SIZEN's Premium Nickel-Iron Alloy: Powering Innovation and Strength

At SIZEN, we specialize in providing premium nickel-iron alloy products designed to meet the evolving needs of industries worldwide. With a strong foundation built on years of experience, we ensure that every alloy we produce reflects our commitment to quality, precision, and innovation. Our dedicated team works tirelessly to deliver reliable solutions tailored to your specific requirements.
SIZEN's nickel-iron alloy stands out for its exceptional strength and durability, designed to perform in the most demanding environments. We focus on leveraging cutting-edge manufacturing technologies to create alloys that offer both consistency and long-term reliability. By choosing SIZEN, you gain a trusted partner that powers your projects with superior materials for sustainable success.
Specifications of Our Nickel-Iron Alloy
4J32 (Super-Invar Alloy)
Standard Dimensions of 4J32
| Form | Thickness / Diameter | Width | Length |
|---|---|---|---|
| 4J32 Expansion Alloy Sheets | 0.3 mm – 5 mm | 100 mm – 1000 mm | 500 mm – 2000 mm |
| 4J32 Expansion Alloy Plates | 5 mm – 50 mm | 200 mm – 1200 mm | 500 mm – 3000 mm |
| 4J32 Expansion Alloy Round Bars | 3 mm – 150 mm diameter | – | 1000 mm – 6000 mm |
| 4J32 Expansion Alloy Flat Bars | 3 mm – 50 mm thickness | 20 mm – 200 mm | 1000 mm – 3000 mm |
| 4J32 Expansion Alloy Wires | 0.1 mm – 10 mm diameter | – | Coil or custom lengths |
| 4J32 Expansion Alloy Tubes | 1 mm – 50 mm outer diameter | – | 500 mm – 3000 mm |
Chemical Composition of 4J32
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 31.0 – 33.0 |
| Iron (Fe) | Balance |
| Cobalt (Co) | 4.5 – 5.5 |
| Manganese (Mn) | 0.80 max |
| Silicon (Si) | 0.30 max |
| Carbon (C) | 0.05 max |
| Phosphorus (P) | 0.020 max |
| Sulfur (S) | 0.020 max |
4J36 (Invar Alloy)
Standard Dimensions of 4J36
| Form | Thickness / Diameter | Width | Length |
|---|---|---|---|
| 4J36 Expansion Alloy Sheets | 0.3 mm – 5 mm | 100 mm – 1000 mm | 500 mm – 2000 mm |
| 4J36 Expansion Alloy Plates | 5 mm – 50 mm | 200 mm – 1200 mm | 500 mm – 3000 mm |
| 4J36 Expansion Alloy Round Bars | 3 mm – 150 mm diameter | – | 1000 mm – 6000 mm |
| 4J36 Expansion Alloy Flat Bars | 3 mm – 50 mm thickness | 20 mm – 200 mm | 1000 mm – 3000 mm |
| 4J36 Expansion Alloy Wires | 0.1 mm – 10 mm diameter | – | Coil or custom lengths |
| 4J36 Expansion Alloy Tubes | 1 mm – 50 mm outer diameter | – | 500 mm – 3000 mm |
Chemical Composition of 4J36
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 35.0 – 37.0 |
| Iron (Fe) | Balance |
| Carbon (C) | 0.05 max |
| Manganese (Mn) | 0.60 max |
| Silicon (Si) | 0.30 max |
| Phosphorus (P) | 0.020 max |
| Sulfur (S) | 0.020 max |
| Chromium (Cr) | 0.25 max |
| Cobalt (Co) | 0.50 max (optional) |
Why Choose SIZEN Nickel-Iron Alloy

Advanced processes ensure consistent quality and reliable alloy performance.

Tailored nickel-iron alloys to meet your specific project requirements.

Rigorous quality control ensures every product meets the highest standards.

Reliable global delivery through a strong, efficient supply chain network.

