Alloy 48 Plate – FeNi48 Controlled Expansion Alloy Plate
Product Short Description
Alloy 48 Plate, also known as FeNi48 Controlled Expansion Alloy Plate, is a nickel-iron precision alloy designed for applications requiring stable thermal expansion behavior and reliable dimensional control. With approximately 48% nickel content, Alloy 48 provides controlled expansion performance and is widely used in glass-to-metal sealing, ceramic sealing, electronic components, vacuum devices, precision instruments and optical equipment.
SASA ALLOY supplies Alloy 48 plates in customized thickness, width, length and surface condition according to customer requirements. Products can be supplied with chemical composition analysis, mechanical testing, dimensional inspection, PMI testing, surface inspection, EN 10204 3.1 material certificate and full heat number traceability.
- Product Name: Alloy 48 Plate
- Material Grade: Alloy 48 / FeNi48 / 48Ni-Fe
- Product Type: Nickel-Iron Controlled Expansion Alloy Plate
- Main Feature: Controlled thermal expansion and stable dimensional performance
- Applications: Glass sealing, ceramic sealing, electronic components, vacuum devices and precision instruments
Product Parameters
| Item | Specification |
|---|---|
| Product Name | Alloy 48 Plate |
| Material Grade | Alloy 48 / FeNi48 / 48Ni-Fe |
| Material Type | Nickel-Iron Controlled Expansion Alloy |
| Product Form | Plate, Sheet, Strip, Flat Bar, Cut Plate, Machined Plate |
| Thickness | 0.5 mm – 100 mm or customized |
| Width | 100 mm – 2000 mm or customized |
| Length | 500 mm – 6000 mm or cut to size |
| Surface Condition | Hot Rolled, Cold Rolled, Pickled, Polished, Ground, Machined |
| Standard | ASTM, UNS, EN, DIN, JIS, GB or customer specification |
| Inspection | Chemical Analysis, Mechanical Test, PMI Test, Dimensional Inspection, Surface Inspection |
| Certificate | EN 10204 3.1 Material Certificate available |
| Processing Service | Cutting, Shearing, Grinding, CNC Machining, Custom Size Processing |
Chemical Composition
The chemical composition of Alloy 48 Plate is controlled to provide stable thermal expansion performance and reliable sealing behavior. The following values are for general reference only. Final composition should be confirmed according to the applicable standard, purchase order and mill test certificate.
| Element | Ni | Fe | C | Mn | Si | P | S | Co | Cu | Cr |
|---|---|---|---|---|---|---|---|---|---|---|
| Content % | 47.0 – 49.0 | Balance | ≤0.05 | ≤0.80 | ≤0.30 | ≤0.020 | ≤0.020 | ≤0.50 | ≤0.30 | ≤0.25 |
Mechanical Properties
Mechanical properties of Alloy 48 Plate may vary depending on thickness, production process, heat treatment condition and final application requirements. SASA ALLOY can provide test reports according to customer specifications.
| Condition | Tensile Strength | Yield Strength | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Annealed / Typical | 450 – 650 MPa | 240 – 350 MPa | 25% min | According to condition | Approx. 8.1 g/cm³ |
| Cold Worked / Custom | According to order | According to order | According to order | According to order | Approx. 8.1 g/cm³ |
Note: For controlled expansion alloy applications, thermal expansion behavior, dimensional stability and surface quality are often more important than conventional strength values.
Common Size Table
| Thickness | Width | Length | Surface | Availability |
|---|---|---|---|---|
| 0.5 – 3.0 mm | 100 – 1000 mm | 500 – 3000 mm | Cold Rolled / Pickled | Stock / Production |
| 3.0 – 10 mm | 300 – 1500 mm | 1000 – 4000 mm | Hot Rolled / Pickled | Stock / Production |
| 10 – 30 mm | 500 – 2000 mm | 1000 – 6000 mm | Hot Rolled / Ground | Production |
| 30 – 100 mm | According to order | According to order | Machined / Ground | Made to Order |
Different Specifications Comparison
| Type | Thickness Range | Surface Condition | Typical Use |
|---|---|---|---|
| Alloy 48 Sheet | 0.5 – 6 mm | Cold Rolled / Pickled / Polished | Electronic parts, sealing components, relay parts and precision small parts |
| Alloy 48 Plate | 6 – 100 mm | Hot Rolled / Ground / Machined | Optical devices, vacuum equipment, fixtures and precision tooling |
| Alloy 48 Cut Plate | Customized | Cut / Ground / Machined | Custom machining blanks and precision components |
| Alloy 48 Precision Plate | According to drawing | Ground / CNC Machined | Hermetic sealing assemblies, optical and electronic components |
Equivalent Standards and International Names
Alloy 48 Plate is known by different names in international markets. Customers may search for Alloy 48, FeNi48, 48Ni-Fe alloy plate or controlled expansion alloy plate.
