Alloy 925,Incoloy 925 Strip,UNS N09925,E FORU

British Specs:，American Specs:，German Specs:

### **Product Datasheet: Alloy 925 / Incoloy 925 Strip (UNS N09925)** **Alloy 925** (commercially known as **Incoloy 925**) strip is a precipitation-hardenable nickel-iron-chromium alloy supplied in thin, narrow coiled form, offering exceptional corrosion resistance combined with high strength and excellent formability. This product form is specifically designed for precision applications requiring tight tolerances, consistent properties, and reliable performance in aggressive environments. --- #### **1. Chemical Composition** The chemical composition of Alloy 925 strip is precisely controlled to ensure consistent performance: | Element | Content (%) | |:---|:---| | **Nickel (Ni)** | 42.0 - 46.0 | | **Chromium (Cr)** | 19.5 - 23.5 | | **Iron (Fe)** | 22.0 min | | **Molybdenum (Mo)** | 2.5 - 3.5 | | **Copper (Cu)** | 1.5 - 3.0 | | **Titanium (Ti)** | 1.9 - 2.4 | | **Aluminum (Al)** | 0.1 - 0.5 | | **Carbon (C)** | 0.03 max | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.50 max | | **Sulfur (S)** | 0.03 max | | **Phosphorus (P)** | 0.03 max | *Note: The balanced composition provides excellent age-hardening capability through gamma prime precipitation (Ti, Al) while maintaining superior corrosion resistance in sour gas and chloride environments (Cr, Mo, Cu).* --- #### **2. Physical Properties** Alloy 925 strip exhibits consistent physical properties: | Property | Value | |:---|:---| | **Density** | 8.08 g/cm³ (0.292 lb/in³) | | **Melting Range** | 1370 - 1400°C (2500 - 2550°F) | | **Coefficient of Thermal Expansion** | 14.2 × 10⁻⁶/°C (20-100°C) | | **Thermal Conductivity** | 11.5 W/m·K (at 100°C) | | **Specific Heat** | 448 J/kg·K (at 100°C) | | **Modulus of Elasticity** | 196 GPa (28.4 × 10⁶ psi) | | **Electrical Resistivity** | 1.12 μΩ·m | | **Magnetic Permeability** | <1.005 (essentially non-magnetic) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Aged Condition):** | Property | Value | |:---|:---| | **Tensile Strength** | 930-1100 MPa (135-160 ksi) | | **Yield Strength (0.2% Offset)** | 690-860 MPa (100-125 ksi) | | **Elongation** | 15-25% | | **Hardness** | 225-285 HB | **Properties by Temper Condition:** | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |:---|:---|:---|:---| | **Annealed** | 620-760 | 240-380 | 30-40 | | **¼ Hard** | 760-900 | 550-690 | 20-30 | | **½ Hard** | 900-1030 | 760-900 | 15-22 | | **Full Hard** | 1030-1170 | 965-1100 | 8-15 | --- #### **4. Product Specifications** **Available Forms & Sizes:** - **Thickness:** 0.05mm to 3.0mm (0.002" to 0.118") - **Width:** 3mm to 600mm (0.118" to 23.6") - **Coil Weight:** Up to 5000 kg - **Temper Conditions:** Annealed, ¼ Hard, ½ Hard, Full Hard, Spring **Surface Finishes:** - **2D:** Dull cold-rolled finish - **2B:** Bright cold-rolled finish - **BA:** Bright annealed - **Polished:** Various grit finishes (180-600 grit) - **Special:** Coated or plated surfaces available --- #### **5. Product Applications** **Electronic Components:** - **Spring Contacts:** For corrosive environments - **Connector Components:** High-reliability applications - **Shielding Elements:** EMI/RFI shielding in harsh conditions - **Battery Components:** For aerospace and military use **Precision Engineering:** - **Sealing Elements:** Gaskets and seal strips - **Bellows Components:** Pressure and temperature applications - **Sensor Elements:** Corrosion-resistant sensing components - **Medical Devices:** Surgical instruments and implants **Oil & Gas Industry:** - **Instrumentation Components:** Pressure sensor diaphragms - **Control System Parts:** Valve components and actuators - **Safety Device Elements:** Relief valve and regulator parts - **Measurement Tools:** Downhole instrument components **Automotive & Aerospace:** - **Fuel System Components:** Injector parts and seals - **Actuator Parts:** Precision control elements - **Fastener Components:** Specialized clips and retainers - **Thermal Management:** Heat shield and spacer elements --- #### **6. International Standards** **Material Standards:** - **UNS N09925**: Unified Numbering System designation - **ASTM