4J50 Fe-Ni Sealing Alloy Precision Strip
4J50 Fe-Ni Sealing Alloy Precision Strip (product code PT-XHA-PRA-00067) is listed under Industrial Products & MRO > Special Alloys > Precision Alloys and supplied in Singapore by PANDA COLLECTIONS (PANDATEC PTE. LTD.), a B2B procurement partner for businesses. An iron-50 % nickel controlled-expansion alloy matched to soft glasses for hermetic seals. Prices are quoted on request.
| Product code | PT-XHA-PRA-00067 |
|---|---|
| Category | Industrial Products & MRO > Special Alloys > Precision Alloys |
| Grade / designation | GB/T 15018 4J50 |
| Product form | Strip & Coil |
| Applicable standards | GB/T 15018 (confirmed per order) |
| Available forms | Precision strip, wire, bar |
| Certificates | EN 10204 3.1 MTC on request |
| Minimum order | On request |
| Country of origin | China |
| Pricing | On request – customised quotation by PANDA COLLECTIONS |
| Supplied in | Singapore |
Product description
An iron-50 % nickel controlled-expansion alloy matched to soft glasses for hermetic seals. PANDA COLLECTIONS sources 4J50 (Fe-50Ni) for buyers in Singapore and internationally for project and bulk orders. Mill test certificates to EN 10204 3.1, full heat traceability, melting route (e.g. ESR/VAR), heat-treatment condition and NDT/testing requirements are confirmed per enquiry. Prices are not listed online; every order is quoted individually based on grade, dimensions, quantity, testing and certification requirements.
Technical data
| Chemical composition (%) | Ni 49.5–50.5, Mn ≤0.8, Si ≤0.3, C ≤0.05, Fe bal. |
|---|---|
| Mechanical properties | Strip: soft <570 MPa, hard >700 MPa; wire: soft <590 MPa, hard >820 MPa |
| Physical properties | Mean CTE 9.2–10.0 ×10⁻⁶/°C (20–300 °C) |
Typical applications
- Glass-to-metal seals
- Electronic packages
- Relay and vacuum devices
Industries: Electrical & Electronics
Updated October 27, 2026
Frequently asked questions
What is 4J50 (Fe-50Ni) used for?
Glass-to-metal seals, electronic packages, relay and vacuum devices.
Which standards apply to 4J50 (Fe-50Ni)?
GB/T 15018. Compliance, testing and certificates are confirmed for each order.
What forms and sizes of 4J50 (Fe-50Ni) are available?
Precision strip, wire, bar. Sizes are cut or produced to order.
How do I get a price for 4J50 Sealing Alloy Precision Strip?
Prices are not published. Request a customised quotation from PANDA COLLECTIONS with the product code PT-XHA-PRA-00067, size, quantity, testing and certificate requirements, and delivery address.
Can mill test certificates be provided?
Mill test certificates to EN 10204 3.1 with heat traceability can be requested. Melting route (e.g. ESR/VAR), heat-treatment condition and NDT requirements are confirmed per enquiry.
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