Nickel Molybdenu Alloy,Alloy 20 Thermocouple Alloy,Ni18Mo Alloy,E FORU

**Product Overview: Nickel Molybdenum Alloy 20 (Ni18Mo Alloy / Thermocouple Alloy)** Alloy 20, also known as Ni18Mo Alloy, is a specialized nickel-molybdenum thermocouple alloy designed for precise temperature measurement in high-temperature and corrosive environments. As a key component in certain high-performance thermocouple systems, this alloy delivers excellent thermoelectric stability, corrosion resistance, and reliable performance across a wide temperature range, making it suitable for demanding industrial and scientific applications. --- ### **Key Characteristics & Advantages** - **Excellent Corrosion Resistance**: Withstands harsh chemical environments including sulfuric and phosphoric acids - **Stable Thermoelectric Properties**: Maintains consistent EMF output at elevated temperatures - **High-Temperature Capability**: Suitable for continuous use up to 1100°C (2012°F) - **Good Mechanical Strength**: Retains structural integrity under thermal stress - **Oxidation Resistance**: Performs well in oxidizing atmospheres --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | Balance | Base element providing corrosion resistance and stability | | **Molybdenum (Mo)** | 17.0–20.0 | Enhances corrosion resistance and high-temperature strength | | **Iron (Fe)** | ≤5.0 | Controlled for optimal performance | | **Chromium (Cr)**| 1.0–3.0 | Improves oxidation resistance | | **Manganese (Mn)**| ≤1.0 | Aids in manufacturability | | **Copper (Cu)** | 1.0–3.0 | Enhances sulfuric acid resistance | | **Other Elements**| ≤0.5 | Residual elements | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.9 g/cm³ | At room temperature | | **Melting Point** | ~1370°C | Approximate | | **Thermal Expansion Coefficient**| 14.2 × 10⁻⁶/°C | 20–1000°C range | | **Thermal Conductivity** | 12.5 W/m·K | At 20°C | | **Electrical Resistivity** | 1.12 μΩ·m | At 20°C | | **Seebeck Coefficient** | Specific to thermocouple type | Paired with corresponding positive leg | --- ### **Mechanical Properties** | Property | Typical Value | Test Conditions | |------------------------|----------------------|----------------------------| | **Tensile Strength** | 580–720 MPa | At room temperature | | **Yield Strength** | 260–350 MPa | At 0.2% offset | | **Elongation** | 30–45% | In 50 mm | | **Hardness** | 140–180 HB | Annealed condition | --- ### **International Standards & Specifications** Alloy 20 complies with the following international standards: - **ASTM B473**: Standard for UNS N08020 Nickel Alloy Bar and Wire - **ASTM B729**: Standard for Seamless UNS N08020 Alloy Pipe and Tube - **ASME SB473/SB729**: Pressure vessel applications - **ISO 6208**: Plate, sheet and strip - **DIN 17744**: Nickel-molybdenum alloys --- ### **Applications** 1. **Chemical Processing Industry**: - Reactors, distillation columns, and heat exchangers - Piping systems and storage tanks for corrosive chemicals - Sulfuric acid production equipment 2. **Temperature Measurement**: - Specialized thermocouple systems for corrosive environments - High-temperature process monitoring - Laboratory and testing equipment 3. **Pharmaceutical Industry**: - Reaction vessels and processing equipment - High-purity chemical handling systems 4. **Pollution Control**: - Scrubbers and waste treatment systems - Flue gas desulfurization equipment --- ### **Available Forms** - **Wire**: Various diameters for thermocouple and instrument applications - **Sheet and Plate**: For vessel and tank construction - **Pipe and Tube**: For chemical processing systems - **Bar and Rod**: For mechanical components - **Fittings and Flanges**: Complete piping systems --- **Disclaimer**: *The information provided is for reference purposes. Actual performance may vary depending on specific environmental conditions, manufacturing processes, and application requirements. Users should verify suitability for their specific applications and adhere to all relevant industry standards and safety guidelines. Consult with materials engineers 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 3101 gallon liquid totes Special package is available on request.