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Views: 2000 Author: Ruan KeLi Publish Time: 2026-07-03 Origin: Site
Core loss (iron loss) is the most critical index for transformer silicon steel quality. We adopted the unified international Epstein test standard, testing mainstream 27QG series grain-oriented silicon steel from five brands under 1T magnetic flux density and 50Hz industrial frequency. The verified practical test data reflects real performance differences after lamination assembly.
Baosteel Hi-B grain-oriented silicon steel represents China’s top-level electrical steel technology. The tested core loss of Baosteel B27QG120 is stably controlled at 1.0–1.1 W/kg @1T, far lower than the national and industrial standard requirements. Its magnetic permeability is the highest among domestic brands, with extremely low hysteresis loss and eddy current loss. The batch performance consistency is excellent, with almost no performance deviation between different production batches. It is the best choice for high-efficiency, low-noise, and ultra-energy-saving transformer projects.
Wugang has mature production technology for oriented silicon steel. The test core loss of its 27QG series material ranges from 1.15–1.25 W/kg @1T. The overall magnetic stability is good, with uniform thickness and stable coating adhesion. Although the low-loss performance is slightly inferior to Baosteel, its quality fluctuation is small, and the yield rate in transformer core lamination is high. It is a cost-effective high-end alternative to Baosteel materials.
Ansteel silicon steel features balanced magnetic performance and stable mechanical properties. The 27QG series test core loss is 1.20–1.30 W/kg @1T. Its structural rigidity is good, and the material flatness is excellent, which is friendly to large-scale automatic lamination production. The slight disadvantage is that the individual batch has tiny magnetic deviation, which is acceptable for conventional industrial and distribution transformers.
Magang and Shagang focus on cost-effective industrial-grade electrical steel. The tested core loss of their mainstream oriented silicon steel ranges from 1.30–1.45 W/kg @1T. The basic magnetic performance meets national standard requirements, fully satisfying ordinary power distribution transformers and low-load electrical equipment. The performance fluctuation is slightly larger than the above three high-end brands, but the cost advantage is prominent.
Baosteel > Wugang > Ansteel > Magang ≈ Shagang. Baosteel adopts the most advanced 20-high rolling mill and precise high-temperature annealing process, achieving zero batch difference in magnetic performance. Wugang and Ansteel have stable batch consistency, suitable for high-standard export orders. Magang and Shagang perform well in conventional standard batches but have relatively obvious performance differences in ultra-thin and high-precision specifications.
Baosteel and Wugang silicon steel adopt high-temperature resistant organic/inorganic composite coating, with strong adhesion, scratch resistance, and excellent interlayer insulation, effectively reducing eddy current loss. Ansteel coating is stable and durable. Magang and Shagang use standard industrial coatings, which meet basic insulation requirements but are less resistant to high temperature and friction during processing.
Baosteel and Wugang materials have ultra-high flatness and uniform thickness tolerance, which can realize zero-gap lamination and minimize assembly additional loss. Ansteel has good flatness. Magang and Shagang have acceptable flatness for conventional assembly, but ultra-precision customized cores need strict screening during production.
Due to ultra-low core loss and uniform magnetic circuit, Baosteel silicon steel cores have the lowest operating noise. Wugang and Ansteel follow with stable low-noise operation. Magang and Shagang cores have slightly higher electromagnetic vibration and noise, which is completely acceptable for ordinary civil and industrial transformers.
The price difference of the five major silicon steel brands is directly linked to their test performance and process precision, forming a clear market gradient:
Price Ranking: Baosteel > Wugang > Ansteel > Magang > Shagang
Baosteel: Premium pricing, the highest cost performance for high-end export, ultra-energy-saving, and special engineering projects, reducing long-term operation electricity costs significantly.
Wugang: Mid-to-high price, close to Baosteel in quality, the best alternative for cost-sensitive high-standard export orders.
Ansteel: Medium price, balanced quality and cost, suitable for mass production of conventional high-quality transformers.
Magang & Shagang: Economic pricing, lowest procurement cost, ideal for conventional civil power distribution and low-budget industrial projects.
Your projects require ultra-low loss, high energy efficiency, long service life, and strict international standards (IEC/ISO). Suitable for European, American, and high-end Southeast Asian grid projects, new energy power generation supporting transformers, and precision power supply equipment.
You need balanced quality and cost, stable batch consistency, and qualified export-grade products. Perfect for most industrial transformers, commercial power distribution equipment, and regular overseas export orders.
For conventional standard transformers, civil power distribution projects, and cost-sensitive bulk orders. The material meets national and basic international standards, ensuring qualified and stable basic performance with optimal procurement cost.
As a professional export transformer core manufacturer, we support customized brand material matching according to customer project budgets and performance requirements. Whether customers choose Baosteel ultra-low loss materials or cost-effective domestic brands, we implement unified precision laser cutting, standardized lamination assembly, and strict factory testing. All finished cores undergo core loss testing under 1T/50Hz to ensure the final product performance exceeds industry assembly standards.
Matched with our export-grade moisture-proof, anti-rust, and reinforced wooden box packaging, all silicon steel cores can maintain stable performance during long-distance sea transportation, providing global customers with high-quality, cost-matched transformer core solutions.
We provide professional silicon steel brand selection consultation, customized transformer core production, and full set of test reports. Welcome to send your project parameters and budget requirements to get the most suitable low-loss transformer core solution and accurate quotation!
