We’re proud to offer 4J32 Super Invar Alloy Plate, a game-changer in precision engineering. This nickel-iron-cobalt alloy is all about ultra-low thermal expansion—think near-zero dimensional changes even when temperatures swing. With a composition of 64% iron, 31% nickel, and 5% cobalt, it’s engineered to stay rock-solid in environments where standard materials would warp or shift. Its coefficient of thermal expansion (CTE) is as low as 0.63 × 10⁻⁶/°C, making it one of the most stable materials out there for high-stakes applications.
Our 4J32 Super Invar is crafted with precision, undergoing specialized heat treatments like homogenization at 830°C and stabilization aging to lock in its low CTE and structural integrity. Whether you’re building optical systems, aerospace components, or scientific instruments, this alloy delivers the reliability you need. It’s magnetic below its Curie temperature (279°C) and maintains austenite stability down to -60°C, ensuring performance in extreme conditions. Plus, we provide it in various forms—plates, bars, sheets—to fit your project’s needs.
| 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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The demand for low-thermal- Expansion Alloy s like 4J32 Super Invar is skyrocketing, driven by advancements in aerospace, telecommunications, and precision manufacturing. The global market for precision alloys is expected to grow steadily, fueled by the need for high-accuracy components in satellites, telescopes, and semiconductor equipment. Emerging trends point to additive manufacturing and laser-based fabrication techniques, which are making it easier to produce complex parts with materials like 4J32. However, challenges like machining difficulties and cost remain, pushing companies to innovate in processing and quality control.
Sustainability is also shaping the industry. Manufacturers are under pressure to reduce waste and improve energy efficiency in production. Our commitment to optimized heat treatments and precision machining aligns with these trends, ensuring we deliver high-quality 4J32 Super Invar while keeping costs competitive. The aerospace sector, in particular, is leaning heavily on alloys like ours for lightweight, stable components that can withstand extreme conditions, from cryogenic temperatures to high-heat environments.
Comparison Table
Parameter | 4J32 Super Invar | Standard Invar (FeNi36) | Stainless Steel (AISI 304) |
|---|---|---|---|
Composition | 64% Fe, 31% Ni, 5% Co | 64% Fe, 36% Ni | Fe, 18% Cr, 8% Ni |
CTE (20–100°C) | ~0.63 × 10⁻⁶/°C | ~1.2 × 10⁻⁶/°C | ~17 × 10⁻⁶/°C |
Thermal Stability Range | -60°C to 80°C | -50°C to 100°C | Wide range, less precise |
Density | 8.15 g/cm³ | 8.05 g/cm³ | 8.0 g/cm³ |
Yield Strength | 276 MPa | 260 MPa | 215 MPa |
Tensile Strength | 483 MPa | 450 MPa | 505 MPa |
Corrosion Resistance | Moderate, weak in chloride environments | Moderate, weak in chloride environments | Excellent, ideal for marine use |
Applications | Precision instruments, aerospace | General precision, electronics | General structural, marine |
Our 4J32 Super Invar Alloy Plate shines in applications where dimensional stability is everything. In aerospace, it’s used for structural supports in satellites and composite molds that need to stay precise under thermal stress. Optical systems, like the massive mirrors in telescopes (think Hawaii’s SST Telescope), rely on 4J32 for actuators and sleeves that resist temperature-induced shifts. In electronics, it’s a go-to for precision condenser plates and radar resonant cavities, where even a micron of movement can throw things off.
Scientific instruments, from metrology devices to laser measurement systems, benefit from 4J32’s ability to stay steady across a wide temperature range (-60°C to 80°C). It’s also critical in cryogenic applications, like LNG storage, where its low CTE minimizes contraction. Whether it’s clock pendulums, balance wheels, or high-precision joints, our 4J32 Super Invar ensures performance where others fall short.
Company Comparison and Our Advantages
While other suppliers might offer similar alloys, our 4J32 Super Invar Alloy Plate stands out for a few key reasons. First, our advanced heat treatment process—homogenization, quenching, and stabilization aging—ensures a CTE that’s consistently lower than standard Invar, giving you unmatched dimensional stability. We’ve invested in cutting-edge machining tech to tackle 4J32’s gummy texture, delivering precise components without the usual tool wear headaches. Our ISO 9001 certification backs every batch, so you know you’re getting top-tier quality.
We also prioritize flexibility, offering 4J32 in plates, bars, and custom forms to suit your project. Our 24/7 customer support and expert metallurgists are always on hand to guide you, from design to delivery. Unlike others, we focus on cost-efficiency without cutting corners, keeping your project on budget. With decades of experience in precision alloys, we’re not just a supplier—we’re your partner in pushing the boundaries of what’s possible in precision engineering.
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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 4J32 Super Invar Alloy Plate?
A nickel-iron-cobalt alloy plate with ultra-low thermal expansion, designed for precision engineering where dimensional stability is critical.What makes 4J32 Super Invar unique?
Its coefficient of thermal expansion is nearly zero, offering unmatched stability in extreme temperature ranges (-60°C to 80°C).Where is 4J32 Super Invar used?
In aerospace, optical systems, scientific instruments, and high-precision components like telescope supports and laser systems.How does 4J32 compare to other low-expansion alloys?
It has a lower CTE than standard Invar, with enhanced stability after specific heat treatments, ideal for demanding applications.What are the machining challenges of 4J32?
Its gummy texture requires slow speeds and positive feeds, but our advanced processing ensures high precision.Is 4J32 Super Invar corrosion-resistant?
It offers moderate corrosion resistance, suitable for controlled environments but less ideal for chloride-rich settings.What industries benefit from 4J32 Super Invar?
Aerospace, telecommunications, electronics, and metrology, where precision and stability are non-negotiable.How do we ensure 4J32 quality?
Through rigorous heat treatment, testing, and ISO 9001-certified processes to guarantee performance and reliability.
