All Products
-
Alfred***We received the goods, everything went fine. Perfect packaging, good product quality, good price - we are satisfied. -
May***The product quality is very good, beyond my expectations, the actual use of fully meet my needs, we will buy again. -
Matthew***I bought low expansion alloy from Joy, She is a very responsible lady, Huona's products quality is pretty good.
4J42 Alloy Tube (42 Alloy / Fe-Ni Controlled Expansion Alloy Tube)
| Place of Origin | china |
|---|---|
| Brand Name | HUONA |
| Certification | SGS ISO9001 |
| Model Number | pipe |
| Minimum Order Quantity | 10kg |
| Price | negotation |
| Packaging Details | Case |
| Delivery Time | 30days |
| Payment Terms | T/T |
| Supply Ability | 1000kg/week |
Contact me for free samples and coupons.
WhatsAPP:0086 18588475571
Wechat: 0086 18588475571
Skype: sales10@aixton.com
If you have any concern, we provide 24-hour online help.
xProduct Details
| Material Grade | 4J42 / 42 Alloy | Material Type | Controlled Expansion Alloy |
|---|---|---|---|
| Composition | Fe-Ni (Ni 41–43%) | Key Property | Controlled Thermal Expansion |
| Hardness | Annealed / Semi-hard / Hard | Manufacturing Method | Seamless / Welded |
| Color | Metallic Grey | Customization | OD / ID / Wall Thickness / Length / Tolerance |
Product Description
Product Overview
4J42 alloy tube, commonly known as 42 Alloy, is an Fe-Ni controlled-expansion alloy designed to match the thermal expansion rate of borosilicate glass and ceramics.
With stable thermal properties, excellent sealing performance, and good mechanical strength, 4J42 tubing is widely used in electronic packaging, hermetic seals, IC lead frames, vacuum devices, and sensor housings.
It provides tight dimensional tolerances, stable expansion behavior, and excellent weldability and formability.
Key Features
-
Controlled Thermal Expansion
CTE matches hard glass and ceramics: ~5.0 ×10⁻⁶/°C (20–300°C). -
Excellent Hermetic Sealing
Widely used in glass-to-metal and ceramic-to-metal sealing. -
High Dimensional Stability
Ensures reliable performance in precision electronic components. -
Good Machinability & Weldability
Suitable for deep drawing, welding, cold working, and precision forming. -
Stable Mechanical Properties
Good tensile strength and hardness options. -
Customizable Dimensions
OD, ID, wall thickness, length, and tolerances available per request.
Technical Specifications
| Item | Value |
|---|---|
| Material | 4J42 (Fe-Ni Controlled Expansion Alloy) |
| Equivalent Grade | 42 Alloy / ASTM F30 |
| Ni Content | 41–43% |
| CTE (20–300°C) | ~5.0 ×10⁻⁶/°C |
| Outer Diameter (OD) | 0.5–60 mm (custom) |
| Wall Thickness | ≥ 0.5 mm |
| Inner Diameter (ID) | Custom |
| Length | 10–6000 mm |
| Surface Finish | Bright / Polished / Oxide-free |
| Density | 8.1 g/cm³ |
| Melting Point | ~1425 °C |
| Hardness Condition | Annealed / 1/2 Hard / Hard |
| Tensile Strength | 500–700 MPa |
| Yield Strength | 300–430 MPa |
| Standards | GB/T 15008 |
Main Applications
| Industry | Typical Uses |
|---|---|
| Electronics & Semiconductors | IC lead frames, device packages, hermetic seals |
| Glass-to-Metal Sealing | Vacuum tubes, relay housings, sensor casings |
| Power Electronics | Connectors, headers, terminal tubes |
| Instrumentation | Precision housings, signal transmission tubes |
| Aerospace & Military | Hermetically sealed components, sensor assemblies |
| Optoelectronics | Fiber optic sleeves, laser housings |
Product Attributes(Alibaba Format)
| Attribute | Value |
|---|---|
| Material Grade | 4J42 / 42 Alloy |
| Material Type | Controlled Expansion Alloy |
| Composition | Fe-Ni (Ni 41–43%) |
| Key Property | Controlled Thermal Expansion |
| CTE (20–300°C) | ~5.0 ×10⁻⁶/°C |
| Outer Diameter (OD) | 0.5–60 mm |
| Wall Thickness | ≥ 0.5 mm |
| Length | 10–6000 mm |
| Inner Diameter | Custom |
| Surface | Bright / Polished / Clean |
| Hardness | Annealed / Semi-hard / Hard |
| Manufacturing Method | Seamless / Welded |
| Tensile Strength | 500–700 MPa |
| Density | 8.1 g/cm³ |
| Color | Metallic Grey |
| Form | Straight Tube / Cut Length / Coil |
| Applications | Electronics / Sealing / Sensors / Aerospace |
| Customization | OD / ID / Wall Thickness / Length / Tolerance |
Recommended Products