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6 Common Silicon Steel Materials for Transformer Cores

Views: 0 Author: Site Editor Publish Time: 2026-03-01 Origin: Site

Introduction

As a professional manufacturer of silicon steel sheet cores (such as EI silicon steel sheets and toroidal cores), we have rich experience in applying high-quality silicon steel to transformer core production. Silicon steel (electrical steel) is the core material of transformer cores, directly determining the efficiency, energy loss and service life of transformers. It is mainly divided into Non-Grain Oriented (CRNGO) and Grain Oriented (CRGO) silicon steel, with obvious differences in structure and application. Below are the top 6 commonly used silicon steel grades for transformers, with references to Baosteel standards, and our core products perfectly match these grades.

Key Differences Between Oriented and Non-Oriented Silicon Steel

The key difference lies in the grain arrangement and magnetic properties, which determine their applicable scenarios:

Non-Grain Oriented Silicon Steel (CRNGO): Grains are randomly arranged, with uniform magnetic properties in all directions. It has good stamping performance and cost-effectiveness, but slightly higher core loss. Suitable for small and medium-sized transformers, such as distribution transformers, where our EI silicon steel sheet cores and toroidal cores are widely used.
Grain Oriented Silicon Steel (CRGO): Grains are arranged in the rolling direction, with high magnetic permeability and ultra-low core loss. It is not easy to stamp but has excellent energy-saving performance, suitable for large power transformers and high-voltage transformers, which matches our high-efficiency toroidal cores and power transformer cores.

6 Common Baosteel Silicon Steel Grades for Transformer Cores (with Core Application)

Baosteel Grade	Type	Thickness (mm)	Max.Core Loss (W/kg)	Applicable Transformer Core	Product Category
B50A800	Non-Oriented	0.50	≤8.0	EI silicon steel sheet cores, general distribution transformer cores	General Purpose Electrical Steel
B50A470	Non-Oriented	0.50	≤6.0	High-efficiency EI cores, small dry-type transformer cores	High-efficiency Electrical Steel
B35A440	Non-Oriented	0.35	≤4.7	Toroidal cores, medium-high frequency transformer cores	High-frequency Electrical Steel
B30G120	Oriented	0.30	≤1.20	10-35kV distribution transformer cores,toroidal cores	Oriented Electrical Steel
B27G120	Oriented	0.27	≤1.20	Energy-saving transformer cores, EI silicon steel sheet cores	Energy-saving Oriented Steel
B23G110	Oriented	0.27	≤1.10	35-110kV power transformer cores, toroidal cores	High-grade Oriented Steel

Above data is sourced from Baosteel Official Website, all specifications comply with Baosteel electrical steel product standards, ensuring high quality and reliability.

Our Silicon Steel Sheet Core Products

We specialize in producing high-quality silicon steel sheet cores, including EI silicon steel sheets and toroidal cores, which are fully compatible with the above 6 silicon steel grades. All our cores are made of premium silicon steel (referenced to Baosteel standards) to ensurelow energy loss and stable performance for transformers. For more details about our core products, please contact us directly.