| Country / Standard | Common Name | Equivalent Grade |
|---|---|---|
| Commercial Name | Alloy 48 | Nickel-Iron Controlled Expansion Alloy |
| Fe-Ni System | FeNi48 | 48Ni-Fe Alloy |
| Application Name | Glass Sealing Alloy | Controlled Expansion Alloy |
| China / GB Reference | 4J48 | FeNi48 Equivalent |
| Industrial Name | Low Expansion Alloy | Precision Alloy Material |
Production Process Flow
The production process of Alloy 48 Plate requires strict control of chemical composition, melting quality, rolling condition, heat treatment and dimensional accuracy to ensure stable controlled expansion performance.
| Process Step | Description | Quality Control Point |
|---|---|---|
| Raw Material Selection | Select qualified nickel and iron raw materials | Raw material certificate and traceability |
| Melting | Control alloy composition and impurity elements | Chemical composition analysis |
| Rolling | Hot rolling or cold rolling according to thickness | Thickness, flatness and surface control |
| Annealing | Heat treatment to improve structure and stability | Temperature and holding time control |
| Inspection | Final inspection before shipment | Dimension, surface, PMI, certificate review |
Product Inspection
1. Chemical Composition Inspection
Chemical composition analysis is performed to verify nickel content and impurity control. For Alloy 48 Plate, stable nickel-iron composition is important for controlled expansion performance and material consistency.
2. Mechanical Properties Testing
Tensile strength, yield strength, elongation and hardness can be tested according to customer requirements. Mechanical testing helps confirm material reliability for precision industrial applications.
3. Dimensional Inspection
Thickness, width, length, flatness and tolerance are inspected before shipment to ensure that the Alloy 48 Plate meets the purchase order or drawing requirements.
4. PMI Testing and Traceability
PMI testing can be used to verify material grade and prevent material mix-up. Heat number traceability and EN 10204 3.1 material certificate can be supplied with the shipment.
Product Packaging
SASA ALLOY provides export-grade packaging for Alloy 48 plates to protect the material during sea, air and land transportation.
- Protective Film: Applied to polished or machined surfaces to reduce scratches.
- Waterproof Wrapping: Used to protect plates from moisture during transport.
- Wooden Case Packaging: Suitable for cut plates and precision machined plates.
- Pallet Packing: Suitable for heavy plates and batch shipments.
- Clear Marking: Grade, heat number, size, quantity and customer PO number can be marked on labels.
Applications
Alloy 48 Plate is widely used where controlled thermal expansion and reliable dimensional stability are required. It is especially suitable for glass-to-metal sealing, ceramic sealing and precision electronic applications.
| Industry | Typical Applications | Why Alloy 48 Is Used |
|---|---|---|
| Electronics | Connectors, electronic packaging parts, relay components | Controlled expansion and stable sealing performance |
| Glass Sealing | Glass-to-metal sealing components, electronic tubes, vacuum devices | Thermal expansion compatible with selected glass materials |
| Ceramic Sealing | Ceramic-to-metal sealing parts and precision assemblies | Stable dimensional control and reliable sealing performance |
| Optical Equipment | Optical frames, laser parts, precision holders | Maintains shape under temperature changes |
| Precision Instruments | Measuring devices, reference components, support plates | Controlled expansion and reliable dimensional stability |
Why Choose SASA ALLOY?
- Professional supplier of Alloy 48 / FeNi48 controlled expansion alloy plate
- Customized thickness, width, length and cut-to-size service available
- Support for ASTM, UNS, EN, DIN, JIS, GB and customer specifications
- Material traceability with heat number control
- EN 10204 3.1 material certificate available
- Chemical analysis, mechanical testing, PMI testing and dimensional inspection support
- Export packaging suitable for international transportation
- Suitable for glass sealing, ceramic sealing, electronic components, vacuum devices and precision instrument applications
FAQ
What is Alloy 48 Plate?
Alloy 48 Plate is a nickel-iron controlled expansion alloy plate containing approximately 48% nickel. It is commonly used for glass-to-metal sealing, ceramic sealing, electronic components and precision parts.
Is Alloy 48 the same as FeNi48?
Yes. Alloy 48 is also commonly known as FeNi48, 48Ni-Fe alloy or 4J48 in different markets and standards.
Can SASA ALLOY provide custom size Alloy 48 Plate?
Yes. SASA ALLOY can supply Alloy 48 Plate in customized thickness, width, length, cut-to-size plate and machined plate according to customer requirements.
What certificate can be supplied with Alloy 48 Plate?
EN 10204 3.1 material certificate can be supplied. Chemical composition, mechanical properties, heat number and traceability information can be provided according to order requirements.
What are the main applications of Alloy 48 Plate?
Alloy 48 Plate is mainly used for glass sealing, ceramic sealing, electronic components, vacuum devices, relays, optical equipment and precision instrument parts.
Contact Us
If you are looking for Alloy 48 Plate, FeNi48 Plate or customized controlled expansion alloy materials, please contact SASA ALLOY with your required grade, size, standard, surface condition, quantity and inspection requirements. Our team can provide professional material solutions for precision alloy applications.
