What Steel is Used for Transformers?

Transformers are essential components in power distribution systems, and their efficiency depends heavily on the quality of core materials. Cold-rolled grain oriented steel (CRGO steel) has emerged as the industry standard for transformer manufacturing due to its superior magnetic properties and energy efficiency.

Understanding CRGO Steel for Transformers

CRGO steel, also known as silicon steel for transformers, is specifically engineered to minimize energy losses during magnetic flux transfer. This grain oriented steel features a unique crystalline structure where grains are aligned in a single direction, dramatically reducing core losses and improving transformer performance.

The manufacturing process of cold-rolled grain oriented steel involves precise control of silicon content (typically 3-4%) and specialized heat treatment. This results in material with exceptional magnetic permeability in the rolling direction, making it ideal for CRGO core transformers.

HiB Steel: The Premium Choice

HiB (High Magnetic Induction) represents the next generation of silicon steel technology. HiB steel offers even lower core losses compared to conventional CRGO materials, achieving permeability levels up to 1.90-1.95T. This advanced grain oriented steel enables transformer manufacturers to design more compact, efficient units.

Modern HiB transformer cores can reduce no-load losses by 15-20% compared to standard grades, translating to significant energy savings over the transformer's operational lifetime.

Silicon Steel Types and Applications

Silicon steel for transformers comes in various grades to suit different applications:

• CRGO steel (0.23mm-0.30mm thickness) - Standard power transformers

• HiB grades - High-efficiency distribution transformers

• Domain-refined silicon steel - Large power transformers requiring ultra-low losses

Why CRGO Core Transformers Lead the Market

CRGO core transformers dominate the electrical industry because cold-rolled grain oriented steel delivers unmatched performance. The directional magnetic properties of grain oriented steel allow for optimal flux path design, while the high silicon content provides excellent electrical resistivity.

When selecting silicon steel for transformer applications, manufacturers prioritize low core loss, high permeability, and consistent quality. Our CRGO steel products meet international standards including IEC 60404-8-7 and ASTM A876, ensuring reliable performance across diverse operating conditions.

The Future of Transformer Steel

Innovation continues in silicon steel for transformer production. Advanced HiB technologies and laser-scribing techniques are pushing the boundaries of efficiency. As global energy demands increase, the role of high-performance grain oriented steel becomes even more critical in building sustainable power infrastructure.

For more information about Jiangsu Beichen Hubang Electric Power Co., Ltd. (founded in 2007), its subsidiary Huacheng Electrical Steel Co., Ltd. (founded in 2016)– dedicated to electrical steel and transformer core manufacturing), and the international transformer brand SYNO-ELECTRIC, please visit our official website or contact our global sales team. We remain committed to delivering premium power equipment and tailored solutions, forging long-term partnerships with clients worldwide to drive sustainable development in the energy industry.

For more information on our CRGO steel、high-grade electrical steel products or to request a quote, visit our product page.For more information,visithttps://www.synoelectric.com/.Follow us on Linkedln.