Our 4J34 Fe-Ni-Co Alloy Wire is a top-notch solution for industrial applications where thermal stability is a must. With a composition of 36% nickel, 4% cobalt, and 60% iron, it boasts an ultra-low CTE of ~0.7 ppm/°C (20-200°C), keeping components dimensionally stable even when temperatures shift. It’s strong, corrosion-resistant, and easy to work with, making it a favorite for precision manufacturing. Whether you’re crafting molds or sensors, our 4J34 wire ensures your parts stay rock-solid.
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The industrial sector is leaning hard into precision and efficiency, with automation, aerospace, and electronics driving demand for materials that don’t budge under heat. The global market for low- Expansion Alloy s is growing at a steady clip, with a projected CAGR of 4.5% through 2032, fueled by advancements in smart manufacturing and miniaturization. Industries like aerospace need thermally stable materials for composite molds, while electronics demand precision in sensors and connectors. Our 4J34 wire is perfectly suited to these trends, delivering the stability and reliability that modern industrial applications require.
| 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 |
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Our 4J34 Fe-Ni-Co Alloy Wire shines in a range of industrial uses. It’s a go-to for precision molds in aerospace and automotive manufacturing, where dimensional accuracy is non-negotiable. In electronics, it’s used in sensors and connectors that need to stay stable under temperature changes. Cryogenic systems, like those in LNG processing, rely on 4J34 for its performance at low temperatures. You’ll also find it in optical systems and industrial gauges, where its low CTE ensures consistent results. Wherever thermal stability matters, our 4J34 wire gets the job done.
Comparison Table: 4J34 Fe-Ni-Co vs. 4J32 Super Invar vs. Standard Invar
Parameter | 4J34 Fe-Ni-Co | 4J32 Super Invar | Standard Invar |
|---|---|---|---|
Composition | 36% Ni, 4% Co, 60% Fe | 31% Ni, 5% Co, 64% Fe | 36% Ni, 64% Fe |
CTE (ppm/°C, 20-200°C) | ~0.7 | ~0.35–0.63 | ~1.2–1.5 |
Temperature Range | -40°C to 200°C | -32°C to 100°C | -50°C to 230°C |
Curie Temperature | ~250°C | ~220°C | ~279°C |
Yield Strength (MPa) | ~300 | ~276 | ~260–300 |
Tensile Strength (MPa) | ~500 | ~483 | ~450–550 |
Density (g/cm³) | 8.20 | 8.15 | 8.05 |
Applications | Precision molds, industrial sensors | Telescope actuators, optical mounts | Clocks, precision instruments |
Corrosion Resistance | Excellent | Good | Moderate |
We know the market’s full of alloy options, but our 4J34 Fe-Ni-Co Alloy Wire stands out for its quality and versatility. Our rigorous quality control ensures a consistent CTE and robust mechanical properties (yield strength ~300 MPa, tensile strength ~500 MPa). Unlike others, we offer customized wire forms and sizes, tailored to your needs, with quick delivery to keep your projects on track. Our efficient production process cuts costs without compromising performance, and our alloy’s superior corrosion resistance gives it an edge in harsh environments. With decades of experience, we’re the partner you can rely on for precision alloy solutions.
Why Choose Our 4J34 Fe-Ni-Co Alloy Wire?
Our 4J34 Fe-Ni-Co Alloy Wire is built for the demands of modern industry. Its ultra-low thermal expansion, durability, and corrosion resistance make it perfect for precision molds, sensors, and more. Whether you’re in aerospace, electronics, or advanced manufacturing, our wire delivers the stability you need to succeed. Reach out today to discover how 4J34 can elevate your industrial components!
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.
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FAQs
What is 4J34 Fe-Ni-Co Alloy Wire?
It’s a nickel-iron-cobalt alloy wire designed for stable thermal expansion, ideal for industrial components requiring dimensional consistency across temperature changes.What are the key properties of 4J34?
It offers a low CTE of ~0.7 ppm/°C (20-200°C), excellent corrosion resistance, and high mechanical strength for reliable performance.What industries use 4J34 Alloy Wire?
Aerospace, industrial manufacturing, electronics, and precision engineering rely on it for thermally stable components.What are common applications for 4J34?
It’s used in precision molds, optical systems, cryogenic equipment, and industrial sensors where minimal thermal expansion is critical.How does 4J34 compare to other low-expansion alloys?
Its optimized Ni-Co-Fe composition provides a lower CTE than many alternatives, ensuring superior stability in specific temperature ranges.What temperature range is 4J34 effective in?
It maintains low thermal expansion from -40°C to 200°C, ideal for industrial environments with moderate temperature fluctuations.Is 4J34 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, though slow speeds and proper tooling are recommended for best results.How does 4J34 align with industry trends?
It meets the rising demand for high-precision, thermally stable materials in aerospace, electronics, and advanced manufacturing driven by automation and miniaturization.
