English
Views: 0 Author: Site Editor Publish Time: 2026-04-20 Origin: Site
Aluminum coil is one of the most commonly used materials in electrical engineering, mainly used to separate conductors and provide insulation. Aluminum coil for transformer windings is a soft metal film with excellent plasticity, uniform thickness and smooth surface. It features outstanding performance including moisture-proof, waterproof, oil-resistant, salt-corrosion resistant, acid and alkali resistant, as well as chemical resistance. The surface is clean, smooth and free of spots or cracks.
Transformer aluminum coil can be customized in various widths and thicknesses as per customer requirements. It is available in different grades, specifications and tempers based on applications.
Grades: 1050, 1060, 1070, 1350
Temper: O temper (soft state; numbers can be added to indicate hardness and annealing level)
Thickness: 0.2–3.0mm (defined as transformer aluminum coil)
Transformer aluminum coil helps dry-type transformers achieve compact size, light weight, excellent insulation, flame retardancy, pollution-free operation, low partial discharge, moisture resistance, stable and reliable performance, low noise and low maintenance costs. It is widely used in high-rise buildings, underground facilities, commercial centers, residential areas, hotels, coastal humid areas and more.
1. The Sizes and specifications of transformer aluminum coils we can provide:
Item | Details |
Product Name | Aluminum Coil for Transformer Windings |
Alloy Grades | 1050, 1060, 1070, 1350 |
Temper | O |
Thickness | 0.2mm – 3.0mm |
Width | 10mm – 1600mm |
Edge | Burr-free |
Quantity Tolerance | ±10% |
Core Inner Diameter | Ø150mm, Ø300mm, Ø400mm, Ø500mm; special inner diameters & coreless available |
Surface Treatment | Smooth surface, free of scratches and impurities |
Conductivity | - 1050 O temper: ≥60% IACS - 1060 O temper: ≥61.2% IACS - 1070 O temper: ≥62.7% IACS - 1350 O temper: ≥62% IACS |
Application | Transformers |
Packing | Wooden pallet / wooden case |
Payment Terms | 30% TT deposit, 70% balance before shipment; 100% LC at sight |
Delivery Time | 7–10 working days |
MOQ | 5 Tons |
Port of Shipment | Shanghai / Qingdao |
2. Key Features of aluminum coils for transformers：
a）High Electrical Conductivity
Conductivity of 60% IACS or above ensures efficient power transmission, ideal for electrical and energy applications.
b）High Aluminum Purity
Aluminum purity over 99.50% guarantees superior conductivity and performance for critical industrial use.
c）Excellent Mechanical Properties
Tensile strength: 60–95MPa, elongation ≥25%, ensuring stability and reliability in operation.
d) Wide applications:
Designed for various industries requiring high-conductivity materials, such as transformer aluminum busbars, new energy conductive connectors and other high-conductivity aluminum products.
3.Aluminum Coil 1050 / 1060 / 1070 / 1350 Chemical Composition & Typical Physical & Mechanical Properties
(Standard: GB/T 3190, ASTM B209 / AA; For transformer winding aluminum coil in O temper)
a) Chemical Composition (wt%)
Alloy grade | Al≥ | Si≤ | Fe≤ | Cu≤ | Mn≤ | Mg≤ | Zn≤ | Ti≤ | Single Impurity≤ | Total Impurities |
1050 | 99.50 | 0.25 | 0.40 | 0.05 | 0.05 | 0.05 | 0.05 | 0.03 | 0.03 | 0.50 |
1060 | 99.60 | 0.25 | 0.35 | 0.05 | 0.03 | 0.03 | 0.05 | 0.03 | 0.03 | 0.40 |
1070 | 99.70 | 0.20 | 0.25 | 0.04 | 0.03 | 0.03 | 0.04 | 0.03 | 0.03 | 0.30 |
1350 | 99.50 | 0.10 | 0.40 | 0.05 | 0.01 | 0.01 | 0.05 | 0.03 | 0.03 | 0.50 |
b) Electrical & Mechanical Properties (O Temper)
Alloy grade | Electrical Conductivity (IACS) | Resistivity (20℃) | Tensile Strength (MPa) | Elongation ≥ | Typical Application |
1050 | ≥60.0% | ≤2.87×10⁻⁸ Ω·m | 60–95 | 25% | General purpose, cost-effective |
1060 | ≥61.2% | ≤2.82×10⁻⁸ Ω·m | 60–95 | 25% | Higher purity, better conductivity |
1070 | ≥62.7% | ≤2.75×10⁻⁸ Ω·m | 60–95 | 25% | Ultra‑high purity, low loss transformers |
1350 | ≥62.0% | ≤2.78×10⁻⁸ Ω·m | 60–95 | 25% | Electrical grade, stable co |
What Are the Advantages of Transformer Aluminum Coil?
