HIGH-QUALITY CORES
FOR YOUR TRANSFORMERS

More than 15 years of industry experience, from coils to cores,
providing high-quality products and services

SILICON STEEL COILS

Mill Brand:	Shougang/BaoWisco/Private Mill
Steel Type:	HiB/CGO/Laser/Non-laser
Grade:	18/60 - 30/120
Slit Coil Width:	10-1250mm
Width Accuracy:	-0.1-0mm
Burr:	≤0.02mm
Edge Camber:	≤0.1/2000mm
Surface Deviation:	±0.1mm

TRANSFORMER CORES

NLL/NLC/Noise:	Customized
Maximum Weight:	40T
Curvature Tolerance:	≤(1.5/1000)mm
Verticality Tolerance:	≤(2.0/1000)mm
Gap Tolerance at the Joint:	<0.5mm
Ground Insulation Resistance:	≥ 200 MΩ
Total Stack Thickness Tolerance:	±0.5 mm
Total Stack Thickness Tolerance:	±0.2 mm

CUT LAMINATIONS

Maximum Width:	840mm
Maximum Length:	4500mm
Angle Accuracy:	≤0.005°
Length Accuracy:	-0.1-0mm

Advanced production equipment

We have established a long-term cooperative relationship with Xi'an Qiyuan (SDRI), a leading domestic professional equipment manufacturer, and have continuously introduced advanced equipment and acquired the ability to upgrade and transform the equipment. In addition, the company also pays attention to and introduces advanced foreign technology and equipment to continuously improve our production capacity.

Advanced technology research and development

Tianli Iron Core is a long-term strategic partner of Shougang Group. We jointly discuss technical issues and establish a technical test base. At the same time, the company has established industry-university-research cooperation with well-known universities such as Shanghai Jiao Tong University, Northeastern University and Suzhou University to jointly explore and develop new technologies and products.

Our Service Capabilities

We are one of the leading transformer core manufacturers in China, serving more than 150 customers worldwide.

Number of professionals

Years in the industry

Annual production tons

Global Customers

Tianli Iron Core excels in manufacturing high-capacity, long-life transformer cores, standing at the forefront of domestic technological advancements. The company has introduced pioneering features such as overvoltage protection for cores, a full-slant longitudinal seven-step lamination process, and large-section yoke designs. These innovations significantly enhance resistance to overload impacts, improve overexcitation capabilities, and boost seismic durability. Their products have played pivotal roles in notable projects including those for the Beijing 2022 Winter Olympics, 2022 Winter Paralympics, and offshore wind power installations. With a commitment to technological R&D and process refinement, Tianli boasts over 30 patents related to core technologies.

News and events

ELECS KOREA 2025

Coex Hall A-624, Seoul Korea, welcome to visit us

EP Shanghai 2024, China

N4-3S47, Shanghai New lnternational Expo Center, welcome to visit us

PowerEX Asia 2024, Thailand

No.61, BITEC, Bangkok, welcome to visit us

Enlit Asia 2024, Malaysia

Q26, MITEC, Kuala Lumpur, welcome to visit us

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HIGH-QUALITY CORESFOR YOUR TRANSFORMERS