INCOLOY alloy 890 Ni-Cr-Fe Superalloy,UNS N08890; 1

### **Product Introduction: INCOLOY® Alloy 890 (UNS N08890)** **INCOLOY® Alloy 890** is a nickel-chromium-iron superalloy specifically designed to provide outstanding resistance to high-temperature corrosion, including oxidation, carburization, and sulfidation. This advanced alloy offers an optimal balance of high-temperature strength, structural stability, and environmental resistance, making it particularly suitable for demanding applications in thermal processing, chemical processing, and power generation industries. The alloy's carefully engineered composition creates a highly stable, protective chromium oxide scale that ensures long-term performance in aggressive high-temperature environments where conventional materials would rapidly degrade. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | 32.0 - 37.0 | | **Chromium (Cr)** | 24.0 - 27.0 | | **Iron (Fe)** | Balance | | **Silicon (Si)** | 0.75 - 1.50 | | **Manganese (Mn)** | 1.50 max | | **Carbon (C)** | 0.10 - 0.20 | | **Nitrogen (N)** | 0.15 - 0.30 | | **Aluminum (Al)** | 0.50 max | | **Copper (Cu)** | 0.50 max | | **Phosphorus (P)** | 0.030 max | | **Sulfur (S)** | 0.015 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 7.94 g/cm³ | | **Melting Point** | 1370 - 1420 °C | | **Thermal Conductivity** | 13.0 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.02 μΩ·m | | **Modulus of Elasticity** | 200 GPa | | **Coefficient of Thermal Expansion** | 15.2 μm/m·°C (20-1000°C) | | **Specific Heat Capacity** | 495 J/kg·K | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties** **Room Temperature Properties:** - **Tensile Strength:** 620 - 860 MPa - **Yield Strength (0.2% Offset):** 310 - 550 MPa - **Elongation:** 35 - 45% - **Hardness:** 85 - 100 HRB **High-Temperature Performance:** - **Creep Rupture Strength (980°C/1000h):** 25 MPa - **Tensile Strength at 870°C:** 200 MPa - **Yield Strength at 870°C:** 140 MPa - **Maximum Service Temperature:** 1150°C --- ### **Key Characteristics & Advantages** 1. **Exceptional High-Temperature Resistance** - Superior oxidation resistance up to 1150°C - Excellent resistance to carburization and metal dusting - Good sulfidation resistance in sulfur-containing environments 2. **Enhanced Microstructural Stability** - Controlled precipitation behavior - Resistance to sigma phase formation - Stable mechanical properties during long-term exposure 3. **Optimized Mechanical Properties** - Good creep and stress rupture strength - Excellent thermal fatigue resistance - Adequate ductility and toughness 4. **Excellent Fabricability** - Good weldability using conventional methods - Suitable for hot and cold working operations - Can be machined using standard techniques --- ### **Product Applications** **Thermal Processing Industry:** - Radiant tubes and retorts - Furnace muffles and rollers - Heat treatment fixtures - Annealing covers and baskets **Chemical Processing:** - Ethylene cracking furnace tubes - Reformer tubes and components - High-temperature reactors - Process heater tubes **Power Generation:** - Boiler components - Heat recovery systems - Superheater tubes - Power plant tubing **Industrial Applications:** - Petrochemical equipment - Heat exchanger tubing - Process piping systems - Industrial furnace components --- ### **International Standards** | Standard Type | Standard Number | Product Form | |---------------|-----------------|--------------| | **UNS** | N08890 | Unified Numbering System | | **ASTM** | B407 | Seamless Pipe and Tube | | **ASTM** | B408 | Rod and Bar | | **ASTM** | B409 | Plate, Sheet, and Strip | | **ASTM** | B906 | General Requirements for Flat Products | --- ### **Summary** **INCOLOY® Alloy 890 (UNS N08890)** represents a significant advancement in nickel-chromium-iron superalloy technology, offering exceptional high-temperature corrosion resistance combined with excellent mechanical properties and microstructural stability. Its optimized composition provides superior performance in aggressive environments including oxidizing, carburizing, and sulfidizing atmospheres at temperatures up to 1150°C. The alloy's balanced combination of properties makes it particularly valuable for critical components in thermal processing, chemical processing, and power generation applications where reliability and long-term performance are essential. Comprehensive certification to major ASTM standards including B407, B408, B409, and B906 ensures consistent quality and reliability, providing engineers with a proven material solution for demanding high-temperature applications where conventional materials would rapidly degrade. The alloy's excellent fabricability and weldability further enhance its value as a cost-effective solution for advancing efficiency and reliability in high-temperature industrial processes.

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 3354 gallon liquid totes Special package is available on request.