The advantages of using 1050/1060/1070/1350 aluminum coil for transformer windings are as follows, which make it the preferred choice for electrical equipment:
a. Excellent processability: Our transformer aluminum coil can be processed into various cross-sectional shapes according to customer requirements, adapting to different transformer winding designs.
b. High surface quality: Ensures uniform magnetic field distribution when the transformer is working.
c. Good electrical and thermal conductivity: Transformer aluminum coil has excellent electrical and thermal conductivity, helping transformers work stably and efficiently under standard conditions, reducing energy loss.
d. Superior magnetic properties: Guarantees stable operation of transformers under various conditions.
e. High tensile strength and elongation: Widely used in transformers.
How to Choose Transformer Aluminum Coil?
There are many suppliers and manufacturers of transformer winding aluminum coils, but not all can produce high-quality 1050/1060/1070/1350 aluminum coils. Some use cheap raw materials, which will affect the performance of transformers and is not a good choice for users.
Here is a quick guide to choosing a high-quality supplier:
First, ask the manufacturer if they can conduct their own inspections before delivery. Most large factories have professional testing teams to strictly inspect all goods before shipment.
Second, confirm if they use 100% pure raw materials. Some suppliers use recycled or mixed raw materials, which may cause problems during use.
Third, it is recommended to place a small trial order first to test the product quality and service, ensuring the quality risk is controllable before mass production.
What Hardness Is Transformer Aluminum Coil?
After professional annealing, the typical Brinell Hardness (HB) of our transformer aluminum coil (1050/1060/1070/1350) is about 25–35, showing extremely soft texture, which is suitable for transformer winding processing.
What Are the Packaging Standards for Transformer Aluminum Coil?
Our transformer aluminum foil (1050/1060/1070/1350) is mainly packaged in wooden pallets and wooden cases. Each roll of aluminum coil should have the same length, and the packaging label should contain clear and complete product information for easy identification.
Non-solid wood multi-layer wooden pallets: Standard export packaging, fumigation-free.
Multi-layer wooden case packaging: Fumigation-free, avoids potential damage during transportation, but is more expensive than pallet packaging.
What Are the Quality Requirements for Transformer Aluminum Coil?
Our transformer winding aluminum foil (1050/1060/1070/1350) is made of high-quality aluminum, featuring high conductivity (≥60% IACS), soft texture, smooth surface (no burrs, no waves). The thickness can be controlled at 0.2mm or less, and the alloy composition and temper can be adjusted according to customer requirements. Thickness tolerance: ±0.007mm; width tolerance: ±1mm; diagonal difference ≤1mm, meeting strict quality standards for transformer applications.
What Are the Production Processes of Transformer Aluminum Coil?
Raw materials (high-purity electrolytic aluminum) are heated in a furnace to remove impurities, ensuring the quality of transformer aluminum coil.
Ingots are cut into thick plates.
Thick plates are put into a cold rolling mill for rough rolling.
Put into a hot rolling mill for precision processing.
Annealing by heating and maintaining at a certain temperature.
External cutting with a shearing machine.
Packaging and transportation.
What Is the HS Code for Transformer Aluminum Coil?
To find the detailed HS code for transformer winding aluminum foil, you need to confirm the specifications and applications of the strip foil. The HS code for our 1050/1060/1070/1350 transformer winding aluminum foil is: 76061199.00, which is applicable to most export scenarios.
Why Choose Green House Supply the Transformer Aluminum Coil?
Green House Aluminum provides high-quality 1050, 1060, 1070, 1350 transformer aluminum coils, which meet strict international quality standards and are made of high-purity aluminum (impurities ≤0.05%) to ensure reliable and efficient performance for transformer windings.
Excellent Conductivity: Our 1050/1060/1070/1350 aluminum coils have a conductivity of 60% IACS or above, ensuring excellent performance in energy transmission and electrical applications.
High-Purity Materials: Made of high-quality electrolytic aluminum stock solution, with impurities reduced to below 0.05% through our special factory processes.
Custom Solutions: We provide customized solutions to meet your exact requirements.
Sustainability & Efficiency: Our products help industries improve energy efficiency and meet the growing demand for environmentally friendly materials.
