Alloy 42,Nilo 42 Rod,UNS K94100,E FORU

British Specs:，American Specs: ASTM F30 ASTM B 753 AMS 5683 Welding Wire，German Specs: WS 1.3917,DIN 17745 AFNOR NF A54-301

**Product Datasheet: Alloy 42 / Nilo 42 Rod (UNS K94100)** ### **1. Overview** Alloy 42 (commercially known as **Nilo 42**) is a **nickel-iron alloy** with approximately **42% nickel**, designed to exhibit a **thermal expansion coefficient** closely matching that of **borosilicate glass, alumina, and certain ceramics**. The rod form of Alloy 42 is widely used in applications requiring machined components with stable dimensions under temperature variations. It is ideal for **electronic, aerospace, and industrial components** requiring hermetic sealing or thermal compatibility. The alloy is registered under the Unified Numbering System as **UNS K94100**. --- ### **2. Chemical Composition (Weight %)** | Element | Alloy 42 / Nilo 42 Rod (Standard) | |------------------|-----------------------------------| | **Nickel (Ni)** | 41.0 – 42.5% | | **Iron (Fe)** | Balance | | **Manganese (Mn)**| 0.50 – 0.80% | | **Silicon (Si)** | 0.15 – 0.30% | | **Carbon (C)** | ≤ 0.05% | | **Chromium (Cr)**| ≤ 0.15% | | **Copper (Cu)** | ≤ 0.05% | | **Aluminum (Al)**| ≤ 0.05% | | **Sulfur (S)** | ≤ 0.015% | | **Phosphorus (P)**| ≤ 0.015% | --- ### **3. Physical & Mechanical Properties** | Property | Typical Value | Condition | |---------------------------------|----------------------------------|-------------------| | **Coefficient of Thermal Expansion** | 4.5 – 5.5 × 10⁻⁶/°C (20–300°C) | Annealed | | **Density** | 8.11 g/cm³ | – | | **Melting Point** | 1420 – 1450°C | – | | **Tensile Strength** | 520 – 620 MPa | Annealed | | **Yield Strength (0.2% Offset)**| 280 – 380 MPa | Annealed | | **Elongation (in 2")** | 30 – 40% | Annealed | | **Modulus of Elasticity** | 145 GPa | – | | **Hardness (Rockwell B)** | 65 – 80 HRB | Annealed | | **Electrical Resistivity** | 0.75 μΩ·m | at 20°C | | **Thermal Conductivity** | 14.5 W/m·K | at 20°C | | **Curie Temperature** | 360°C | – | --- ### **4. International Standards & Equivalents** | Standard Type | Designation | |-------------------------|-------------------------------| | **UNS** | K94100 | | **ASTM** | F30 (Alloy 42) | | **EN (European)** | Ni42Fe (1.3917) | | **ISO** | NiFe42 | | **JIS** | C42N | | **GB (China)** | 4J42 | | **DIN** | Ni42 | --- ### **5. Product Applications** #### 5.1 Electronics & Semiconductor - **Lead frames** and structural components in IC packaging - **Machined pins and connectors** for glass-to-metal seals - **Semiconductor tooling and fixtures** #### 5.2 Industrial & Automotive - **Sensor housings** and mounting rods - **Thermal management components** - **Precision shafts and spacers** in automotive control systems #### 5.3 Aerospace & Defense - **Hermetic seal rods** for avionics and communication devices - **Support structures** in optical and laser systems - **Guidance and instrumentation components** #### 5.4 Consumer & Telecommunications - **Relay and switch components** - **Waveguide and antenna supports** - **Precision bolts and fasteners** for thermal-stable assemblies --- ### **6. Available Rod Specifications** - **Diameter Range**: 3 mm to 150 mm - **Length**: Standard 3-4 meters, custom lengths available - **Surface Finish**: Cold-drawn, turned, ground, or polished - **Tolerance**: ISO h7/h8 or per customer requirements --- ### **7. Key Features & Benefits** - **Excellent thermal expansion match** with glass and ceramics for hermetic sealing - **Good machinability** for precision components - **High strength and ductility** in annealed condition - **Corrosion resistance** in typical service environments - **Suitable for plating and coating** (e.g., nickel, gold, silver) --- ### **8. Quality Assurance & Certification** - Certified material test reports per **EN 10204 3.1/3.2** - Full traceability from melt to final product - Compliance with **ASTM, EN, JIS, and GB** standards --- **Note:** For optimal performance in glass or ceramic sealing applications, proper heat treatment and machining practices are recommended. Contact our technical team for specific application guidance and processing recommendations.

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 2444 gallon liquid totes Special package is available on request.