Alloy 42 Plate
Product Short Description
Alloy 42 Plate, also known as Invar 42 Plate, FeNi42 Plate, 42% Nickel-Iron Controlled Expansion Alloy Plate, is a precision nickel-iron alloy material with stable controlled thermal expansion performance. It is widely used in glass-to-metal sealing, ceramic-to-metal sealing, electronic components, semiconductor packaging, optical devices, precision instruments and hermetic sealing applications.
SASA ALLOY supplies Alloy 42 plates in customized thickness, width, length and surface condition according to industrial project 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 42 Plate
- Material Grade: Alloy 42 / Invar 42 / FeNi42 / 42Ni-Fe
- Product Type: Controlled Expansion Alloy Plate
- Main Feature: Controlled thermal expansion and good dimensional stability
- Applications: Glass sealing, ceramic sealing, electronic packaging, precision components and optical devices
Product Parameters
| Item | Specification |
|---|---|
| Product Name | Alloy 42 Plate |
| Material Grade | Alloy 42 / Invar 42 / FeNi42 / 42Ni-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 42 plate is designed to provide controlled thermal expansion performance. 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 % | 41.0 – 43.0 | Balance | ≤0.05 | ≤0.80 | ≤0.30 | ≤0.020 | ≤0.020 | ≤0.50 | ≤0.30 | ≤0.25 |
Mechanical Properties
Mechanical properties of Alloy 42 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 42 Sheet | 0.5 – 6 mm | Cold Rolled / Pickled / Polished | Electronic components, glass sealing parts, precision small parts |
| Alloy 42 Plate | 6 – 100 mm | Hot Rolled / Ground / Machined | Optical devices, fixtures, precision tooling and sealing components |
| Alloy 42 Cut Plate | Customized | Cut / Ground / Machined | Custom machining blanks and precision components |
| Alloy 42 Precision Plate | According to drawing | Ground / CNC Machined | Hermetic sealing assemblies, optical and electronic parts |
Equivalent Standards and International Names
Alloy 42 plate is known by different names in international markets. Customers may search for Alloy 42, Invar 42, FeNi42, 42Ni-Fe alloy plate or controlled expansion alloy plate.
| Country / Standard | Common Name | Equivalent Grade |
|---|---|---|
| Commercial Name | Alloy 42 | Nickel-Iron Controlled Expansion Alloy |
| Fe-Ni System | FeNi42 | 42Ni-Fe Alloy |
| Alternative Name | Invar 42 | Alloy 42 Equivalent |
| China | 4J42 | FeNi42 Equivalent |
| Application Name | Glass Sealing Alloy | Controlled Expansion Alloy |
Production Process Flow
The production process of Alloy 42 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 42 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 42 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 42 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 42 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 42 Is Used |
|---|---|---|
| Electronics | Lead frames, connectors, electronic packaging parts | Controlled expansion and stable sealing performance |
| Glass Sealing | Glass-to-metal sealing components, vacuum devices | Thermal expansion compatible with selected glass materials |
| Semiconductor | Package parts, precision support plates, sealing components | Dimensional stability and reliable material consistency |
| Optical Equipment | Optical frames, laser parts, precision holders | Maintains shape under temperature changes |
| Aerospace and Instruments | Precision components, fixtures, measuring devices | Controlled expansion and reliable dimensional control |
Why Choose SASA ALLOY?
- Professional supplier of Alloy 42 / FeNi42 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, electronic packaging, optical devices and precision instrument applications
FAQ
What is Alloy 42 Plate?
Alloy 42 Plate is a nickel-iron controlled expansion alloy plate containing approximately 42% nickel. It is commonly used for glass-to-metal sealing, electronic packaging and precision components.
Is Alloy 42 the same as FeNi42?
Yes. Alloy 42 is also commonly known as FeNi42, Invar 42, 42Ni-Fe alloy or 4J42 in different markets and standards.
Can SASA ALLOY provide custom size Alloy 42 plate?
Yes. SASA ALLOY can supply Alloy 42 plate in customized thickness, width, length, cut-to-size plate and machined plate according to customer requirements.
What certificate can be supplied with Alloy 42 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 42 plate?
Alloy 42 plate is mainly used for glass sealing, ceramic sealing, electronic packaging, semiconductor components, optical equipment and precision instrument parts.
Contact Us
If you are looking for Alloy 42 Plate, Invar 42 Plate, FeNi42 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.
