Aluminum Strip Foil for Transformer Windings
High-purity grades 1050, 1060, 1070 & 1350 with >60% IACS conductivity. Burr-free edges, O temper, custom sizes available.
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What is Aluminum Foil for Transformer Windings?
Aluminum transformer strip and foil is a thin, flat aluminum product specifically designed for manufacturing transformer windings, especially for dry-type transformers.
Processed from high-purity aluminum (grades 1050, 1060, 1070, and 1350) in O temper (soft temper) to ensure excellent processability.
High Conductivity
>60% IACS
Burr-Free Edges
Safe handling
Why 70% of Manufacturers Choose Aluminum
Key advantages of aluminum strip and foil over copper for transformer windings
Superior Cost-Effectiveness
Aluminum costs 30%-50% less than copper with comparable performance for transformer applications.
Excellent Conductivity
Pure aluminum (1060) reaches 61% IACS electrical conductivity, ideal for efficient power transmission.
Lightweight Design
Density 2.7 g/cm³ (only 1/3 of copper) reduces transformer weight by 25%-30%.
Corrosion Resistance
Forms a dense Al₂O₃ oxide film that resists moisture, dust, and industrial pollutants.
Outstanding Processability
O temper allows easy bending, stamping, and winding without cracking or deformation.
Product Specifications
Alloy Grades
1050 / 1060 / 1070 / 1350
Temper
O (Soft)
Thickness
0.1 - 3.5 mm
Width
10 - 1600 mm
Key Parameters
Precision Manufacturing
Every coil meets strict dimensional and electrical standards for transformer applications.
Thickness Tolerance
| Thickness (mm) | Tolerance |
|---|---|
| 0.08 - 0.20 | ±8% of nominal |
| >0.20 - 0.40 | ±0.02mm |
| >0.40 - 0.80 | ±0.03mm |
| >0.80 - 1.10 | ±0.04mm |
| >1.10 - 1.40 | ±0.05mm |
| >1.40 - 2.00 | ±0.06mm |
| >2.00 - 2.50 | ±0.07mm |
| >2.50 - 3.00 | ±0.08mm |
Lateral Curvature Tolerance
| Width (mm) | Over 2000mm | Over 1000mm |
|---|---|---|
| 15 - 100 | 6mm | 1.5mm |
| 100 - 300 | 4mm | 1.5mm |
| 300 - 600 | 3mm | 0.7mm |
| 600 - 1540 | 2mm | 0.5mm |
Width Tolerance (Simplified)
Width tolerance varies from +0.3mm (for narrow strips ≤100mm) to +2.5mm (for wide strips >1250mm), depending on both thickness and width. Contact us for specific tolerance requirements.
Edge Treatment Options
Worthwill supports multiple edge treatments. The radius of rounded edges can be customized, and all edges are smooth and burr-free.
Rounded Edges
Full radius for maximum safety
90° Square Edges
Sharp right-angle corners
Straight + Radius
Rounded corners on straight sides
Straight + Chamfer
45° chamfered corners
Popular Aluminum Strip and Foil for Transformer Windings
1050 Aluminum Strip and Foil
Aluminum:≥99.5%
Conductivity:≥60% IACS
Tensile:70-95 MPa
1060 Aluminum Strip and Foil
Aluminum:≥99.6%
Conductivity:≥61.5% IACS
Tensile:75-100 MPa
1070 Aluminum Strip and Foil
Aluminum:≥99.7%
Conductivity:≥62.7% IACS
Tensile:70-90 MPa
1350 Aluminum Strip and Foil
Aluminum:≥99.5%
Conductivity:≥62% IACS
Tensile:75-95 MPa
Chemical Composition (max %)
1050
Al ≥99.5%
Si ≤0.25, Fe ≤0.40
1060
Al ≥99.6%
Si ≤0.25, Fe ≤0.35
1070
Al ≥99.7%
Si ≤0.20, Fe ≤0.25
1350
Al ≥99.5%
Si ≤0.10, Fe ≤0.40
Key Physical Properties (O Temper)
| Property | 1050 | 1060 | 1070 | 1350 |
|---|---|---|---|---|
| Conductivity (IACS) | ≥60% | ≥61% | ≥62% | ≥61% |
| Tensile (MPa) | 70-95 | 75-100 | 70-90 | 75-95 |
| Elongation | 20-28% | 22-29% | 25-30% | 22-28% |
| Hardness (HB) | 15-18 | 16-19 | 15-18 | 16-18 |
Source: makeitfrom.com
Where Are Aluminum Transformer Strips Used?
Our aluminum strips and foils are widely used in various transformer types and electrical applications across the power industry.
Dry-Type Transformers
Primary application for low and high voltage windings in commercial and industrial buildings.
Distribution Transformers
Step-down transformers for residential and commercial power distribution networks.
Reactor & Inductor Coils
Used in power factor correction equipment and harmonic filtering systems.
Solar Inverter Transformers
Lightweight aluminum windings for renewable energy applications.
Professional Manufacturer You Can Trust
Good Formability
Uniform thickness for easy winding
Burr-Free Edges
Safe handling guaranteed
Excellent Conductivity
>60% IACS verified
Clean Surface
Smooth, uniform, oil-free
Competitive Price
Direct factory pricing
Free Samples
Test before you order
Material Certificate Included
Chemical composition • Conductivity test • Mechanical properties • Hardness measurement
Professional Packaging
Foam film + Plastic wrap + Wooden pallets
Frequently Asked Questions
Common questions about aluminum strip for transformer windings
Ready to Get Started?
Contact us for pricing, specifications, or to request free samples of our aluminum transformer strips.
HS Code: 76069100.00 | Samples available for testing
