Alloy 825,Incoloy 825 Wire,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 Wire / 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 **Wire** product form, which is manufactured through drawing processes to achieve precise diameters and enhanced mechanical properties. Incoloy 825 Wire combines excellent corrosion resistance with good formability and strength, making it suitable for various industrial applications including fasteners, springs, and welding consumables. The designations **Alloy 825**, **Incoloy 825 Wire**, and **UNS N08825** refer to this corrosion-resistant nickel-base alloy supplied in wire form, typically available in diameters from 0.5 mm to 10 mm. --- #### **2. Key Characteristics** * **Excellent Corrosion Resistance:** Outstanding performance in both oxidizing and reducing environments * **Superior Acid Resistance:** Exceptional resistance to sulfuric acid, phosphoric acid, and other reducing acids * **Excellent Stress Corrosion Cracking Resistance:** Highly resistant to chloride-induced SCC * **Good Mechanical Properties:** High strength and excellent toughness * **Excellent Formability:** Can be cold formed and shaped * **Stabilized Against Sensitization:** Titanium addition prevents chromium carbide formation --- #### **3. Chemical Composition (Weight %)** The corrosion resistance of Alloy 825 Wire 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 | | **Copper (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) | --- #### **5. Mechanical Properties (Typical)** | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | | :--- | :--- | :--- | :--- | | **Annealed** | 550-690 | 240-380 | 30-45 | | **Hard Drawn** | 690-930 | 620-860 | 10-20 | | **Spring Temper** | 930-1170 | 860-1100 | 5-15 | --- #### **6. International Standards & Specifications** **Wire Products:** * **ASTM B425 / ASME SB425:** Standard Specification for UNS N08825 Bar and Wire * **ASTM B164 / ASME SB164:** Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire * **AMS 5871:** Aerospace Material Specification * **DIN 17750:** Nickel alloy wire specifications **Welding Wire Standards:** * **AWS A5.14 / SFA-5.14: ERNiFeCr-3** * **ISO 18274: S Ni 8065** **General Material Standards:** * **UNS:** N08825 * **EN:** 2.4858 (NiCr21Mo) * **DIN:** 2.4858 * **JIS:** NCF 825 --- #### **7. Product Forms & Availability** **Wire Forms:** * **Diameters:** 0.5 mm to 10.0 mm * **Tolerance:** ±0.05 mm for precision applications * **Condition:** Annealed, hard, spring temper * **Surface Finish:** Bright, pickled, or coated * **Packaging:** Spools, coils, or straight lengths **Special Wire Types:** * **Welding Wire:** ERNiFeCr-3 classification * **Spring Wire:** High tensile strength * **Fastener Wire:** Cold heading quality * **编织线:** For woven products --- #### **8. Applications** **Fastener Industry:** * Corrosion-resistant bolts and nuts * Specialized screws and studs * Marine fasteners * Chemical processing equipment fasteners **Spring Applications:** * Corrosion-resistant springs * Valve springs * Instrument springs * High-temperature springs **Welding Consumables:** * GTAW (TIG) welding wire * GMAW (MIG) welding wire * SAW welding wire * Cladding and overlay applications **Industrial Components:** * Wire mesh and screening * Filter elements * Electrical resistance wire * Chemical processing components **Other Applications:** * Medical device components * Food processing equipment * Marine and offshore components * Aerospace applications --- #### **9. Fabrication & Processing** **Wire Drawing:** * Multiple pass drawing with intermediate annealing * Controlled reduction per pass * Use of appropriate lubricants and dies **Forming Operations:** * **Cold Heading:** Suitable for fastener manufacturing * **Spring Coiling:** Various coil configurations possible * **Wire Weaving:** For mesh and filter applications * **Bending and Forming:** Good formability in annealed condition **Heat Treatment:** * **Solution Annealing:** 900-980°C (1650-1800°F) * **Stress Relieving:** 500-600°C (930-1110°F) * **Atmosphere Control:** Hydrogen or vacuum recommended **Welding Characteristics:** * **Weldability:** Excellent * **Filler Metal:** AWS A5.14 ERNiFeCr-3 * **Processes:** GTAW, GMAW, SAW * **Precautions:** Standard nickel alloy welding practices --- #### **10. Quality Assurance** * **Dimensional Control:** Precision diameter monitoring * **Surface Quality:** Visual and microscopic inspection * **Mechanical Testing:** Tensile, hardness, wrap tests * **Chemical Analysis:** Full composition verification * **Certification:** Full traceability with material certifications * **Packaging:** Protective packaging to prevent damage and contamination --- **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 1948 gallon liquid totes Special package is available on request.