten (W) | 0.5–1.5 | | Cobalt (Co) | ≤ 2.5 | | Manganese (Mn) | ≤ 1.0 | | Silicon (Si) | ≤ 1.0 | | Carbon (C) | ≤ 0.12 | | Vanadium (V) | ≤ 0.2 | | Sulfur (S) | ≤ 0.03 | | Phosphorus (P) | ≤ 0.04 | --- #### **3. Physical Properties** | Property | Value | |----------|-------| | Density | 8.94 g/cm³ | | Melting Range | 1330–1380°C | | Specific Heat (20°C) | 442 J/kg·K | | Thermal Conductivity (20°C) | 10.9 W/m·K | | Coefficient of Thermal Expansion (20–100°C) | 11.5 µm/m·°C | | Modulus of Elasticity | 205 GPa | --- #### **4. Mechanical Properties (Annealed Condition)** | Property | Value | |----------|-------| | Tensile Strength | 690–860 MPa | | Yield Strength (0.2% Offset) | 310–485 MPa | | Elongation | 45–60% | | Hardness (Rockwell B) | 85–100 HRB | --- #### **5. International Standards & Equivalent Specifications** Hastelloy W is recognized under the following international standards: | Country/Region | Standard | Equivalent Designation | |----------------|----------|------------------------| | USA | ASTM B366 | UNS N10004 | | USA | ASME SB366 | UNS N10004 | | Europe | EN 10095 | NiMo16Cr15W | | Germany | DIN 17744 | W.Nr. 2.4814 | | France | AFNOR | NU30Mo16Cr | | Japan | JIS H4551 | NW 4401 | | China | GB/T 15008 | NS321 | --- #### **6. Key Features & Applications** **Key Features:** - Excellent resistance to sulfuric, hydrochloric, and phosphoric acids - Good resistance to oxidizing and reducing environments - High strength and ductility over a wide temperature range - Suitable for service up to 980°C (1800°F) **Typical Applications:** - Chemical processing equipment (reactors, heat exchangers, columns) - Sulfuric acid pickling systems - Phosphoric acid evaporators - Pharmaceutical manufacturing components - Flue gas desulfurization (FGD) systems - Pollution control scrubbers --- #### **7. Similar & Alternative Alloys** - **Hastelloy B-2 (UNS N10665)**: Higher molybdenum, better reducing acid resistance - **Hastelloy B-3 (UNS N10675)**: Improved thermal stability and corrosion resistance - **Hastelloy C-276 (UNS N10276)**: Enhanced corrosion resistance in oxidizing chloride environments --- #### **8. Fabrication Notes** - **Welding**: Use matching filler metals (e.g., ERNiMo-16 for GTAW/GMAW) - **Heat Treatment**: Solution anneal at 1150–1200°C followed by rapid cooling - **Machining**: Use slow speeds, high feed rates, and positive rake tools --- **Disclaimer:** *Hastelloy® is a registered trademark of Haynes International. The information provided is indicative and intended for reference purposes. For specific applications, always consult the latest material standards and 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 1881 gallon liquid totes Special package is available on request.