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ASTM Standard Silicon Steel Coils Help Upgrade Energy Efficiency in North American Motors and Transformers

With North America ramping up its investments in electrification, clean energy, EV production and data center space, the need for high-performance electrical steel is stronger than ever. ASTM standard silicon steel coils are increasingly being used to enhance energy efficiency, minimize core loss and improve magnetic performance in motors and transformers throughout the region.

ASTM electrical steel provides a high-quality option for producers looking to meet the technical requirements of the US and Canada, offering consistent quality, dependable magnetic properties, and long-term performance in use.

What is the Selection and Application of ASTM Standard Silicon Steel?

Silicon steel coil, also known as electrical steel, is an alloy steel with silicon (normally 0.5%-4.5%) added to enhance its magnetic permeability and reduce hysteresis loss. The laminated cores of motors, generators, and transformers are the most common applications.

Electrical steel is produced and available in North America to the following:

ASTM A677 / A677M – Cold-Rolled Non-Oriented Electrical Steel
ASTM A683 / A683M – Cold-Rolled Grain-Oriented Electrical Steel

These standards establish the magnetic characteristics, thickness tolerance, insulation coating and core loss performance to comply with strict efficiency standards.

Non Oriented Electrical Steel (NOES) Coil

Standard: ASTM A677 / A677M

Non-oriented silicon steel has equal magnetic properties in any direction, so it is used for rotating electric machinery such as motors and generators.

Typical Hot-Selling Grades
M150-35A5
M230-35A5
M300-50A5

Focus Markets of The Application in North America
Industrial motors
High efficiency IE3/IE4 motors
New energy vehicle (NEV) drive motors
Household appliance motor
HVAC and compressors

Advantages of the Performance
Reduced core loss and higher motor efficiency
High magnetic permeability
Good punching and laminating property
Uniform coating adhesion and service life stability

With EV production and industrial automation booming in the U.S. and Mexico, M Type ASTM A677 grades, including M150-35A5 and M230-35A5, are gaining more and more popularity in manufacturing energy saving motor core.

Grain-Oriented Silicon Steel (GOES) Coils

Standard: ASTM A683 / A683M

Grain-oriented silicon steel undergoes a special process to align its crystal structure along the rolling direction, significantly improving its unidirectional magnetic properties. It is primarily used in stationary machinery, such as transformers.

Best-Selling Grades
M4
M5
M6

Main Applications
Distribution Transformers
Power Transformers
Data Center Transformers
Smart Grid Equipment
Utility Substations

Core Advantages
Ultra-low iron loss
High magnetic flux density
Reduced energy loss during transmission
Improved transformer operating efficiency

With the rapid development of renewable energy grids and hyperscale data centers in North America, high-grade ASTM A683 materials such as M4 and M5 remain crucial for reducing energy loss and improving transformer reliability.

Driving Energy Efficiency Across North America

Energy efficiency regulations, including DOE motor standards and transformer efficiency requirements, are pushing manufacturers toward higher-performance electrical steel. ASTM silicon steel coils provide:

Lower operating temperatures
Reduced electricity consumption
Improved equipment lifespan
Compliance with North American technical standards

From electric vehicle drive systems to large-scale utility transformers, electrical steel remains a core material for sustainable infrastructure development.

Royal Steel Group: Global Electrical Steel Supply Solutions

In addition to silicon steel coils conforming to ASTM standards, Royal Steel Group supplies a full range of international electrical steel grades, including popular grades sold globally:

IEC – Non-oriented and oriented silicon steel: M210-35A, M270-50A, M330-50A
JIS (Japan) – SPCC-NO, SPCC-GO, M210
GB/T (China) – 50W350, 30W300, 35W250
EN (Europe) – M300-50A, M400-50A, M500-50A

We offer non-oriented and oriented silicon steel coils in various thicknesses, coating types, and magnetic property grades, ensuring solutions for motors, transformers, and power equipment in North America, Europe, and Asia.

With stable supply capabilities, strict quality control, and extensive export experience, Royal Steel Group is committed to providing energy-efficient electrical steel solutions to power the future.

 

Contact us for more details
Phone/WhatsApp: +86 136 5209 1506
E-mail: sales01@royalsteelgroup.com
Website: https://www.royalsteelgroup.com

 

ROYAL GROUP

Address

Kangsheng development industry zone,
Wuqing district, Tianjin city, China.

E-mail

sales01@royalsteelgroup.com

Phone

Sales Manager: +8613652091506

Hours

Monday-Sunday: 24-hour Service

Post time: Feb-24-2026