Alloy 825,Incoloy 825 Strip,UNS N08825,E FORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA16，American Specs:ASTM B425 ASTM B424 ASTM B163 (Tube *)，German Specs:WS 2.4858

### **Technical Datasheet: Alloy 825 / Incoloy 825 Strip / UNS N08825** --- #### **1. Overview** **Alloy 825** (commercially known as **Incoloy® 825**) is a nickel-iron-chromium alloy engineered with molybdenum and copper additions for exceptional corrosion resistance in aggressive environments. This datasheet specifically addresses the **Strip** product form, characterized by its thin, narrow configuration typically supplied in coiled form. Incoloy 825 Strip combines excellent corrosion resistance with good formability, making it ideal for precision components, electrical applications, and specialized industrial uses where both corrosion resistance and specific dimensional requirements are critical. The designations **Alloy 825**, **Incoloy 825 Strip**, and **UNS N08825** refer to this corrosion-resistant nickel-base alloy supplied in strip form, generally defined as material under 6mm in thickness and various widths. --- #### **2. Key Characteristics** * **Excellent Corrosion Resistance:** Outstanding performance in both oxidizing and reducing environments * **Superior Acid Resistance:** Exceptional resistance to sulfuric and phosphoric acids * **Excellent Stress Corrosion Cracking Resistance:** Highly resistant to chloride-induced SCC * **Good Formability and Spring Properties:** Suitable for precision forming and spring applications * **Consistent Mechanical Properties:** Uniform characteristics throughout the strip length * **Stabilized Against Sensitization:** Titanium addition prevents chromium carbide formation --- #### **3. Chemical Composition (Weight %)** The corrosion resistance of Alloy 825 Strip is ensured by its precise chemical balance. | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | 38.0 | 46.0 | Provides fundamental corrosion resistance in reducing environments | | **Chromium (Cr)** | 19.5 | 23.5 | Confers resistance to oxidizing environments | | **Iron (Fe)** | 22.0 min | Balance | Base element of the alloy | | **Molybdenum (Mo)** | 2.5 | 3.5 | Enhances pitting and crevice corrosion resistance | | **Cu (Cu)** | 1.5 | 3.0 | Provides resistance to reducing acids, particularly sulfuric acid | | **Titanium (Ti)** | 0.6 | 1.2 | Stabilizes against sensitization by forming titanium carbides | | **Carbon (C)** | - | 0.05 | Kept low to minimize carbide formation | | **Manganese (Mn)** | - | 1.00 | - | | **Sulfur (S)** | - | 0.03 | - | | **Silicon (Si)** | - | 0.05 | - | --- #### **4. Physical Properties (Typical)** | Property | Value | | :--- | :--- | | **Density** | 8.14 g/cm³ (0.294 lb/in³) | | **Melting Range** | 1370 - 1400 °C (2500 - 2550 °F) | | **Specific Heat (20°C)** | 440 J/kg·K | | **Thermal Conductivity** | 10.8 W/m·K (at 100°C) | | **Mean Coefficient of Thermal Expansion** | 14.0 μm/m·K (20 - 100°C) | | **Electrical Resistivity** | 1.12 μΩ·m | | **Modulus of Elasticity** | 196 GPa (28.4 x 10⁶ psi) | | **Thermal Conductivity** | 10.8 W/m·K | --- #### **5. Mechanical Properties (Typical for Annealed Strip)** * **Tensile Strength:** 586-689 MPa (85-100 ksi) * **Yield Strength (0.2% Offset):** 241-345 MPa (35-50 ksi) * **Elongation:** 30% min * **Hardness:** Rb 65-85 * **Spring Temper Properties:** Available with tensile strength up to 1100 MPa (160 ksi) --- #### **6. International Standards & Specifications** **Strip Products:** * **ASTM B424 / ASME SB424:** Standard Specification for UNS N08825 Plate, Sheet, and Strip * **ASTM B906:** Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys * **AMS 5871:** Aerospace Material Specification * **EN 10095:** Heat resisting steels and nickel alloys **Dimensional Standards:** * **Thickness Range:** Typically 0.05mm to 6.0mm * **Width Range:** Up to 600mm (depending on manufacturer) * **ASTM B906:** Covers dimensional tolerances for strip products **General Material Standards:** * **UNS:** N08825 * **EN (Euronorm):** EN 2.4858 (NiCr21Mo) * **DIN:** 2.4858 * **ISO:** 6207 (Nickel alloy strip) --- #### **7. Applications** **Electrical and Electronic Components:** * Battery and fuel cell components * Electrical contacts and springs * Semiconductor processing equipment * Electronic connector components **Industrial Components:** * Precision springs for corrosive environments * Diaphragms and bellows * Fasteners and small mechanical parts * Chemical processing equipment components **Automotive and Aerospace:** * Sensor components * Spring elements in corrosive environments * Fastener systems * Specialized mechanical components **Chemical Processing:** * Gaskets and sealing elements * Filter components * Small vessel linings * Laboratory equipment components **Other Specialized Applications:** * Medical device components * Food processing equipment parts * Pharmaceutical manufacturing components * Precision instrument parts --- #### **8. Fabrication Notes** * **Forming:** Excellent cold forming characteristics; suitable for deep drawing, bending, and stamping operations * **Heat Treatment:** Solution anneal at **900-980°C (1650-1800°F)** followed by rapid cooling for optimal properties * **Welding:** Can be welded using GTAW and resistance welding methods with matching filler metals * **Surface Finish:** Available in various finishes including 2B, BA, and polished surfaces * **Slitting:** Can be precision slit to specific width requirements * **Temper Selection:** Available in various tempers including annealed, quarter-hard, half-hard, and full-hard to suit specific application requirements --- **Disclaimer:** This technical information is for reference purposes. For critical applications, always consult the specific material certification and the latest version of the relevant standards. Actual properties may vary depending on manufacturing processes and heat treatment.

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 1943 gallon liquid totes Special package is available on request.