ASTM Standard A726 Cold Rolled Grain-Oriented Electrical Silicon Steel(GOES) Coil

Short Description:

ASTM A726 Silicon Steel Coil refers to High Magnetic Permeability Grain-Oriented Electrical Steel (GOES) used primarily in transformer core manufacturing.

Standard: ASTM

Thickness: 0.23mm-0.30mm

Width: 600mm-1200mm

Length: Coil Or As Required

Supply Ability: 5000 tons Per Month

Process: Coll Rolled

Delivery Time: In stock or 10-25 working days

Payment Term: 30% T/T Advance + 70% Balance

Certificate: ISO

Send email to us WhatsApp

Product Detail

Product Tags

Product Detail

General Information

Item	Description
Product Name	ASTM A726 Silicon Steel Coil
Steel Type	GOES
Manufacturing Process	Cold-Rolled Grain-Oriented (CRGO)
Standard	ASTM A726 / A726M
Application Frequency	50 / 60 Hz

Chemical Composition (Typical)

Element	Content
Silicon (Si)	2.8 – 3.5 %
Carbon (C)	≤ 0.005 %
Sulfur (S)	Strictly controlled
Nitrogen (N)	Strictly controlled
Iron (Fe)	Balance

Physical & Magnetic Properties

Property	Description
Grain Orientation	Highly oriented along rolling direction (Hi-B GOES)
Core Loss	Very low, optimized for high-efficiency transformer cores
Magnetic Permeability	Excellent along rolling direction
Magnetic Induction	High, suitable for low-loss power transformers
Performance Stability	Stable under long-term continuous operation and varying loads

Available Thickness

Thickness (mm)	Typical Application
0.18 – 0.20	Small power transformers, distribution transformers
0.23 – 0.27	Medium power transformers, industrial transformers
0.30 – 0.35	Large power transformers, high-efficiency transformers

ASTM A726 Silicon Steel Coil Size

Trademark (Reference)	Nominal Thickness (mm)	Density (kg/dm³)	Typical Core Loss W/kg (1.7T / 50Hz)	Minimum Magnetic Induction B50 (T)	Minimum Stacking Coefficient (%)
A726-230	0.23	7.65	0.50	≥ 1.92	≥ 96.5
A726-270	0.27	7.65	0.55	≥ 1.93	≥ 96.0
A726-300	0.30	7.65	0.60	≥ 1.94	≥ 95.5
A726-330	0.33	7.65	0.65	≥ 1.94	≥ 95.0
A726-350	0.35	7.65	0.70	≥ 1.95	≥ 94.5

ASTM A726 Silicon Steel Coil Customized Content

Customization Category	Available Options	Description / Notes
Dimensions	Thickness, width, coil weight	Thickness: 0.23 / 0.27 / 0.30 / 0.33 / 0.35 mm; Width: 500–1,250 mm; Coil weight: 3–10 MT or as required
Magnetic Grade	Core loss levels (W/kg), B50 induction	Hi-B GOES magnetic grades customized for power transformers, distribution transformers, and high-efficiency applications
Processing	Slitting, cut-to-length, edge trimming, stress relief annealing	Coils can be slit into narrow strips or cut into sheets for transformer core lamination; optional annealing for stress relief
Surface Insulation	C5, C6 insulation coatings	High-quality coatings improve interlaminar resistance, reduce eddy current loss, and enhance long-term performance
Grain Orientation	Grain-oriented (along rolling direction)	Ensures maximum magnetic performance along the rolling direction for transformer cores
Marking & Packing	Heat number, coil ID, magnetic grade labels, seaworthy packing	Each coil labeled with standard, grade, size, batch number; packed for safe export and long-distance shipping

Application

Power Transformers: Ideal for distribution and power transformer cores; features extremely low core loss and high magnetic induction in the rolling direction and very high permeability, enabling high efficiency.

Energy Efficient Industrial Transformer: Medium to large industrial transformers with low energy loss and excellent magnetics.

Reactors and Chokes: Well suited for laminated cores under continuous operation in inductors and reactors where magnetic stability and low iron loss are required.

Renewable Energy Transformers: Cores for wind turbines, solar inverters and other renewable energy applications that enable stable operation and are energy-saving.

Electrical Distribution Equipment: Switchgear, voltage regulators and industrial control transformers are all positively influenced by their high stacking coefficient and excellent magnetic stability.

Power Transformers

Energy-Efficient Industrial Transformer

Reactors and Chokes

Renewable Energy Transformers

Electrical Distribution Equipment

Why Choose Royal Steel Group

1.Consistent and Dependable Supply of ASTM A726 Silicon Steel

2.Excellent Magnetic Performance

3.Broad Range of Specifications and Customizable Processing

4.Strict Quality Control with Complete Traceability

5.Proven Experience in Export and International Logistics

6.Technical Support Tailored to Your Applications

Packaging & Shipping

Packaging

Maintenance-Free Protection: A thick layer of high intensity plastic film covers each coil, which can prevent the coil from getting wet, rusting and being damaged on the surface in transportation.

Safe for Seaworthy Packing for Export: We can pack the coils in wooden or steel pallets for container load.

Identification & Traceability: Each coil is marked with grade, thickness, width, batch/heat no and any customer specific project code.

Customized Packaging: We can also customize the packaging as per the transportation distance, climate condition or other special requirements from customers.

Shipping & Logistics

Transport Adapted: For the size of your order, select from FCL (Full Container Load), LCL (Less than Container Load) or by truck.

Reliable Delivery: Royal Steel Group is able to maintain its customers’ schedules without interruption, not delay them, by partnering with experienced shippers.

Broad Experience: We have made a very good job in shipping to North America, Latin America, South East Asia, Europe and etc.

Customized Documentation: We are able to issue full export documentation including MTC (EN 10204 3.1), packing list, invoice and certificates.