Welcome to Jiangsu DLX alloy Co., Ltd.
Email:sales8@dlx-alloy.com Mobile/Whatsapp:+86 199 0611 9641
Specialized manufacturer of high temperature alloys, precision alloys and Incoloy,over 20 years.
Whatsapp:+86 199 0611 9641
Email:sales8@dlx-alloy.com
Add:NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu,China
Precision Alloy Wire
Product Details

Precision Alloy 4J33 4J34 Nichrome Series is an exceptional choice for high-performance electrical applications that require precise resistance control and high durability. Known for their excellent electrical resistivity and mechanical properties, 4J33 and 4J34 precision alloys are widely used in manufacturing electrical wires, heating elements, and various electronic components. These alloys are specifically engineered for industries where reliability, efficiency, and long service life are crucial.
Outstanding Electrical Resistivity
The 4J33 and 4J34 alloys are specifically designed for high electrical resistivity, making them ideal for use in applications such as heating elements, resistors, and thermocouples. These materials offer stable electrical resistance, which is essential for accurate and consistent performance in electrical circuits.
High-Temperature Stability
One of the key benefits of 4J33 and 4J34 alloys is their ability to perform consistently at high temperatures. These alloys are able to withstand heat up to 1,000°C (1,832°F), ensuring that they maintain their mechanical and electrical properties even in the most demanding environments.
Corrosion and Oxidation Resistance
4J33 and 4J34 alloys have excellent resistance to oxidation and corrosion, particularly in high-temperature and harsh environments. This resistance ensures that the alloys have a long service life and remain functional in environments prone to corrosive elements.
Mechanical Strength
With impressive mechanical strength, these alloys can withstand substantial mechanical stress, making them reliable for use in high-stress applications such as in industrial furnaces or electrical components that require both high heat and mechanical durability.
Versatile Fabrication
4J33 and 4J34 precision alloys are easy to process and fabricate, making them suitable for a wide variety of applications. The alloys can be drawn into wires, rods, and coils and are suitable for various industrial manufacturing processes.


Parameter | 4J33 Ni-Co | 4J06 Fe-Ni-Cr | Standard Fe-Ni (Invar) |
|---|---|---|---|
Composition | 35% Ni, 17% Co, 48% Fe | 42% Ni, 6% Cr, 52% Fe | 36% Ni, 64% Fe |
CTE (ppm/°C, 20-450°C) | ~4.7 | ~5.9 | ~1.2–1.5 |
Temperature Range | -40°C to 450°C | -40°C to 400°C | -50°C to 230°C |
Curie Temperature | ~430°C | ~370°C | ~279°C |
Yield Strength (MPa) | ~340 | ~350 | ~260–300 |
Tensile Strength (MPa) | ~520 | ~550 | ~450–550 |
Density (g/cm³) | 8.27 | 8.15 | 8.05 |
Applications | Semiconductor packaging, vacuum tubes | Automotive sensors, spark plug seals | Precision instruments, thermostats |
Oxidation Resistance | Excellent | Excellent | Moderate |
Applications of 4J33 and 4J34 Precision Alloys
Heating Elements
These alloys are commonly used in heating elements for electrical appliances such as toasters, ovens, and industrial heating systems. Their ability to handle high temperatures and maintain stable electrical resistance makes them ideal for heating applications.
Resistors and Thermocouples
The high electrical resistivity of 4J33 and 4J34 alloys makes them perfect for use in resistors and thermocouples. These alloys help maintain precise control of electrical current, making them indispensable in various electronic applications.
Aerospace and Automotive Industries
In aerospace and automotive applications, these alloys are used in components that need to withstand extreme conditions. From heating systems in aircraft to electrical components in cars, 4J33 and 4J34 alloys ensure high performance and longevity.
Power Generation
These alloys are often found in power generation components, such as electrical contacts and heating elements, where high-temperature resistance and electrical stability are critical.
Electronics Manufacturing
In the electronics industry, 4J33 and 4J34 alloys are widely used in the production of electrical connectors, resistors, and other critical components that require reliable and long-lasting performance.

Superior Durability
Due to their strong resistance to oxidation and high-temperature performance, 4J33 and 4J34 alloys offer long-lasting durability in demanding applications. This reduces maintenance costs and improves the efficiency of electrical devices.
Stable Electrical Performance
The alloys' ability to maintain stable electrical resistivity over time makes them perfect for applications requiring consistent and reliable electrical performance, even in fluctuating conditions.
Enhanced Safety
The superior mechanical properties and thermal stability of these alloys contribute to the overall safety and reliability of the equipment in which they are used. This is especially important in high-risk applications like power generation and aerospace.
Cost-Effective for High-Performance Applications
Although the initial cost of 4J33 and 4J34 alloys may be higher, their longevity and ability to function reliably under extreme conditions make them a cost-effective solution over the long term, especially for industries with high-performance standards.
The manufacturing of 4J33 and 4J34 alloys follows advanced metallurgical processes, ensuring precise control over their composition. These alloys undergo strict quality control measures during production to guarantee consistent electrical resistivity, high strength, and reliable thermal performance. After the alloys are produced, they are carefully processed into wires, rods, and coils, which are then tested for quality before being shipped.

We ensure that all our 4J33 and 4J34 alloys are packaged securely to prevent any damage during transit. Our packaging is designed to handle the specific needs of each product type, and we provide flexible shipping options to meet the timelines of our clients. Please contact us for specific packaging details and shipping lead times.



CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got ISO9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, Precision Alloy , FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.



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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FAQ
Q1: What are 4J33 and 4J34 alloys made of?
A1: 4J33 and 4J34 are precision alloys made primarily of nickel, chromium, and iron, designed to offer high electrical resistivity and excellent high-temperature performance.
Q2: What are the main uses of 4J33 and 4J34 alloys?
A2: These alloys are used in a wide range of electrical applications, including heating elements, resistors, thermocouples, power generation, and electronics manufacturing.
Q3: Can 4J33 and 4J34 alloys withstand high temperatures?
A3: Yes, these alloys are capable of withstanding temperatures up to 1,000°C (1,832°F) without losing their electrical or mechanical properties, making them ideal for high-temperature applications.
Q4: Are samples available for testing?
A4: Yes, we offer free samples for testing, with the buyer responsible for covering the shipping costs.
Q5: What is the lead time for ordering 4J33 or 4J34 alloys?
A5: The sample lead time is typically 7 days after payment confirmation. For bulk orders, lead times may vary based on the order quantity.
Q6: How can I contact you for more information?
A6: You can contact us by email or phone during our working hours, Monday to Saturday from 7:30 AM to 5:00 PM (Beijing Time, GMT+08:00). Feel free to reach out if you need further information or have any specific questions.
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