NA-224 Nickel Alloy ,E FORU

**Product Overview: NA-224 Nickel Alloy** **NA-224** is a high-performance nickel-chromium alloy specifically engineered for exceptional oxidation resistance and high-temperature strength in extreme service conditions. This advanced solid-solution strengthened alloy demonstrates outstanding performance in oxidizing, carburizing, and sulfidizing environments, making it particularly suitable for high-temperature industrial heating applications and thermal processing equipment. --- ### **Key Characteristics & Advantages** - **Exceptional Oxidation Resistance**: Maintains integrity in air up to 1200°C (2192°F) - **Excellent High-Temperature Strength**: Retains mechanical properties under prolonged thermal exposure - **Superior Carburization Resistance**: Performs reliably in carbon-rich atmospheres - **Good Thermal Fatigue Resistance**: Withstands repeated thermal cycling - **Outstanding Sulfidation Resistance**: Resists attack in sulfur-containing environments - **Excellent Creep Rupture Strength**: Long-term durability under stress at elevated temperatures --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | Balance | Forms austenitic matrix and provides base corrosion resistance | | **Chromium (Cr)**| 20.0-24.0 | Primary element for oxidation and corrosion resistance | | **Iron (Fe)** | ≤5.0 | Controlled impurity | | **Cobalt (Co)** | ≤2.0 | Trace element | | **Tungsten (W)** | 3.5-4.5 | Solid solution strengthener | | **Molybdenum (Mo)**| 1.5-2.5 | Enhances high-temperature strength | | **Silicon (Si)** | 0.5-1.0 | Improves oxidation resistance | | **Manganese (Mn)**| ≤1.0 | Enhances hot workability | | **Carbon (C)** | 0.05-0.15 | Controlled for optimal high-temperature properties | | **Other Elements**| ≤0.5 | Controlled impurities | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.25 g/cm³ | At room temperature | | **Melting Range** | 1350-1400°C | Solidus-Liquidus | | **Thermal Expansion Coefficient**| 14.2 × 10⁻⁶/°C | 20-1000°C range | | **Thermal Conductivity** | 13.5 W/m·K | At 800°C | | **Specific Heat Capacity** | 450 J/kg·K | At 800°C | | **Electrical Resistivity** | 1.20 μΩ·m | At 20°C | | **Young's Modulus** | 205 GPa | At room temperature | --- ### **Mechanical Properties** | Property | Temperature | Typical Value | |------------------------|-------------|----------------------| | **Tensile Strength** | 20°C | 710-790 MPa | | **Tensile Strength** | 815°C | 390-460 MPa | | **Tensile Strength** | 980°C | 180-220 MPa | | **Yield Strength (0.2%)** | 20°C | 330-400 MPa | | **Yield Strength (0.2%)** | 815°C | 250-300 MPa | | **Elongation** | 20°C | 40-50% | | **Elongation** | 815°C | 35-45% | | **Creep Rupture Strength** | 980°C | 48 MPa (1000h) | --- ### **High-Temperature Performance** - **Maximum Service Temperature**: 1200°C (2192°F) in oxidizing atmospheres - **Oxidation Resistance**: Excellent scaling resistance up to 1150°C - **Cyclic Oxidation**: Outstanding performance under thermal cycling conditions - **Carburization Resistance**: Superior resistance to carbon absorption - **Sulfidation Resistance**: Good performance in sulfur-bearing environments --- ### **International Standards & Specifications** NA-224 complies with the following international standards: - **ASTM B435**: Nickel-Chromium Alloy Plate, Sheet, and Strip - **ASTM B572**: UNS N06224 Rod and Bar - **ASTM B619**: Welded Nickel Alloy Pipe - **ASME SB-435**: Boiler and Pressure Vessel Code Specification - **DIN 17752**: Nickel Alloys - Chemical Composition - **ISO 6207**: Nickel and Nickel Alloys - Plate, Sheet and Strip --- ### **Applications** 1. **Industrial Heating & Heat Treatment**: - Radiant tubes and retorts - Heat treatment fixtures and baskets - Annealing furnace components - Carburizing and nitriding equipment 2. **Chemical Processing**: - High-temperature reactors - Reformers and cracking tubes - Catalyst support systems - Process heaters and heat exchangers 3. **Power Generation**: - Heat recovery steam generators - Combustion system components - Gas turbine parts - Waste heat boilers 4. **Petrochemical Industry**: - Ethylene cracking furnaces - Steam methane reformers - Hydrocarbon processing equipment - Pyrolysis units 5. **Other Industrial Applications**: - Glass manufacturing equipment - Ceramic kiln components - Calciners and roasters - Thermal oxidizers --- ### **Fabrication Characteristics** - **Hot Working**: 1150-1200°C (2100-2190°F) with rapid cooling - **Cold Working**: Good ductility permits moderate cold forming - **Annealing**: 1120-1170°C followed by rapid cooling - **Welding**: Excellent weldability using matching filler metals - **Machining**: Requires appropriate tools and techniques for nickel alloys --- ### **Available Forms** - **Plate and Sheet**: Thickness from 0.5mm to 100mm - **Bar and Rod**: Diameters from 5mm to 300mm - **Pipe and Tube**: Seamless and welded, various schedules - **Wire and Strip**: For specialized electrical and heating applications - **Fittings and Flanges**: Complete piping system components - **Forged Products**: Custom shapes for specific applications --- **Disclaimer**: *The information provided is for technical reference purposes only. NA-224 is a specialized high-temperature alloy requiring proper processing and handling to achieve optimal performance. Actual properties may vary depending on manufacturing processes, heat treatment, and specific service conditions. Users should consult with qualified materials engineers and adhere to relevant industry standards and specifications for critical applications. Always refer to manufacturer's technical data sheets for specific application guidance and limitations.*

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 3112 gallon liquid totes Special package is available on request.