B424**: Standard for Plate, Sheet, and Strip - **ASTM B906**: Standard for General Requirements for Flat-Rolled Nickel and Nickel Alloys - **AMS 5895**: Aerospace Material Specification - **DIN 2.4852**: German Industrial Standard **Industry Specifications:** - **NACE MR0175/ISO 15156**: For sour service applications - **ASTM A480**: General Requirements for Flat-Rolled Products - **ASTM E8**: Standard Test Methods for Tension Testing - **EN 10204 3.1/3.2**: Material certification **Dimensional Tolerances (per ASTM B906):** | Thickness (mm) | Tolerance (±mm) | Width (mm) | Tolerance (±mm) | |:---|:---|:---|:---| | 0.05-0.10 | 0.008 | 3-50 | 0.10 | | 0.10-0.25 | 0.015 | 50-200 | 0.15 | | 0.25-0.50 | 0.025 | 200-400 | 0.20 | | 0.50-1.00 | 0.040 | 400-600 | 0.25 | --- #### **7. Corrosion Resistance** **Excellent Performance In:** - **Sour Gas Environments:** H₂S and CO₂ containing systems - **Chloride Solutions:** Superior stress corrosion cracking resistance - **Acidic Conditions:** Sulfuric, phosphoric, and organic acids - **Alkaline Media:** Good resistance to caustic environments - **Marine Atmospheres:** Excellent pitting and crevice corrosion resistance **Corrosion Performance Data:** - **Critical Pitting Temperature:** >85°C - **Critical Crevice Temperature:** >65°C - **NACE TM0177:** Compliant for sour service - **General Corrosion Rate:** <0.1 mm/year in most chemical environments --- #### **8. Fabrication Characteristics** **Forming Operations:** - **Blankability:** Excellent for precision blanking - **Bendability:** Minimum bend radius 1 × thickness - **Deep Drawing:** Good in annealed condition - **Stamping:** Suitable for high-speed production **Machining:** - **Machinability Rating:** 25-35% (compared to 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Parameters:** Optimized for thin strip - **Micro-machining:** Suitable for precision components **Joining Methods:** - **Resistance Welding:** Excellent for thin sections - **Laser Welding:** Precision joining capability - **Brazing:** Compatible with various filler metals - **Adhesive Bonding:** Good surface for bonding --- #### **9. Heat Treatment** **Standard Heat Treatment:** 1. **Solution Annealing:** 1095-1120°C (2000-2050°F) + rapid quench 2. **Aging Treatment:** 620-650°C (1150-1200°F) for 8-16 hours, air cool **Special Considerations for Strip:** - **Coil Annealing:** For consistent properties throughout coil - **Tension Leveling:** For superior flatness - **Surface Protection:** Controlled atmosphere annealing - **Temper Rolling:** For precise mechanical properties --- #### **10. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness, springback tests - **Surface Inspection:** Visual and microscopic examination - **Dimensional Checks:** Thickness, width, camber, flatness - **Special Testing:** Corrosion tests, micrographic examination **Quality Control Parameters:** - **Thickness Control:** ±2% for critical applications - **Width Control:** Precision slitting capabilities - **Surface Quality:** Defect-free surface requirements - **Edge Condition:** Burr-free edges specified - **Flatness:** Stringent flatness requirements --- #### **11. Key Advantages** * **Precision Tolerances:** Tight dimensional control for critical applications * **Excellent Formability:** Can be stamped, bent, and formed into complex shapes * **Superior Corrosion Resistance:** Outstanding performance in aggressive environments * **Consistent Properties:** Uniform mechanical properties throughout coil * **Age-Hardenable:** Can be heat treated for optimal properties * **Surface Quality:** Multiple finish options available * **Cost-Effective:** Efficient material usage in strip form * **Industry Compliance:** Meets major international standards Alloy 925 strip provides manufacturers with a high-precision material solution for applications requiring excellent corrosion resistance, precise dimensional control, and reliable performance in demanding industrial environments, particularly where space constraints and weight considerations are critical factors.

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 2008 gallon liquid totes Special package is available on request.