Invar alloy 4j29 tube
Invar alloy 4j29 tube is a low-expansion iron-nickel-cobalt alloy. Its typical composition is 29% nickel and 17% cobalt, with the remainder being iron. It has a very low coefficient of thermal expansion (CTE) over a wide temperature range (from -60℃ to +80℃). The CTE is close to zero. It is made into a hollow tube shape by precision rolling or drawing. It has high dimensional stability, good machinability and weldability.
Invar alloy 4j29 tube has a very low CTE and excellent dimensional stability. It is widely used in high-precision fields. In the aerospace industry, it is used for satellite frames and optical parts. In electronic packaging, it is used for semiconductor and laser tube shells. In precision instruments, it is used for telescope tubes and measuring devices. In the energy sector, it is used for LNG low-temperature connectors. It ensures reliable performance under extreme temperatures and is a key material for advanced technology.
Features of Invar alloy 4j29 tube
Ultra-low thermal expansion: The CTE of Invar alloy 4j29 tube is below 1.5×10⁻⁶/℃ from room temperature to 100℃. It is much better than common metal materials. It is suitable for environments with large temperature differences.
High strength and rigidity: Invar alloy 4j29 tube has low expansion and good mechanical properties. It can bear some mechanical stress.
Excellent corrosion resistance: The surface of Invar alloy 4j29 tube can be plated or passivated. It can adapt to complex environments.
Process adaptability: Invar alloy 4j29 tube can be turned, welded and brazed. It is easy to integrate with other materials.
Applications of Invar alloy 4j29 tube
Aerospace: Invar alloy 4j29 tube is used for satellite frames and supports of optical instruments. It can prevent thermal deformation from affecting accuracy.
Electronic packaging: Invar alloy 4j29 tube is used as the shell for semiconductor or laser packaging. It can protect sensitive components from thermal stress damage.
Precision instruments: Invar alloy 4j29 tube is used to make the tubes of astronomical telescopes and the frames of high-precision measuring devices. It can ensure long-term dimensional stability.
Energy field: Invar alloy 4j29 tube is used in the connecting parts of LNG pipelines. It can adapt to extremely low-temperature environments.
|
Parameter |
Specification Range / Typical Value |
Remarks |
|
Outer Diameter (OD) |
1mm ~ 150mm |
Custom sizes available |
|
Wall Thickness |
0.2mm ~ 10mm |
Thin-walled for electronics |
|
Length |
Custom (typically ≤6m) |
Fixed cuts or continuous coils |
|
CTE (20~100°C) |
≤1.5×10⁻⁶/°C |
Near-zero expansion |
|
Density |
8.1 g/cm³ |
Similar to steel |
|
Melting Point |
~1430°C |
High thermal stability |
|
Tensile Strength |
≥440 MPa |
Annealed condition |
|
Yield Strength |
≥240 MPa |
|
|
Elongation |
≥30% |
Excellent ductility |
|
Surface Finish |
Bright annealed, pickled, polished |
Customizable |
|
Standards |
GB/T 15018 (CN) | ASTM F1684 (US) | JIS C2520 (JP) |
International compliance |
FAQ
Are you a factory or manufacturer?
A: Yes, we are a factory but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.
What is the delivery method?
A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.
Why is your product so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process and we obtain raw material directly from its source.
Do you do spot quality inspection or full inspection?
A: 100% full inspection for sure. All unqualified products are discarded.
How do you ensure your lead time?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.
What is the MOQ of Invar alloy 4j29 tube?
A: Depends on quantity, generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days which depends on the quantity and production.
What is kind of the package?
A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo
What is the lead time?
A: from order placed to cargo receiving will take around 10-25 days.
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