ASTM Standard A677 Cold Rolled Grain-Oriented Electrical Silicon Steel(GOES) Coil
Product Detail
General Information
| Item | Description |
|---|---|
| Product Name | ASTM A677 Silicon Steel Coil |
| Steel Type | Grain-Oriented Electrical Steel (GOES) |
| Manufacturing Process | Cold-Rolled (CRGO) |
| Standard | ASTM A677 / A677M |
| Application Frequency | 50 / 60 Hz |
Chemical Composition (Typical)
| Element | Content |
|---|---|
| Silicon (Si) | 3.0 – 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 |
| Core Loss | Ultra-low |
| Magnetic Permeability | High |
| Magnetic Induction | High (B8 / B10) |
| Performance Stability | Excellent under continuous load |
Available Thickness
| Thickness (mm) | Typical Application |
|---|---|
| 0.23 | Ultra-high efficiency transformers |
| 0.27 | Power & distribution transformers |
| 0.30 | Standard transformer applications |
ASTM A677 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 (%) |
|---|---|---|---|---|---|
| A677-230 | 0.23 | 7.65 | 0.90 | ≥ 1.90 | ≥ 96.0 |
| A677-250 | 0.23 | 7.65 | 0.95 | ≥ 1.90 | ≥ 96.0 |
| A677-270 | 0.27 | 7.65 | 1.05 | ≥ 1.90 | ≥ 96.0 |
| A677-300 | 0.30 | 7.65 | 1.15 | ≥ 1.88 | ≥ 95.5 |
| A677-330 | 0.30 | 7.65 | 1.20 | ≥ 1.88 | ≥ 95.5 |
ASTM A677 Silicon Steel Coil Customized Content
| Customization Category | Available Options | Description / Notes |
|---|---|---|
| Dimensions | Thickness, width, coil weight | Thickness: 0.23 / 0.27 / 0.30 mm; Width: 600–1,200 mm; Coil weight: 3–8 MT or as required |
| Magnetic Grade | Core loss levels (W/kg), permeability classes | Magnetic loss grades customized according to transformer design requirements (e.g. low-loss, high-permeability grades) |
| Processing | Slitting, cut-to-length, edge trimming, stress relief annealing | Coils can be slit into narrow strips or cut into sheets for transformer core manufacturing |
| Surface Insulation | C2, C5, C6 insulation coatings | Insulation coatings improve interlaminar resistance and reduce eddy current losses |
| Grain Orientation | High grain orientation, laser scribed (optional) | Enhanced magnetic domain alignment for improved efficiency and reduced core loss |
| Marking & Packing | Heat number, coil ID, magnetic grade labels, seaworthy packing | Each coil marked with standard, grade, size, and batch number; export packing suitable for long-distance shipment |
Application
1.Power Transformers: ASTM A677 grain-oriented silicon steel sheets are widely used in power transformer cores due to their ultra-low iron losses and high permeability, significantly reducing no-load losses and improving energy efficiency.
2.Distribution Transformers: Suitable for distribution transformers operating under continuous loads, ensuring stable magnetic properties, reducing heat generation, and extending service life.
3.High-Efficiency Transformers for AI Data Centers: Meeting the stringent requirements of hyperscale data centers, low iron losses and high magnetic flux density are crucial for minimizing energy waste and ensuring power stability.
4.Reactors and Inductors: Reactors and inductors used for applications requiring strong directional magnetic properties and stable performance under alternating magnetic fields.
5.Specialty Industrial Transformers: Oil-immersed and dry-type transformers suitable for high reliability requirements in industrial, renewable energy, and infrastructure projects.
Why Choose Royal Steel Group
1. Reliable Supply of ASTM A677 Silicon Steel
2. Excellent Magnetic Performance
3. Wide Specification & Custom Processing
4. Strict Quality Control & Full Traceability
5. Export Experience & Global Logistics Support
6. Application-Oriented Technical Support
Packaging & Shipping
Packaging
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Moisture-Proof Protection: Each coil is wrapped with high-strength plastic film to prevent moisture, rust, and surface damage during transit.
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Seaworthy Export Packaging: Coils are packed on wooden or steel pallets suitable for container shipment.
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Identification & Traceability: Each coil is labeled with grade, thickness, width, batch/heat number, and any customer-specific project code.
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Optional Custom Packaging: Packaging can be adapted for long-distance transport, harsh weather, or specific customer requirements.
Shipping & Logistics
Flexible Transport: Available for FCL (Full Container Load), LCL (Less than Container Load), or truck shipment depending on project size.
Stable Delivery: Royal Steel Group works with experienced shipping partners to ensure timely arrival, minimizing project delays.
Global Export Experience: We ship successfully to North America, Latin America, Southeast Asia, Europe, and other regions.
Custom Documentation: Full export documentation including MTC (EN 10204 3.1), packing list, invoice, and certificates can be provided.
FAQ
Q1: What is it used for?
A1: Power and distribution transformers, AI data center transformers, and electrical cores.
Q2: What thicknesses are available?
A2: 0.23mm, 0.27mm, 0.30mm (custom sizes available).
Q3: Can it be slit or cut-to-length?
A3: Yes, slitting and cut-to-length services are available.
Q:4 What coatings are available?
A4: C2, C5, or C6 insulation coatings.
Q5: How is it packed?
A5: Moisture-proof wrapped, labeled, on wooden or steel pallets for export.
Q6: Do you provide technical support?
A6: Yes, we help select the right grade and thickness for your project.
