Our 4J34 Fe-Ni-Co Alloy Bar is a top choice for industrial applications needing rock-solid thermal stability. With 36% nickel, 4% cobalt, and 60% iron, it delivers a super-low CTE of ~0.7 ppm/°C (20-200°C), keeping your components steady through temperature swings. It’s tough, corrosion-resistant, and easy to machine, making it perfect for precision manufacturing. Whether you’re crafting molds or sensors, our 4J34 bar ensures your parts perform flawlessly.
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The industrial manufacturing sector is booming, with a projected CAGR of 5.6% through 2032, driven by automation, aerospace, and electronics advancements. As industries push for smarter, more precise systems, low- Expansion Alloy s like our 4J34 bar are critical. Aerospace relies on them for stable molds and sensors, while electronics need precision in connectors and components. The rise of smart manufacturing and IoT is fueling demand for materials that stay reliable under thermal stress. Our 4J34 bar is built to meet these trends with top-notch stability.
| 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 Bar is a versatile performer in industrial applications. It’s used in precision molds for aerospace and automotive manufacturing, where dimensional accuracy is critical. Optical systems rely on its stability for consistent alignment in high-end instruments. Cryogenic equipment, like LNG systems, benefits from its performance at low temperatures. Industrial sensors and gauges also use it to maintain accuracy under temperature changes. Wherever thermal stability is a must, our 4J34 bar delivers.
Comparison Table: 4J34 Fe-Ni-Co vs. 4J32 Super Invar vs. Invar 4J36
|
Parameter |
4J34 Fe-Ni-Co |
4J32 Super Invar |
Invar 4J36 |
|---|---|---|---|
|
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 |
Aerospace tooling, composite molds |
|
Corrosion Resistance |
Excellent |
Good |
Moderate |
We know the market offers plenty of alloy options, but our 4J34 Fe-Ni-Co Alloy Bar stands out for its precision and quality. Our strict quality control ensures a consistent CTE and robust mechanical properties (yield strength ~300 MPa, tensile strength ~500 MPa). We offer customized bar sizes and forms to match your exact needs, with faster delivery than many alternatives. Our efficient production process keeps costs low without compromising performance, and our alloy’s excellent corrosion resistance gives it an edge in industrial applications. With years of expertise, we’re your trusted partner for high-performance alloy solutions.
Why Choose Our 4J34 Fe-Ni-Co Alloy Bar?
Our 4J34 Fe-Ni-Co Alloy Bar is engineered for stable thermal performance in industrial applications. Its ultra-low thermal expansion, durability, and corrosion resistance make it ideal for precision molds, sensors, and optical systems. Whether you’re in aerospace, electronics, or advanced manufacturing, our bar ensures your components stay reliable. Contact us today to see how 4J34 can elevate your industrial projects!
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.
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FAQs
-
What is 4J34 Fe-Ni-Co Alloy Bar?
It’s a nickel-iron-cobalt alloy bar designed for stable thermal performance, ideal for industrial applications needing minimal thermal expansion. -
What are the key properties of 4J34?
It offers a CTE of ~0.7 ppm/°C (20-200°C), excellent corrosion resistance, and high mechanical strength, perfect for precision components. -
What industries use 4J34 Alloy Bar?
Industrial manufacturing, aerospace, electronics, and scientific instrumentation rely on it for thermally stable parts. -
What are common applications for 4J34?
It’s used in precision molds, optical systems, industrial sensors, and cryogenic equipment requiring dimensional stability. -
How does 4J34 compare to other low-expansion alloys?
Its Ni-Co-Fe composition provides a lower CTE than many alloys, ensuring superior stability in industrial settings. -
What temperature range is 4J34 effective in?
It maintains low thermal expansion from -40°C to 200°C, ideal for moderate temperature industrial environments. -
Is 4J34 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, with slow speeds recommended for optimal precision. -
How does 4J34 align with industry trends?
It supports the demand for high-precision, thermally stable materials in automation, aerospace, and electronics, driven by smart manufacturing trends.
