Our 4J32 Super Invar Alloy Tube is a game-changer for precision devices, offering ultra-low thermal expansion for unmatched stability. With 31% nickel, 5% cobalt, and 64% iron, it delivers a CTE of ~0.35–0.63 ppm/°C (20-100°C), keeping components steady in even the most demanding conditions. It’s tough, corrosion-resistant, and easy to machine, making it perfect for high-accuracy applications. Whether you’re building telescope actuators or cryogenic systems, our 4J32 tube ensures top-tier performance.

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The precision device market is booming, with a projected CAGR of 6.2% through 2032, driven by aerospace, optics, and electronics advancements. As devices get smaller and more precise, materials with ultra-low thermal expansion are critical. Aerospace relies on them for optical systems and sensors, while electronics demand stability in miniaturized components. The rise of advanced optics and cryogenic applications is pushing the need for alloys like our 4J32, which offers exceptional dimensional stability for cutting-edge technology.

Applications

Our 4J32 Super Invar Alloy Tube is a go-to for precision applications. It’s used in telescope actuators for observatories, ensuring pinpoint accuracy despite temperature shifts. Precision sensors and optical mounts rely on its stability to maintain alignment in optical systems. Cryogenic systems, like those in LNG storage or space technology, benefit from its performance at low temperatures. You’ll also find it in scientific instruments, such as laser components and seismic gauges, where its ultra-low CTE delivers unmatched reliability.

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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We know the market offers plenty of alloy options, but our 4J32 Super Invar Alloy Tube stands out for its precision and quality. Our strict quality control ensures a consistent CTE and robust mechanical properties (yield strength ~276 MPa, tensile strength ~483 MPa). We provide customized tube sizes and forms to meet your exact specs, with faster delivery than many alternatives. Our efficient production process keeps costs low without sacrificing performance, and our alloy’s ultra-low thermal expansion gives it an edge in high-precision applications. With years of expertise, we’re your trusted partner for advanced alloy solutions.

Comparison Table: 4J32 Super Invar vs. Invar 4J36 vs. Alloy 42 (4J42)

Parameter	4J32 Super Invar	Invar 4J36	Alloy 42 (4J42)
Composition	31% Ni, 5% Co, 64% Fe	36% Ni, 64% Fe	42% Ni, 58% Fe
CTE (ppm/°C, 20-100°C)	~0.35–0.63	~1.2–1.5	~4.0–4.7 (20-300°C)
Temperature Range	-32°C to 100°C	-50°C to 230°C	-40°C to 300°C
Curie Temperature	~220°C	~279°C	~370°C
Yield Strength (MPa)	~276	~260–300	~310
Tensile Strength (MPa)	~483	~450–550	~520
Density (g/cm³)	8.15	8.05	8.12
Applications	Telescope actuators, optical mounts	Aerospace tooling, composite molds	Semiconductor lead frames, seals
Corrosion Resistance	Good	Moderate	Good

Our 4J32 Super Invar Alloy Tube is built for precision devices that demand the ultimate in thermal stability. Its ultra-low CTE, durability, and corrosion resistance make it ideal for telescope actuators, optical mounts, and cryogenic systems. Whether you’re in aerospace, optics, or scientific instrumentation, our tube ensures your components perform flawlessly. Contact us today to see how 4J32 can elevate your precision projects!

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

1. What is 4J32 Super Invar Alloy Tube?
   It’s a nickel-iron-cobalt alloy tube with ultra-low thermal expansion, designed for precision devices requiring exceptional dimensional stability.

2. What are the key properties of 4J32?
   It offers a CTE of ~0.35–0.63 ppm/°C (20-100°C), high corrosion resistance, and excellent mechanical strength, ideal for precision applications.

3. What industries use 4J32 Alloy Tube?
   Aerospace, optical engineering, electronics, and scientific instrumentation rely on it for thermally stable components.

4. What are common applications for 4J32?
   It’s used in telescope actuators, precision sensors, optical mounts, and cryogenic systems needing minimal thermal expansion.

5. How does 4J32 compare to other low- Expansion Alloy s?
   Its 31% nickel and 5% cobalt composition provides a lower CTE than most alloys, ensuring superior stability in precision devices.

6. What temperature range is 4J32 effective in?
   It maintains ultra-low thermal expansion from -32°C to 100°C, perfect for sensitive precision environments.

7. Is 4J32 weldable or machinable?
   Yes, it’s weldable and machinable with standard techniques, though slow speeds and precise tooling are recommended for best results.

8. How does 4J32 align with industry trends?
   It supports the growing need for ultra-precise, thermally stable materials in aerospace, optics, and electronics, driven by miniaturization and high-accuracy demands.