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High Quality 4J45 Precision Alloy Rod Supplier for Electronics
Source premium high quality 4J45 precision alloy rod directly from a trusted China supplier specializing in electronics applications. This controlled expansion Fe-Ni alloy rod (≈45% nickel) offers stable thermal expansion matching soft glass and ceramics, ideal for vacuum sealing, electronic packaging, and precision components. As a leading 4J45 nickel iron alloy rod manufacturer, we deliver high-purity, custom-sized rods with excellent machinability and reliability for global electronics buyers.
- Overview
- Specification
- Features & Applications
- FAQs
- Recommended Products
Product Introduction Overview
4J45 (also referred to as FeNi45 or similar to Nilo 45) is a high-performance controlled expansion nickel-iron precision alloy rod engineered for matched thermal expansion with soft glass and ceramics in the 20–400°C range. With a typical CTE of 6.5–7.5 × 10⁻⁶/°C, this Fe-Ni alloy rod ensures hermetic sealing integrity and dimensional stability in demanding electronic environments.
As a professional high quality 4J45 precision alloy rod supplier for electronics, we manufacture under strict Chinese standards with high purity composition (Ni 44.5–45.5%, Fe balance) and superior surface finish. Ideal for vacuum industry, electronic packaging, and precision instrumentation—our China-based production offers competitive pricing, custom diameters, and fast delivery for international buyers seeking reliable controlled expansion alloy rods.
Product Features
Our 4J45 precision alloy rod delivers exceptional properties tailored for electronic and sealing applications:
- Matched low thermal expansion (CTE ≈6.5–7.5 × 10⁻⁶/°C from 20–400°C) for reliable glass-to-metal and ceramic seals
- High vacuum compatibility with excellent hermeticity and leak-tight performance
- Good mechanical strength and ductility — tensile strength ≥450–590 MPa depending on temper
- Superior machinability and weldability — easy to form, cut, and join using standard processes
- High purity Fe-Ni composition (minimal impurities) ensuring consistent electrical and thermal behavior
- Custom rod sizes available — diameters from small precision rods to larger bars, cut-to-length for wholesale orders
Product Applications
4J45 Fe-Ni controlled expansion precision alloy rod is widely used in temperature-sensitive electronic and vacuum systems due to its stable expansion matching. Common applications include:
- Glass-to-metal sealing — leads, headers, and feedthroughs in vacuum tubes, relays, and sensors
- Electronic packaging — hermetic seals for transistors, integrated circuits, and semiconductor devices
- Precision impedance diaphragms and wet/dry spring relays in measurement instruments
- Vacuum industry components — electrical feedthroughs, connectors, and sealing structures
- Ceramic sealing and high-reliability electronics where thermal mismatch must be minimized
Purchase high quality 4J45 precision alloy rod from our China supplier to ensure optimal performance in these critical electronics and sealing applications.
Product FAQ
Q1: What is the thermal expansion coefficient of 4J45 controlled expansion alloy rod?
A: 4J45 nickel-iron precision alloy rod features a controlled CTE of approximately 6.5–7.5 × 10⁻⁶/°C (20–400°C), perfectly matched for soft glass and ceramic sealing in electronics.
Q2: Is 4J45 precision alloy rod suitable for glass-to-metal sealing in vacuum applications?
A: Yes, this Fe-Ni controlled expansion alloy rod is specifically designed for hermetic glass-to-metal and ceramic seals, widely used in vacuum tubes, relays, and electronic packaging.
Q3: Can I order custom sizes of high quality 4J45 nickel iron alloy rod?
A: Absolutely—as a leading China supplier, we provide custom diameters, lengths, and surface finishes for 4J45 precision alloy rods to meet your electronics project requirements.
Q4: What are the typical mechanical properties of 4J45 precision alloy rod?
A: Our 4J45 controlled expansion rods offer good strength (tensile ≥450 MPa), ductility, and machinability similar to austenitic alloys, suitable for precision forming in electronic components.
Q5: Why choose your company as the 4J45 precision alloy rod supplier for electronics?
A: We deliver high-purity, consistent quality 4J45 rods with competitive factory pricing, strict quality control, and reliable global shipping—making us a preferred high quality supplier for electronics manufacturers worldwide.
