Alloy 925,Incoloy 925 Foil,Shim,UNS N09925,E FORU

British Specs:，American Specs:，German Specs:

### **Product Datasheet: Alloy 925 / Incoloy 925 Foil & Shim (UNS N09925)** **Alloy 925** (commercially known as **Incoloy 925**) foil and shim products represent the thin-gauge form of this premium precipitation-hardenable nickel-iron-chromium alloy. These precision-rolled materials are engineered for applications requiring exceptional dimensional stability, precise thickness control, and reliable performance in corrosive environments where space constraints and exacting tolerances are critical. --- #### **1. Chemical Composition** The chemical composition of Alloy 925 foil and shim is precisely controlled to ensure consistent performance in thin sections: | 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 carefully balanced composition ensures consistent age-hardening response and maintains excellent corrosion resistance characteristics even in ultra-thin sections.* --- #### **2. Physical Properties** Alloy 925 foil and shim exhibit the following 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** **Typical Mechanical Properties by Temper Condition:** | Temper Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) | |:---|:---|:---|:---|:---| | **Annealed** | 620 - 760 | 240 - 380 | 30 - 40 | 180 - 220 | | **¼ Hard** | 760 - 900 | 550 - 690 | 20 - 30 | 220 - 260 | | **½ Hard** | 900 - 1030 | 760 - 900 | 15 - 22 | 260 - 300 | | **Full Hard** | 1030 - 1170 | 965 - 1100 | 8 - 15 | 300 - 350 | | **Aged** | 1100 - 1240 | 965 - 1170 | 10 - 18 | 320 - 380 | --- #### **4. Product Specifications** **Available Forms & Dimensions:** **Foil Specifications:** - **Thickness Range:** 0.025 mm to 0.15 mm (0.001" to 0.006") - **Width Range:** 50 mm to 600 mm (2" to 24") - **Standard Tolerance:** ±0.005 mm for critical dimensions - **Surface Finish:** Bright annealed, matte, or special polished **Shim Stock Specifications:** - **Thickness Range:** 0.05 mm to 1.0 mm (0.002" to 0.040") - **Width Range:** 100 mm to 1000 mm (4" to 40") - **Standard Sheets:** 1000 mm × 2000 mm (39" × 79") - **Custom Shapes:** Pre-cut to customer specifications **Temper Conditions Available:** - Annealed (soft condition for forming) - ¼ Hard, ½ Hard, Full Hard (for spring applications) - Aged (maximum strength and corrosion resistance) --- #### **5. Product Applications** **Precision Engineering & Aerospace:** - **Turbine Engine Shims:** Critical gap management in hot sections - **Sealing Elements:** High-temperature gaskets and seals - **Spacer Shims:** Precision thickness control in assemblies - **Vibration Damping:** Thin layers in composite structures **Electronic & Electrical Applications:** - **EMI/RFI Shielding:** Corrosion-resistant electromagnetic shielding - **Battery Components:** Current collectors and interconnects - **Sensor Diaphragms:** Pressure and chemical sensor elements - **Connector Components:** High-reliability electrical contacts **Chemical Processing:** - **Gasket Materials:** For corrosive chemical service - **Liner Materials:** Thin protective layers in equipment - **Seal Components:** Pump and valve sealing elements - **Corrosion Barriers:** Protective layers in aggressive environments **Oil & Gas Industry:** - **Instrumentation Shims:** Precision measurement equipment - **Seal Rings:** Downhole and surface equipment - **Spacer Elements:** Wellhead and Christmas tree components - **Control Device Components:** Regulator and valve parts **Medical & Scientific:** - **Medical Instruments:** Surgical tool components - **Laboratory Equipment:** Corrosion-resistant fixtures - **Analytical Instrumentation:** Precision measurement components - **Implant Devices:** Non-magnetic medical components --- #### **6. International Standards** **Material Standards:** - **UNS N09925**: Unified Numbering System designation - **ASTM B424**: Standard for Plate, Sheet, and Strip - **ASTM B906**: Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys - **AMS 5895**: Aerospace Material Specification - **DIN 2.4852**: German Industrial Standard **Dimensional Standards:** - **ASTM B909**: Standard Guide for Plane Strain Fracture Toughness Testing - **ISO 9445**: Continuously cold-rolled stainless steel strip for springs - **MIL-S-22499D**: Shim Stock, Metallic, Corrosion Resistant **Quality & Testing Standards:** - **ASTM E8**: Standard Test Methods for Tension Testing - **ASTM E290**: Standard Test Methods for Bend Testing - **ASTM E345**: Standard Test Methods of Tension Testing of Metallic Foil - **ASTM G48**: Standard Test Methods for Pitting and Crevice Corrosion --- #### **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 operations - **Bendability:** Minimum bend radius 1 × thickness - **Deep Drawing:** Good formability in annealed condition - **Stamping:** Suitable for high-volume production **Joining Methods:** - **Resistance Welding:** Excellent for thin sections - **Laser Welding:** Precision joining capability - **Brazing:** Compatible with various filler metals - **Adhesive Bonding:** Good surface for structural adhesives **Heat Treatment:** - **Solution Annealing:** 1095-1120°C (2000-2050°F) + rapid quench - **Aging Treatment:** 620-650°C (1150-1200°F) for 8-16 hours - **Stress Relieving:** Available for specific applications --- #### **9. 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, flatness verification - **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 --- #### **10. Key Advantages** * **Precision Thickness Control:** Exceptional dimensional accuracy for critical applications * **Superior Corrosion Resistance:** Maintains excellent corrosion resistance in thin sections * **Excellent Formability:** Can be stamped, blanked, and formed into complex shapes * **High Strength-to-Weight Ratio:** Ideal for weight-sensitive applications * **Consistent Properties:** Uniform mechanical properties throughout the material * **Age-Hardenable:** Can be heat treated for optimal properties * **Surface Quality:** Multiple finish options available * **Industry Compliance:** Meets major international standards Alloy 925 foil and shim products provide engineers 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 2012 gallon liquid totes Special package is available on request.