Wholesale ASTM A876 23G048 27G051 30G058 Cold-rolled Grain-Oriented Electrical Steel (GOES) Coil Manufacturer and Supplier

ASTM A876 23G048 27G051 30G058 Cold-rolled Grain-Oriented Electrical Steel (GOES) Coil

Short Description:

Cold-rolled grain-oriented (CRGO) silicon-iron alloy (≈3.2% Si) conforming to ASTM A876 ASTM International. Grades 23G048 (0.23mm), 27G051 (0.27mm), 30G058 (0.30mm) feature low core loss and high permeability in the rolling direction ASTM International. Ideal for power/distribution transformer cores operating at 50/60 Hz with moderate-to-high magnetic flux densities ASTM International.

Standard: ASTM A876 23G048 27G051 30G058

Type: Cold Rolled Grain-Oriented Electrical Silicon (GOES)

Thickness: 0.23mm (0.009 in), 0.27mm (0.011 in), 0.30mm (0.012 in)

Width: 800–1250mm (Slitting Service Available)

Application: Transformer Core, Motor, Generator

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Product Detail

Product Tags

General Information

Item	Description
Product Name	ASTM A876 Silicon Steel Coil
Steel Type	Grain-Oriented Electrical Steel (GOES)
Manufacturing Process	Cold-Rolled, Fully Annealed
Standard	ASTM A876
Application Frequency	50 / 60 Hz
Typical Applications	Transformer Cores, Motors, Generators, Inductors

Chemical Composition (Typical)

Element	Typical Composition (%)	Notes
Carbon (C)	≤ 0.005	Ensures low core loss and minimizes eddy currents
Silicon (Si)	2.8 – 3.5	Improves magnetic permeability and reduces core loss
Manganese (Mn)	≤ 0.30	Enhances steel strength and ductility
Phosphorus (P)	≤ 0.03	Controls brittleness, improves magnetic properties
Sulfur (S)	≤ 0.03	Reduces impurities, prevents processing defects
Aluminum (Al)	0.03 – 0.10	Deoxidizes steel and ensures uniformity
Iron (Fe)	Balance (~95–97%)	Main base element

Physical & Magnetic Properties

Category	Property	Typical / Specified Value	Notes
Steel Type	Chemical Composition	~3.0–3.2 % Si, low C	Designed for low core loss and high magnetic permeability
Physical Dimensions	Thickness	0.18–0.35 mm (customizable)	Commonly used for transformer core laminations
	Width	Customizable	Slit to customer specifications
	Density	~7,650 kg/m³	Typical for 3 % silicon steel
	Lamination Factor / Stacking Factor	≥0.96	Indicates compactness of stacked laminations
	Surface Coating	C‑5 or similar insulating coating	Reduces interlaminar eddy current losses
Magnetic Properties	Core Loss (P)	0.8–1.2 W/kg (50 Hz, 1.7 T)	Tested per ASTM A343; varies by grade
	Magnetic Induction (B8 / J800)	≥1.80–1.88 T	Higher-induction grades can achieve higher values
	Relative Permeability (μᵣ)	1,000–1,800+	High along rolling direction; higher for Hi‑B grades
	Magnetic Aging / Stability	Within standard limits	Ensures long-term stable performance
Mechanical Properties	Ductility / Workability	Meets standard requirements	Suitable for punching, bending, and stacking
Mechanical Properties	Test Standards	ASTM A343 / ASTM A804, etc.	Core properties tested per standard methods

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Industry Procurement Recommendations

Industry	Procurement & Material Recommendation	Key Selection Points
Home Appliance	Prioritize 0.5mm non-oriented electrical steel (e.g. 50W600) with stable supply and good workability.	Stable supply & excellent processing performance
New Energy Vehicle	Adopt 0.2mm–0.35mm high-grade non-oriented silicon steel to reduce energy loss at high speed.	Low energy loss & high-speed adaptability
Distribution Transformer	Hot-selling 0.23mm / 0.27mm grain-oriented steel with outstanding low core loss performance.	Low core loss & superior magnetic property
Project Bidding & Trade Inquiry	Verify Core Loss and Magnetic Induction to confirm material grade.	Check core loss & magnetic induction parameters

Royal Steel Group Advantage（Why Royal Group Stands Out for Americas Clients?）

1) Branch Office - Spanish-speaking support, customs clearance assistance, etc.

2) Over 5,000 tons of stock in stock, with a wide variety of sizes

3) Inspected by authoritative organizations such as CCIC, SGS, BV, and TUV, with standard seaworthy packaging

Packing And Delivery

Packaging Features

Coil Protection: The inner core utilizes a steel or paper tube; edges are fitted with corner guards or angle iron; the surface is covered with moisture-proof paper or PE film, and anti-rust oil may be applied as required.

Securing Method: Secured using high-strength steel strapping; wooden pallets are available as an option.

Group Bundling (Optional): Thin coils may be bundled in groups; individual coils within the group are separated by paper to prevent scratching, and the entire assembly is wrapped in plastic film.

Transportation Methods

Sea Freight: Transported in 20-foot or 40-foot containers, securely anchored using wooden wedges.

Rail Transport: Transported on flatcars or rail freight wagons, secured using chains or support brackets.

Handling and Storage

Handling: Please use coil hooks, lifting equipment, or C-hooks for handling; dragging of coils is strictly prohibited.

Storage: Store in an upright position to prevent deformation and rusting; store in a dry, well-ventilated environment, and avoid stacking to excessive heights.

Stable cooperation with shipping companies such as MSK, MSC, COSCO efficiently logistics service chain, logistics service chain are we to your satisfaction.

We follow the standards of quality management system ISO9001 in all procedure, and have strict control from packaging material purchase to transport vehicle scheduling.

FAQ

1. What is it and why use it?
Grain-oriented silicon steel is a low-carbon, high-silicon electrical steel with grains aligned along the rolling direction. This ensures high magnetic permeability and low core loss, making it ideal for transformers and energy-efficient electrical devices.

2. Typical applications:
Used in power and instrument transformers, large motors, generators, reactors, and renewable energy equipment where high magnetic efficiency is required.

3. Key properties:
Thickness: 0.18–0.35 mm (customizable)
Core loss: ~0.8–1.2 W/kg @ 50 Hz, 1.7 T
Magnetic induction (B8): ≥1.80–1.88 T
Relative permeability: 1,000–1,800+
Lamination factor: ≥0.96

4. Differences from non-oriented silicon steel:
Grain-oriented steel is directional, optimized for the rolling direction (best for transformer cores), while non-oriented steel is isotropic, suitable for rotating machines like motors.

5. Handling and storage tips:
Avoid bending or stacking that damages grain orientation.
Store in dry, non-corrosive environments.
Insulating coatings (e.g., C-5) reduce eddy current loss and protect laminations.