Alloy 475,Nilo 475 Strip,UNS K95000,E FORU

British Specs:，American Specs:AMS 7718 Bar, Tube and Forgings MIL-N-14411 Comp 3，German Specs:

### **Alloy 475 (Nilo 475) - Strip Product Overview** **Alloy 475**, commercially known as **Nilo 475**, is a nickel-iron-cobalt controlled expansion alloy specifically engineered for matched sealing with special hard glasses and certain ceramic materials. The **Strip** form provides precision thin, narrow material with exact dimensional control for manufacturing components requiring unique thermal expansion compatibility. * **UNS Designation:** **K95000** * **Common Names:** Nilo 475 Strip, Glass Sealing 475 Strip --- #### **1. Chemical Composition** Precisely controlled chemistry ensures consistent thermal expansion properties in strip form. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 46.0 - 48.0 | Controls CTE characteristics | | **Cobalt (Co)** | 24.0 - 26.0 | Modifies thermal expansion properties | | **Iron (Fe)** | Balance | Base structural element | | **Manganese (Mn)** | 0.10 - 0.30 | Enhances strip rolling characteristics | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass/ceramic wetting performance | | **Carbon (C)** | 0.05 max | Limited for optimal stamping performance | | **Sulfur (S)** | 0.02 max | Controlled impurity | | **Phosphorus (P)** | 0.02 max | Controlled impurity | --- #### **2. Physical Properties** Specialized properties optimized for strip applications and special material sealing. | Property | Value / Condition | Notes | |:---|:---|:---| | **Density** | 8.35 g/cm³ (0.302 lb/in³) | Higher due to cobalt content | | **Melting Point** | ~1445 °C (2635 °F) | | | **Thermal Expansion Coefficient** | 20-300°C: 7.8-8.5 μm/m·°C
20-400°C: 8.2-9.0 μm/m·°C | Unique CTE for special applications | | **Curie Temperature** | ~420 °C (790 °F) | Modified by cobalt addition | | **Thermal Conductivity** | 14.5 W/m·K at 20°C | | | **Electrical Resistivity** | 0.52 μΩ·m at 20°C | | | **Specific Heat** | 0.45 J/g·°C at 20°C | | --- #### **3. Mechanical Properties** Properties vary with thickness and temper condition. | Property | Annealed | Quarter Hard | Half Hard | Full Hard | |:---|:---|:---|:---|:---| | **Tensile Strength (MPa)** | 520-590 | 620-720 | 720-830 | 830-980 | | **Yield Strength (MPa)** | 280-350 | 520-620 | 620-750 | 750-900 | | **Elongation (%)** | 25-35 | 12-20 | 8-15 | 4-10 | | **Hardness (HV)** | 140-170 | 180-220 | 220-260 | 260-320 | --- #### **4. Product Specifications & Applications** **Strip Specifications:** * **Thickness Range:** 0.05 mm to 2.0 mm * **Width Range:** 2.0 mm to 300 mm * **Length:** Coils up to 2000 meters * **Thickness Tolerance:** ±3% standard, ±2% available * **Width Tolerance:** ±0.05 mm standard * **Surface Finish:** 0.4 μm Ra standard, 0.2 μm Ra available **Temper Conditions:** * **Annealed (O):** Good formability * **Quarter Hard (1/4H):** Balanced formability and strength * **Half Hard (1/2H):** Moderate formability, higher strength * **Full Hard (H):** Maximum strength, spring properties **Primary Applications:** **Electronics & Electrical:** * **Special Lead Frames:** Precision-stamped frames for unique semiconductor packages * **Electronic Package Components:** Lids, bases for special glass systems * **Connector Components:** Precision contacts for specialized applications * **Sensor Elements:** Thin-film substrates for unique sensing applications **Industrial & Scientific:** * **Special Sealing Ribbons:** Narrow seals for unique glass systems * **Optical Component Frames:** Precision mounts for advanced optical systems * **Instrumentation Parts:** Small components for specialized scientific instruments * **Medical Device Components:** Precision parts for advanced medical equipment **Aerospace & Defense:** * **Special Automotive Sensors:** Components for advanced engine management * **Aerospace Electronics:** Critical components for specialized avionics * **Satellite Components:** Precision parts for advanced space applications --- #### **5. International Standards** Comprehensive international specifications for strip products. | Standard Type | Standard Number | Title / Specification | |:---|:---|:---| | **ASTM** | **ASTM F15** | Standard Specification for Iron-Nickel Sealing Alloys | | **UNS** | **K95000** | Unified Numbering System Designation | | **AMS** | AMS 7724 | Aerospace Material Specification | | **ASTM** | ASTM B48 | Standard Specification for Nickel Alloy Strip | | **DIN** | DIN 1745 | Metallic Materials for Glass-to-Metal Seals | | **ISO** | ISO 9711 | Metallic Materials for Glass-to-Metal Seals | --- #### **6. Manufacturing & Processing** **Stamping & Forming:** * **Blank Size:** Up to 300 mm width in coil form * **Progressive Die Capability:** Good for production operations * **Minimum Bend Radius:** 1.5x thickness (annealed), 2.5x thickness (hard) * **Tooling Clearance:** 6-9% of material thickness recommended **Surface Treatments:** * **Copper Plating:** 0.5-2.0 μm for improved solderability * **Nickel Plating:** For high-temperature applications * **Pre-oxidation:** Controlled surface for immediate glass sealing * **Special Coatings:** For ceramic sealing applications **Quality Control:** * **Dimensional Control:** Laser measurement for thickness and width * **Surface Inspection:** Automated surface defect detection * **Edge Quality:** Controlled slit edge condition * **Mechanical Testing:** Regular tensile and hardness verification --- #### **7. Special Features** **Precision Attributes:** * **Dimensional Stability:** Good for precision component manufacturing * **Surface Quality:** Suitable for critical sealing applications * **Consistency:** Batch-to-batch consistency for production * **Formability:** Adaptable to various manufacturing processes **Processing Guidelines:** * **Storage:** Dry, controlled environment recommended * **Handling:** Proper coil handling to prevent edge damage * **Slitting:** Precision slitting to tight width tolerances * **Annealing:** Continuous annealing available for coil products --- **Summary** **Alloy 475 (Nilo 475) Strip (UNS K95000)** represents a specialized form of this unique sealing alloy with cobalt content, offering good dimensional control and consistent performance for components requiring special thermal expansion characteristics. Its carefully engineered thermal expansion properties, combined with adequate stamping characteristics and surface quality, make it suitable for specialized electronics manufacturing, particularly in semiconductor packaging, precision connectors, and micro-electronic components requiring matching with special glasses or ceramics. The strip form enables production of complex components through progressive die stamping while maintaining unique thermal expansion matching. Compliance with **ASTM F15** and other international standards ensures material quality and performance consistency for production of reliable seals in specialized electronic applications.

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 2528 gallon liquid totes Special package is available on request.