Nickel 52/Iron 48 Alloy,Nickel Iron Alloy,Ni48Fe Alloy,E FORU

### **Nickel 52/Iron 48 Alloy (Ni48Fe) - Controlled Expansion Nickel-Iron Alloy** #### **Overview** **Nickel 52/Iron 48 Alloy** (commonly referred to as Ni48Fe or 48% Nickel-Iron Alloy) is a precision engineered controlled expansion alloy designed to provide specific thermal expansion characteristics between those of low-expansion Invar (36% Ni) and higher expansion alloys. This composition offers an optimal balance of thermal expansion control, good thermal conductivity, and excellent soft magnetic properties, making it suitable for applications requiring precise dimensional stability under varying temperature conditions while maintaining good magnetic performance. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **51.0-53.0%** | Controls thermal expansion coefficient | | **Iron (Fe)** | **Balance (~47-49%)** | Base element providing magnetic properties | | **Manganese (Mn)** | **0.30-0.60%** | Deoxidizer and sulfur control | | **Silicon (Si)** | **0.10-0.30%** | Deoxidizer and impurity control | | **Carbon (C)** | **≤ 0.03%** | Minimized for magnetic properties | | **Cobalt (Co)** | **≤ 0.50%** | Controlled impurity | | **Copper (Cu)** | **≤ 0.20%** | Controlled impurity | | **Sulfur (S)** | **≤ 0.010%** | Strictly controlled | --- #### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **8.25 g/cm³** | | **Melting Point** | **1420-1450°C** (2588-2642°F) | | **Mean Coefficient of Thermal Expansion** | **~8.5-9.5 × 10⁻⁶/°C** (20-300°C) | | **Thermal Conductivity** | **18-22 W/m·K** (at 20°C) | | **Electrical Resistivity** | **40-45 μΩ·cm** | | **Curie Temperature** | **~440°C** (824°F) | | **Specific Heat Capacity** | **500 J/kg·K** | | **Tensile Strength** | **480-580 MPa** | | **Yield Strength (0.2% Offset)** | **280-350 MPa** | | **Elongation** | **30-40%** | | **Modulus of Elasticity** | **155-165 GPa** | | **Hardness** | **140-170 HV** | | **Saturation Induction** | **1.5-1.6 T** | --- #### **Magnetic Properties** | Property | Value | |----------|-------| | **Initial Permeability** | **2,000-4,000** | | **Maximum Permeability** | **30,000-50,000** | | **Coercive Force** | **8-12 A/m** | | **Residual Induction** | **0.8-1.0 T** | | **Hysteresis Loss** | **Low** | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **Controlled Thermal Expansion**: Intermediate CTE between Invar and stainless steels - **Excellent Soft Magnetic Properties**: High permeability with low coercivity - **Good Thermal Conductivity**: Better heat dissipation than higher nickel alloys - **Matched Expansion**: Compatible with various glasses and ceramics - **Good Corrosion Resistance**: Superior to carbon steels - **Excellent Fabricability**: Can be machined, welded, and formed **Typical Applications:** - **Electronics Packaging**: Lead frames, semiconductor packages - **Magnetic Components**: Transformer cores, magnetic shields - **Precision Instruments**: Optical mounts, measuring equipment - **Aerospace Systems**: Gyroscopes, navigation instruments - **Telecommunications**: Waveguide components, RF packages - **Medical Devices**: MRI components, surgical instruments - **Automotive Sensors**: Position sensors, control systems --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **ASTM** | **F30** | Iron-nickel sealing alloys | | **IEC** | **60404-8-6** | Soft magnetic metallic materials | | **MIL** | **N-14411C** | Military specification (Composition 4) | | **DIN** | **17745** | German standard for Ni48Fe alloys | | **JIS** | **C2531** | Japanese industrial standard | | **UNS** | **K94810** | Unified Numbering System | --- #### **Manufacturing & Processing** **Available Forms:** - **Strip & Foil**: 0.05 mm to 3.0 mm thickness - **Wire**: 0.1 mm to 6.0 mm diameter - **Rod & Bar**: 3 mm to 100 mm diameter - **Plate**: 3 mm to 50 mm thickness - **Custom Shapes**: Forgings and machined components **Processing Guidelines:** - **Annealing Temperature**: 850-950°C in hydrogen or vacuum - **Hot Working**: 1100-1200°C - **Cold Working**: Good capability with intermediate anneals - **Machinability**: Similar to austenitic stainless steels - **Welding**: TIG, laser, and electron beam methods recommended --- #### **Quality Control & Testing** - **Chemical Analysis**: Per ASTM E1473 - **Thermal Expansion**: Per ASTM E228 - **Magnetic Testing**: Per ASTM A342 - **Mechanical Testing**: Per ASTM E8/E8M - **Dimensional Inspection**: Per applicable product standards --- #### **Summary** **Nickel 52/Iron 48 Alloy** represents a strategically important material in the family of controlled expansion nickel-iron alloys, offering a unique combination of intermediate thermal expansion characteristics and excellent soft magnetic properties. Its ability to maintain dimensional stability while providing good magnetic performance makes it invaluable for precision applications in electronics, telecommunications, and instrumentation industries. The alloy's well-balanced properties, comprehensive standardization, and proven reliability in critical applications ensure its continued importance in advanced technological systems where precise control of thermal expansion and magnetic characteristics are essential for optimal performance and long-term reliability.

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 3221 gallon liquid totes Special package is available on request.