Alloy 42,Nilo 42 Plate,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 PLATE** **UNS K94100 - Plate Product** --- ### **1. OVERVIEW** Alloy 42 (commercially known as **Nilo 42**) is a **nickel-iron alloy** containing approximately **42% nickel**, specifically engineered to exhibit a **thermal expansion coefficient** that closely matches **borosilicate glass, alumina ceramics, and various semiconductor materials**. Supplied in **plate form**, this material provides exceptional dimensional stability and thermal compatibility for applications requiring flat, stable surfaces and structural components. The alloy is registered under the Unified Numbering System as **UNS K94100**. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 42 / Nilo 42 Plate | UNS K94100 Requirements | |------------------|--------------------------|-------------------------| | **Nickel (Ni)** | 41.0 – 42.5% | 41.0 – 42.5% | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)**| 0.50 – 0.80% | ≤ 0.80% | | **Silicon (Si)** | 0.15 – 0.30% | ≤ 0.30% | | **Carbon (C)** | ≤ 0.05% | ≤ 0.05% | | **Chromium (Cr)**| ≤ 0.15% | ≤ 0.15% | | **Copper (Cu)** | ≤ 0.05% | ≤ 0.05% | | **Aluminum (Al)**| ≤ 0.05% | ≤ 0.05% | | **Sulfur (S)** | ≤ 0.015% | ≤ 0.015% | | **Phosphorus (P)**| ≤ 0.015% | ≤ 0.015% | --- ### **3. PHYSICAL & MECHANICAL PROPERTIES** | Property | Typical Value (Annealed) | Condition | |---------------------------------|--------------------------|-------------------------| | **CTE (20–300°C)** | 4.5 – 5.5 × 10⁻⁶/°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 frame substrates** for integrated circuits - **Semiconductor packaging** bases - **Microelectronic mounting** plates - **Power device** heat spreaders #### **5.2 Glass & Ceramic Sealing** - **Hermetic seal** base plates - **Glass-to-metal seal** components - **Ceramic package** mounting plates - **Optical component** mounting platforms #### **5.3 Automotive & Aerospace** - **Sensor mounting** plates - **Electronic control unit** bases - **Avionics equipment** platforms - **Instrument panel** structural components #### **5.4 Industrial Applications** - **Precision measurement** equipment bases - **Laser system** mounting plates - **Optical table** surfaces - **Laboratory instrument** platforms --- ### **6. PLATE SPECIFICATIONS** #### **Standard Plate** - **Thickness**: 3.0 mm to 50 mm - **Width**: 500 mm to 1500 mm - **Length**: 1000 mm to 3000 mm - **Surface Finish**: Hot-rolled, annealed, and pickled #### **Precision Plate** - **Thickness**: 1.0 mm to 20 mm - **Width**: 300 mm to 1000 mm - **Length**: 1000 mm to 2000 mm - **Surface Finish**: Cold-rolled, annealed, and skin-passed #### **Machined Plate** - **Thickness Tolerance**: ±0.1 mm - **Flatness**: ≤ 0.5 mm/m - **Surface Roughness**: Ra ≤ 1.6 μm --- ### **7. KEY FEATURES & BENEFITS** - **Excellent thermal expansion match** with glass and ceramics - **Superior dimensional stability** under thermal cycling - **Good machinability** and formability - **High strength-to-weight ratio** - **Excellent weldability** using standard methods - **Good corrosion resistance** in typical environments - **Magnetic properties** suitable for electronic applications --- ### **8. PROCESSING & FABRICATION** #### **Machining** - Suitable for milling, drilling, turning, and grinding - Recommended tools: Carbide or high-speed steel - Cutting speeds: Moderate with adequate cooling #### **Welding** - **TIG Welding**: Recommended method - **MIG Welding**: Suitable for thicker sections - **Resistance Welding**: Applicable for sheet materials - **Filler Material**: Matching composition recommended #### **Heat Treatment** - **Annealing**: 750-850°C followed by rapid cooling - **Stress Relieving**: 500-600°C for 1-2 hours - **Surface Treatment**: Suitable for plating and coating --- ### **9. QUALITY ASSURANCE** - **Certification**: Mill test reports per EN 10204 3.1/3.2 - **Chemical Analysis**: Verified by spectrometer - **Mechanical Testing**: Tensile and hardness testing - **Dimensional Inspection**: Verified against customer specifications - **Surface Quality**: Visual inspection per ASTM A480 - **Traceability**: Full material history maintained --- ### **10. PACKAGING & HANDLING** - **Protection**: Waterproof wrapping with desiccant - **Separation**: Protective interleaving between plates - **Identification**: Clear marking with heat number and dimensions - **Storage**: Indoor, dry environment recommended - **Handling**: Use appropriate lifting equipment to prevent damage --- **Note:** For applications requiring specific thermal expansion characteristics or mechanical properties, contact our technical team for customized heat treatment recommendations and processing guidance. Special sizes and tolerances available upon request.

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 2448 gallon liquid totes Special package is available on request.