Alloy 475,Nilo 475 Other/Similar Specs,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) - Other Forms & Similar Specifications** **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. Beyond standard forms, this specialized material is available in various configurations and has equivalent specifications across different international standards systems. * **UNS Designation:** **K95000** * **Alternative Names:** Nilo 475, Glass Sealing 475, 475 Alloy --- #### **1. Chemical Composition** The chemical composition remains consistent across all product forms, ensuring reliable thermal expansion properties. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 46.0 - 48.0 | Primary element controlling CTE characteristics | | **Cobalt (Co)** | 24.0 - 26.0 | Modifies thermal expansion properties | | **Iron (Fe)** | Balance | Base element of the alloy | | **Manganese (Mn)** | 0.10 - 0.30 | Enhances workability and acts as deoxidizer | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass/ceramic wetting characteristics | | **Carbon (C)** | 0.05 max | Limited to prevent embrittlement | | **Sulfur (S)** | 0.02 max | Controlled impurity | | **Phosphorus (P)** | 0.02 max | Controlled impurity | --- #### **2. Physical Properties** Consistent physical properties across all product configurations. | Property | Value / Condition | |:---|:---| | **Density** | 8.35 g/cm³ (0.302 lb/in³) | | **Melting Point** | ~1445 °C (2635 °F) | | **Curie Temperature** | ~420 °C (790 °F) | | **Thermal Expansion Coefficient** | 20-300°C: 7.8-8.5 μm/m·°C | | **Thermal Conductivity** | 14.5 W/m·K at 20°C | | **Electrical Resistivity** | 0.52 μΩ·m at 20°C | --- #### **3. Other Product Forms & Configurations** **Specialized Product Variants:** * **Pre-oxidized Material:** Supplied with controlled surface oxidation for immediate sealing * **Copper-Clad Composite:** Bimetal strips with copper coating for improved conductivity * **Plated Variants:** Available with nickel, gold, or silver plating * **Powder Form:** For metal injection molding (MIM) applications * **Custom Profiles:** Extruded or rolled to customer-specific cross-sections **Specialized Forms:** * **Fine Wire:** Down to 0.05 mm diameter for specialized applications * **Ultra-Thin Foil:** As thin as 0.012 mm for unique sealing requirements * **Precision Etched Components:** Photochemical machining for complex shapes * **Sputtering Targets:** For thin-film deposition processes --- #### **4. International Standards & Cross-References** Comprehensive list of equivalent international specifications: | Standard System | Standard Number | Equivalent Designation | |:---|:---|:---| | **UNS** | **K95000** | Primary Unified Numbering System | | **ASTM** | **ASTM F15** | Standard Specification for Iron-Nickel Sealing Alloys | | **ISO** | **ISO 9711** | Metallic materials for glass-to-metal seals | | **DIN** | **DIN 1745** | Werkstoffe für Glas-Metall-Verbindungen | | **JIS** | **JIS H 7541** | Alloys for Glass-to-Metal Seals | | **GB** | **GB/T 15008** | Chinese National Standard | | **BS** | **BS 3728** | British Standard for Glass Sealing Alloys | --- #### **5. Industry-Specific Specifications** **Aerospace & Defense:** * AMS 7724: Aerospace Material Specification * MIL-DTL-23488: Military Specification for Sealing Alloys * GE Specification: S-400 (Internal) * Rolls-Royce: RRES 900.310 **Electronics & Electrical:** * IEC 60404-8-6: International Electrotechnical Commission * EIA 486: Electronic Industries Alliance * SEMI Specification: Semiconductor Equipment Manufacturers **Nuclear Applications:** * ASTM F15 with Nuclear Addendum * RCC-MRx: Nuclear Reactor Component Design * ASME Section III: Nuclear Facility Components --- #### **6. Similar & Alternative Alloys** **Direct Equivalents:** * **NILO® 475:** Carpenter Technology trade name * **Vacoseal 475:** VACUUMSCHMELZE designation * **Glass Sealing 475:** Generic industry designation **Related Sealing Alloys:** * **Alloy 52** (UNS N14052): 52% Nickel - for hard glasses * **Alloy 48** (UNS K94800): 48% Nickel - for different applications * **Alloy 42** (UNS K94100): 42% Nickel - for ceramics **Comparison with Key Alloys:** | Property | Alloy 475 | Alloy 52 | Alloy 42 | |:---|:---|:---|:---| | **Nickel Content** | 47% | 52% | 42% | | **Cobalt Content** | 25% | 0% | 0% | | **CTE (20-300°C)** | 7.8-8.5 μm/m·°C | 9.8-10.5 μm/m·°C | 4.5-5.5 μm/m·°C | | **Primary Application** | Special Glasses/Ceramics | Hard Glasses | Ceramics | | **Curie Temperature** | ~420°C | ~500°C | ~360°C | --- #### **7. Special Applications & Custom Specifications** **Customized Variants Include:** * Modified silicon content for specific material types * Controlled grain size variants for special forming requirements * Ultra-low gas content grades for high-vacuum applications * High-purity versions for nuclear and medical applications * Special surface finish grades for direct sealing applications **Emerging Applications:** * **Additive Manufacturing:** Powder bed fusion applications * **Micro-electromechanical Systems (MEMS):** Precision components * **Quantum Computing:** Cryogenic application components * **Advanced Packaging:** Specialized integration applications --- #### **8. Global Supply Chain Considerations** **Major Producers:** * Carpenter Technology (USA) * Vacuumschmelze (Germany) * Hitachi Metals (Japan) * Aperam (Europe) * Special Metals Corporation (USA) **Quality Certifications:** * ISO 9001:2015 Quality Management * AS9100 Aerospace Quality * NADCAP Special Process Accreditation * ISO/IEC 17025 Testing Laboratory Accreditation --- **Summary** **Alloy 475 (Nilo 475, UNS K95000)** demonstrates specialized versatility across multiple international standards and unique applications. The material's consistent chemical and physical properties, enhanced by cobalt content, ensure reliable performance whether specified under ASTM, ISO, DIN, JIS, or other major standards systems. Understanding the cross-equivalency between different international specifications allows for global sourcing and manufacturing flexibility while maintaining the unique thermal expansion properties that make Alloy 475 essential for specialized sealing applications. The availability of specialized forms enables engineers to select optimal configurations for specific design requirements in aerospace, advanced electronics, medical, and specialized industrial sectors. The material's compatibility with emerging manufacturing technologies ensures its continued relevance in advanced applications requiring unique thermal expansion control and reliable sealing performance with special glasses and certain ceramics.

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 2531 gallon liquid totes Special package is available on request.