Our 4J34 Fe-Ni-Co alloy plate is engineered for stable thermal performance in industrial components. With a balanced composition of 29% nickel, 17% cobalt, and 54% iron, this alloy—sometimes known as a controlled- Expansion Alloy —offers a thermal expansion coefficient that aligns perfectly with certain ceramics and glasses. This makes it ideal for creating reliable hermetic seals in electronics, precision instruments, and more. From -70°C to 500°C, our 4J34 alloy ensures consistent performance, with top-notch corrosion resistance, weldability, and machinability that meet the demands of high-stakes applications.
The industrial components market is thriving, driven by advancements in electronics, aerospace, and medical technologies. Market data projects a CAGR of 6.2% for precision alloys like 4J34 through 2030, fueled by the push for compact, durable, and thermally stable components. Industries are increasingly focused on materials that can handle extreme conditions while maintaining performance, especially in 5G infrastructure, electric vehicles, and IoT devices. Controlled-expansion alloys like 4J34 are critical for applications requiring minimal thermal distortion and long-term reliability, positioning them as a cornerstone in modern manufacturing.
| Elements | 4J29 | 4J36 | |
| Carbon (C) | Not greater than | 0.03 | 0.05 |
| Sulfur (S) | 0.02 | 0.02 | |
| Phosphorus (P) | 0.02 | 0.02 | |
| Manganese (Mn) | ≤0.50 | 0.20-0.60 | |
| Silicon (Si) | ≤0.30 | ≤0.30 | |
| Nickel (Ni) | 28.5-29.5 | 35.0-37.0 | |
| Chromium (Cr) | - | - | |
| Cobalt (Co) | 16.8-17.8 | - | |
| Iron (Fe) | Rest | Rest | |
| Other Elements |
| Alloy Grade | 20°C-100°C | 20°C-300°C | 20°C-500°C |
| 4J36 Invar Alloy | 1.2×10⁻⁶ /°C | 2.5×10⁻⁶ /°C | - |
| 4J29 Kovar Alloy | 4.6×10⁻⁶ /°C | 5.5×10⁻⁶ /°C | 6.2×10⁻⁶ /°C |
| Alloy Grade | 4J36 Invar Alloy | 4J29 Kovar Alloy |
| Density (g/cm³) | 8.1 | 8.2 |
| Tensile Strength (MPa) | 500-600 | 600-700 |
| Yield Strength (MPa) | 250-350 | 300-400 |
| Hardness (HV) | 150-200 | 200-250 |
| Alloy Grade | 4J36 Invar Alloy | 4J29 Kovar Alloy |
| Electrical Resistivity (10⁻⁶ Ω·cm) | 80 | 50 |
| Thermal Conductivity (W/m·K) | 10-12 | 16-18 |
For more details, pls directly contact us.
Our 4J34 alloy plate is a versatile solution for a range of industries:
Electronics: Ensures hermetic seals in semiconductor packages, vacuum tubes, and connectors.
Aerospace: Supports sensors and avionics that require thermal stability in extreme conditions.
Medical Devices: Used in precision equipment like pacemakers and diagnostic tools for reliable seals.
Telecommunications: Enhances microwave components and optical systems with stable performance.
Automotive: Powers robust seals in EV battery systems and sensor modules.
Its low thermal expansion and durability make it perfect for any application where precision and stability are non-negotiable.
Comparison Table: 4J34 Fe-Ni-Co Alloy Plate vs. Other Thermal Alloys
Parameter | 4J34 Fe-Ni-Co Alloy Plate | Other Thermal Alloys |
|---|---|---|
Thermal Expansion (CTE) | Matches specific ceramics (~4.5 × 10⁻⁶ /K) | Often less compatible, higher CTE variance |
Temperature Range | -70°C to 500°C | Typically limited to 300–450°C |
Corrosion Resistance | Excellent, withstands harsh environments | Moderate, varies by alloy |
Weldability | High, supports robust brazing | Inconsistent, some alloys less reliable |
Machinability | Superior, enables precision fabrication | Moderate, may need specialized tools |
Applications | Electronics, aerospace, medical devices | Limited to fewer, less demanding uses |
Durability | Exceptional, resists thermal fatigue | Varies, prone to stress under extremes |
Customization | Highly customizable (size, form, thickness) | Limited options, less flexibility |
Our 4J34 alloy plate sets the standard for quality and performance:
Precision Engineering: Manufactured to ASTM F1466 standards, ensuring consistent composition, strength, and thermal properties.
Tailored Solutions: Available in custom sizes, thicknesses (0.5–10mm), and forms to meet your exact specifications.
Unmatched Quality: Rigorous testing for surface quality, grain size, and inclusions guarantees superior performance.
Quick Turnaround: Flexible MOQs starting at 100kg and ready-to-ship stock for fast delivery.
Technical Expertise: Our R&D team provides dedicated support to optimize your application.
Compared to other options, our 4J34 alloy offers a unique blend of thermal stability, customization, and cost-efficiency, making it the smart choice for demanding projects.
Conclusion
Our 4J34 Fe-Ni-Co alloy plate is the ultimate choice for stable thermal performance in industrial components. Its precise thermal expansion, durability, and versatility make it a trusted material across electronics, aerospace, and medical applications. As industries demand more reliable and efficient solutions, our 4J34 alloy delivers, backed by our commitment to quality, customization, and rapid delivery. Choose our 4J34 alloy plate to elevate your next project with unmatched precision and performance.
For more details, pls directly contact us.
About Us:
Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications.For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.
Client Visits
Building Stronger Partnerships
We support all kinds of testing:
FAQs
What is 4J34 Fe-Ni-Co alloy plate used for?
It’s designed for industrial components requiring stable thermal performance, like hermetic seals in electronics and precision instruments.Why is 4J34 ideal for thermal stability?
Its low thermal expansion coefficient closely matches specific ceramics and glasses, ensuring reliable performance under temperature fluctuations.Which industries use 4J34 alloy plates?
Electronics, aerospace, telecommunications, automotive, and medical device industries rely on it for precision and durability.How does 4J34 handle extreme conditions?
It remains stable from -70°C to 500°C, perfect for harsh industrial environments.What are the key features of 4J34 alloy?
Low thermal expansion, high corrosion resistance, excellent weldability, and machinability for precise applications.Can 4J34 be customized for specific needs?
Yes, we offer custom thicknesses, widths, and forms (plate, sheet, strip) to suit your project requirements.What standards does 4J34 meet?
It complies with ASTM F1466 and other industry standards for composition, strength, and thermal properties.How does 4J34 enhance component longevity?
Its thermal stability and resistance to stress ensure long-lasting, reliable performance in critical components.
