Our Invar 4J36 Nickel-Iron Alloy Bar is a top-notch choice for aerospace and high-precision tooling, offering ultra-low thermal expansion for pinpoint accuracy. With 36% nickel and 64% iron, it delivers a CTE of ~1.2–1.5 ppm/°C (20-100°C), keeping your components stable through temperature shifts. It’s durable, corrosion-resistant, and easy to work with, making it perfect for high-accuracy applications. Whether you’re crafting aerospace molds or precision sensors, our 4J36 bar ensures rock-solid reliability.
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The aerospace and precision manufacturing markets are thriving, with a projected CAGR of 6.0% through 2032, fueled by demand for lightweight, high-precision materials. Composite tooling for aircraft and satellites requires materials that resist thermal distortion, while electronics and instrumentation need stability for sensors and optical systems. The rise of advanced manufacturing and miniaturization is driving the need for alloys like our 4J36 bar, which delivers exceptional dimensional stability. We’re ready to meet these trends with a product built for precision and performance.
| 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 Invar 4J36 Nickel-Iron Alloy Bar is a powerhouse in high-precision applications. In aerospace, it’s used for tooling and fixtures that demand exact tolerances during composite molding. Composite molds for aircraft components rely on its stability to maintain shape under heat. Precision sensors and optical systems, like those in telescopes or lasers, benefit from its ultra-low CTE for consistent performance. Scientific instruments, such as seismographs and interferometers, also depend on its reliability. Wherever precision matters, our 4J36 bar delivers.
Comparison Table: Invar 4J36 vs. 4J32 Super Invar vs. Alloy 42 (4J42)
Parameter | Invar 4J36 | 4J32 Super Invar | Alloy 42 (4J42) |
|---|---|---|---|
Composition | 36% Ni, 64% Fe | 31% Ni, 5% Co, 64% Fe | 42% Ni, 58% Fe |
CTE (ppm/°C, 20-100°C) | ~1.2–1.5 | ~0.35–0.63 | ~4.0–4.7 (20-300°C) |
Temperature Range | -50°C to 230°C | -32°C to 100°C | -40°C to 300°C |
Curie Temperature | ~279°C | ~220°C | ~370°C |
Yield Strength (MPa) | ~260–300 | ~276 | ~310 |
Tensile Strength (MPa) | ~450–550 | ~483 | ~520 |
Density (g/cm³) | 8.05 | 8.15 | 8.12 |
Applications | Aerospace tooling, composite molds | Telescope actuators, optical mounts | Semiconductor lead frames, seals |
Corrosion Resistance | Moderate | Good | Good |
We know the market has plenty of alloy options, but our Invar 4J36 Nickel-Iron Alloy Bar stands out for its unmatched precision and quality. Our rigorous quality control ensures a consistent CTE and robust mechanical properties (yield strength ~260–300 MPa, tensile strength ~450–550 MPa). We offer customized bar sizes and forms to fit your exact specs, with faster delivery than many alternatives. Our efficient production process keeps costs low without compromising performance, and our alloy’s ultra-low thermal expansion gives it an edge in aerospace and tooling applications. With decades of expertise, we’re your trusted partner for high-performance alloy solutions.
Why Choose Our Invar 4J36 Nickel-Iron Alloy Bar?
Our Invar 4J36 Nickel-Iron Alloy Bar is built for precision in aerospace and high-precision tooling. Its ultra-low thermal expansion, durability, and workability make it ideal for composite molds, sensors, and optical systems. Whether you’re crafting aircraft components or cutting-edge instruments, our bar ensures your parts stay stable and reliable. Contact us today to see how 4J36 can take your projects to new heights!
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. We also provide chemical analysis reports for every FeCrAl alloy, NiCr alloy, and other products purchased.
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 Invar 4J36 Nickel-Iron Alloy Bar?
It’s a nickel-iron alloy bar with ultra-low thermal expansion, designed for precision in aerospace and high-precision tooling applications.What are the key properties of Invar 4J36?
It offers a CTE of ~1.2–1.5 ppm/°C (20-100°C), excellent dimensional stability, and moderate corrosion resistance, ideal for precision components.What industries use Invar 4J36 Alloy Bar?
Aerospace, composite manufacturing, electronics, and scientific instrumentation rely on it for thermally stable parts.What are common applications for Invar 4J36?
It’s used in aerospace tooling, composite molds, precision sensors, and optical systems requiring minimal thermal expansion.How does Invar 4J36 compare to other low- Expansion Alloy s?
Its 36% nickel content delivers one of the lowest CTEs among alloys, providing superior stability for precision applications.What temperature range is Invar 4J36 effective in?
It maintains low thermal expansion from -50°C to 230°C, perfect for aerospace and tooling environments.Is Invar 4J36 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, though slow speeds are recommended for precision machining.How does Invar 4J36 align with industry trends?
It supports the demand for lightweight, high-precision materials in aerospace, composite technology, and advanced manufacturing.
