Invar Wire


Meeting the Demands of AI Ultra-Power Systems

The ultra-power systems required by AI infrastructure must meet far more than high power consumption. They need high current density, stable power quality, fast response to load changes, and superior thermal management. As power density rises in AI data centers, busbars, cables, and connectors face thermal expansion and deformation. These issues may cause contact failures and electrical instability, disrupting computational continuity. Therefore, in ultra-high-power design, thermal and mechanical stability are now as critical as electrical conductivity.


The Role of Invar in Thermal Expansion Control

Invar, an iron–nickel alloy, is well known for its extremely low coefficient of thermal expansion (CTE). It has long been used in measuring instruments, optical machinery, and precision structural components. In AI power systems, this property is vital. Contact points in busbars, sensor mounts, and power module joints must resist temperature-driven dimensional changes. By minimizing thermal expansion, Invar ensures reliable long-term performance and electrical contact stability.


Advancements in Ultra-High-Strength Invar Wire

Traditional Invar wire offered low thermal expansion but suffered from limited mechanical strength, elongation, and torsion resistance. Our ultra-high-strength Invar wire overcomes these drawbacks:

- Tensile strength: 1,250–1,300 MPa, greatly improving structural durability.

- Torsion strength: Over 120 cycles (vs. ~20 cycles for conventional Invar).

- Elongation: Above 1.8%, reducing breakage risks.

- Manufacturing process: Incorporates advanced cold forging technology for precision and durability.

This innovation makes Invar wire more suitable for AI ultra-power system components operating under harsh and repetitive conditions.


Benefits and Limitations of Ultra-High-Strength Invar Wire

Benefits

- Reduces contact failures during thermal cycles.

- Enhances durability against installation stress and vibration.

- Lowers maintenance costs due to material stability.


Limitations

- Higher material cost due to nickel content.

- Lower electrical conductivity than pure conductors.

- Limited application as large-scale conductors.


Recycling and Domestic Production of Invar

At Dong-A Special Metals, we are committed to resource circulation and recycling. We purchase Invar scrap and reprocess it into raw material. At our Gyeongsan plant, we also produce Invar wire with diameters ranging from 4.3 mm to 3.9 mm. This enables us to support both domestic and global companies, contributing to the advancement of Korea’s materials industry.




#InvarWire #SuperAlloy #AIPowerSystems #LowThermalExpansion #NickelAlloys #PrecisionMaterials #DataCenterSolutions #HighStrengthWire #MetalRecycling #DongASpecialMetals

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Contact Us

Homepage : http://www.dongaspecial.co.kr/

Mobile : +82-10-6367-7392

Company Catalog Download :

1) Eng : https://blog.naver.com/dongaspecial/223683563148

2) Kor : https://blog.naver.com/dongaspecial/223683558947

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Product Brochure Download :

1) Eng : https://blog.naver.com/dongaspecial/223683548933

2) Kor : https://blog.naver.com/dongaspecial/223683546036

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1) sales@dongasepcial.co.kr

2) adenjang@dongasepcial.co.kr

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