Eco-friendly manufacturing methods with minimal environmental impact.
5 MAIN REASONS TO CHOOSE US
1
Precision Manufacturing
We employ advanced manufacturing processes to ensure consistent quality and precise composition in every batch, resulting in superior alloy performance and reliability.
2
Customizable Solutions
At SIZEN, we understand that each project is unique. Our nickel-iron alloys can be tailored to meet your specific requirements, ensuring the best fit for your needs.
3
High-Quality Standards
We adhere to the highest industry standards, conducting rigorous quality control checks to guarantee that every alloy product meets the strictest quality benchmarks.
4
Global Reach and Supply Chain Reliability
SIZEN has established a robust supply chain network that ensures reliable delivery of our nickel-iron alloys to clients worldwide, no matter where your operations are located.
5
Sustainable Practices
SIZEN is dedicated to sustainability, utilizing eco-friendly manufacturing methods and sourcing practices that minimize environmental impact without compromising product quality.
Characteristics of Nickel-Iron Alloy

Low Thermal Expansion
Nickel-iron alloys exhibit a remarkably low coefficient of thermal expansion, maintaining dimensional stability even under significant temperature changes. This makes them indispensable for precision instruments and applications requiring high accuracy over a broad temperature range.

Superior Magnetic Properties
These alloys boast exceptional magnetic permeability, making them ideal for applications like transformers, magnetic shielding, and sensors. Their ability to concentrate and guide magnetic fields ensures high efficiency and reliability in electronic and electrical devices.

Corrosion Resistance
Although nickel-iron alloys are not inherently corrosion-proof, they offer better resistance to rusting compared to pure iron. With appropriate surface treatments, such as nickel plating, these alloys can withstand harsher environments, extending their service life significantly.

Thermal Stability
Nickel-iron alloys retain their mechanical properties, such as strength and hardness, even at elevated temperatures. This feature ensures reliable performance in high-temperature environments, making them suitable for aerospace, industrial, and high-tech applications.

Versatile Machinability
Nickel-iron alloys can be processed using specialized machining techniques. They accommodate both hot and cold forming methods, enabling the creation of intricate and complex components. Despite their toughness, these alloys can achieve excellent finishes with proper tools and processes.

Electrical and Thermal Conductivity
The combination of good electrical conductivity and efficient thermal transfer makes nickel-iron alloys ideal for electronic components and heat management systems. Their stable performance ensures consistent energy flow and effective heat dissipation.

High Strength and Durability
Nickel-iron alloys combine impressive mechanical strength with long-term durability, allowing them to withstand significant mechanical stress and repeated use. This resilience makes them highly reliable in demanding industrial and engineering environments.
Diverse Applications
Electronics
Nickel-iron alloys are extensively used in the electronics industry due to their exceptional magnetic properties. These alloys are integral to manufacturing magnetic heads, sensors, transformers, and inductors, which are essential components in modern electronic devices. Their high magnetic permeability makes them ideal for high-frequency inductors and capacitors. Additionally, their magnetic shielding capabilities protect sensitive electronics from interference, while their use in telecommunications systems, including inductive cores and antennas, ensures efficient signal transmission and reception.


Instrumentation
In precision instrumentation, nickel-iron alloys are indispensable for their low thermal expansion and dimensional stability. Alloys like Invar are used in optical and laser systems, where even minor dimensional changes can disrupt performance. Furthermore, these alloys are employed in scientific instruments such as magnetometers and gaussmeters, where their stable magnetic properties and low noise characteristics enable accurate detection and measurement of magnetic fields.
Aerospace and Defense
The aerospace and defense industries rely on nickel-iron alloys for their high-temperature resistance, durability, and reliability under extreme conditions. These alloys are used in jet engine components, spacecraft parts, and other high-temperature environments. They are also critical in sensors, actuators, and navigation systems, where robustness and resistance to harsh environmental conditions are paramount for mission-critical operations.


