Alloy 52,Glass sealing 52 Alloy Other/Similar Specs,UNS N14052,E FORU

British Specs:，American Specs: ASTM F30，German Specs:

### **Alloy 52 (Glass Sealing 52) - Other Forms & Similar Specifications** **Alloy 52** is a nickel-iron controlled expansion alloy specifically engineered for matched sealing with specific borosilicate hard glasses. Beyond standard forms, this versatile material is available in various specialized configurations and has equivalent specifications across different international standards systems. * **UNS Designation:** **N14052** * **Alternative Names:** Glass Sealing 52, 52Ni-Fe Alloy, ASTM F15 Alloy 52 --- #### **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)** | 51.0 - 52.5 | Primary element controlling CTE and Curie point | | **Iron (Fe)** | Balance | Base element of the alloy | | **Manganese (Mn)** | 0.10 - 0.30 | Deoxidizer and hot workability enhancer | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass wetting and oxidation resistance | | **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** | 8.25 g/cm³ (0.298 lb/in³) | | **Melting Point** | ~1435 °C (2615 °F) | | **Curie Temperature** | ~500 °C (930 °F) | | **Thermal Expansion Coefficient** | 20-300°C: 9.8-10.5 μm/m·°C | | **Thermal Conductivity** | 15.5 W/m·K at 20°C | | **Electrical Resistivity** | 0.47 μΩ·m at 20°C | --- #### **3. Other Product Forms & Configurations** **Specialized Product Variants:** * **Pre-oxidized Material:** Supplied with controlled surface oxidation for immediate glass sealing * **Copper-Clad Composite:** Bimetal strips with copper coating for improved conductivity * **Plated Variants:** Available with nickel, gold, or silver plating for specific applications * **Powder Form:** For metal injection molding (MIM) and additive manufacturing * **Laminated Composites:** Multi-layer structures for specialized thermal management * **Custom Profiles:** Extruded or rolled to customer-specific cross-sections **Specialized Forms:** * **Fine Wire:** Down to 0.05 mm diameter for micro-electronic applications * **Ultra-Thin Foil:** As thin as 0.012 mm for specialized sealing applications * **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** | **N14052** | 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 | | **AFNOR** | **NF A54-302** | French Standard | --- #### **5. Industry-Specific Specifications** **Aerospace & Defense:** * AMS 7723: 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® 52:** Carpenter Technology trade name * **Vacoseal 52:** VACUUMSCHMELZE designation * **Glass Sealing 52:** Generic industry designation **Related Sealing Alloys:** * **Alloy 48** (UNS K94800): 48% Nickel - for different hard glasses * **Alloy 46** (UNS K94600): 46% Nickel - for soft glasses * **Alloy 42** (UNS K94100): 42% Nickel - for specific hard glasses **Comparison with Key Alloys:** | Property | Alloy 52 | Alloy 48 | Alloy 46 | |:---|:---|:---|:---| | **Nickel Content** | 52% | 48% | 46% | | **CTE (20-300°C)** | 9.8-10.5 μm/m·°C | 8.5-9.2 μm/m·°C | 9.2-9.8 μm/m·°C | | **Primary Glass Match** | Specific Hard Glasses | Hard Glasses | Soft Glasses | | **Curie Temperature** | ~500°C | ~480°C | ~430°C | --- #### **7. Special Applications & Custom Specifications** **Customized Variants Include:** * Modified silicon content for specific glass 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-to-glass sealing **Emerging Applications:** * **Additive Manufacturing:** Powder bed fusion and binder jetting * **Micro-electromechanical Systems (MEMS):** Precision components * **Quantum Computing:** Cryogenic application components * **Advanced Packaging:** Heterogeneous 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 52 (Glass Sealing 52, UNS N14052)** demonstrates exceptional versatility across multiple international standards and specialized applications. The material's consistent chemical and physical properties 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 critical thermal expansion properties that make Alloy 52 indispensable for reliable hard glass-to-metal sealing applications. The availability of specialized forms - including pre-oxidized, plated, composite, and powder variants - enables engineers to select the optimal configuration for specific design requirements in aerospace, electronics, medical, and industrial sectors. The material's compatibility with emerging manufacturing technologies ensures its continued relevance in advanced applications requiring precise thermal expansion control and reliable sealing performance with specific borosilicate hard glasses.

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 2518 gallon liquid totes Special package is available on request.