Mechanical Engineering
Nickel-iron alloys have broad applications in mechanical engineering due to their strength and precision properties. They are utilized in manufacturing precision parts like magnetic scales and springs, as well as high-temperature components required in challenging environments. These alloys combine mechanical resilience with excellent magnetic and thermal properties, making them a preferred choice for demanding mechanical applications.
Automotive Industry
In the automotive sector, nickel-iron alloys are valued for their low thermal expansion and durability. They enhance the performance and longevity of critical components such as engines, braking systems, and exhaust systems. The stability these alloys provide helps maintain the functionality of automotive parts under varying temperatures and mechanical stresses.


Chemical Industry
Nickel-iron alloys are essential in the chemical industry for their resistance to corrosion and thermal stability in harsh environments. They are commonly used to manufacture reactors and catalysts in high-temperature and chemically aggressive processes, as well as equipment for petroleum refining. Their robustness ensures reliability and efficiency in demanding chemical operations.
Electrical Equipment
In electrical equipment, nickel-iron alloys are used to produce components requiring high stability and durability, such as connectors, temperature regulators, and LED packaging. These alloys are also critical in transformer cores, where they facilitate efficient energy transfer while minimizing energy loss. Their unique combination of electrical and magnetic properties ensures optimal performance in electrical applications.


Frequently Asked Questions About Nickel-Iron Alloy
What is nickel-iron alloy composed of?


Nickel-iron alloy is primarily made of nickel and iron, with nickel typically comprising a significant percentage of the composition. The specific ratio of nickel to iron can vary depending on the intended use, and sometimes trace elements like cobalt or manganese are added to enhance certain properties.
How is nickel-iron alloy manufactured?


Nickel-iron alloys are produced through a melting and refining process where precise amounts of nickel and iron are combined in a furnace. The alloy is then cast, rolled, or otherwise processed into the desired form, such as sheets, rods, or wires, depending on the application. Advanced techniques like vacuum melting are used to achieve high purity and uniformity.
What are the common types of nickel-iron alloys?


Common types of nickel-iron alloys include Invar, which has a low coefficient of thermal expansion, and Permalloy, known for its high magnetic permeability. Other variations may have different compositions tailored for specific thermal, magnetic, or mechanical requirements.
Are nickel-iron alloys environmentally friendly?


Nickel-iron alloys are considered relatively environmentally friendly as they are recyclable and can be reused in various applications. However, their environmental impact depends on the production processes and how they are managed at the end of their life cycle.
Is nickel-iron alloy ductile or brittle?


Nickel-iron alloys are generally ductile, making them easy to shape and form during manufacturing. Their ductility depends on the alloy's specific composition and treatment processes, such as annealing.
Can nickel-iron alloys be plated or coated?


Yes, nickel-iron alloys can be plated or coated with materials like chromium, zinc, or gold to enhance their corrosion resistance, wear resistance, or electrical conductivity.
How is nickel-iron alloy different from stainless steel?


While both materials may contain iron and nickel, nickel-iron alloys typically have a higher nickel content and are optimized for specific properties like magnetic permeability or low thermal expansion. Stainless steel, on the other hand, is designed for high corrosion resistance and mechanical strength.
How does heat treatment affect nickel-iron alloys?


Heat treatment can significantly influence the properties of nickel-iron alloys, such as their magnetic and mechanical characteristics. For example, annealing can improve ductility and reduce internal stresses, while specific treatments can enhance magnetic permeability.
Can nickel-iron alloy be machined easily?


Yes, nickel-iron alloys are generally machinable, but the process can be more challenging compared to standard steel due to their toughness and work-hardening characteristics. Using appropriate cutting tools and cooling methods ensures better results.
Is nickel-iron alloy toxic?


Nickel-iron alloys are generally not considered toxic in their solid form. However, precautions should be taken when handling fine particles or dust from machining processes, as inhaling or prolonged skin contact with nickel-containing materials may cause irritation or allergic reactions in sensitive individuals.
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