Why choose Chalco aluminum foils and strips?
As an aluminum company, we are proud to collaborate with renowned partners such as LEGRAND, ABB, SIEMENS, EATON, and TOSHIBA. The selection of these partners validates our exceptional capabilities in terms of quality, reliability, and innovation.
Our strength lies in delivering high-performance aluminum materials to our partners and continuously driving innovation and advancement in the industry.
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Aluminum foils and strips for transformers specifications
| Alloy grade | Temper | Thickness /mm | Inner diameter /mm | Outer diameter /mm | Width/mm |
| 1050, 1060, 1070, 1350 | O | 0.08-0.20 | 150, 300, 400 | 700-980 | 16.0-1500.0 |
| >0.20-1.50 | 150, 205, 300, 350, 400, 000 | ||||
| >1.50-3.00 | 300, 400, 500, 600 |
Electrical conductivity of aluminum foils and strips for transformers
- 1050 is better than 60% IACS.
- 1060 is be better than 61.5% IACS.
- 1070 is better than 62.7% IACS.
- 1350 is better than 62% IACS.
Thickness tolerance of aluminum foils and strips for transformers
| Thickness | Thickness tolerance |
| 0.08-0.20 | ±8% of nominal thickness |
| >0.20-0.40 | ±0.02 |
| >0.40-0.80 | ±0.03 |
| >0.80-1.10 | ±0.04 |
| >1.10-1.40 | ±0.05 |
| >1.40-2.00 | ±0.06 |
| >2.00-2.50 | ±0.07 |
| >2.50-3.00 | ±0.08 |
Width tolerance of aluminum foils and strips for transformers
| Thickness | Width tolerance (+) | ||||
| ≤100.0 | >100.0-300.0 | >300.0-500.0 | >500.0-1250.0 | >1250.0-1500.0 | |
| >0.08-0.20 | 0.3 | 0.4 | 0.6 | 1.0 | 2.0 |
| >0.20-0.60 | 0.3 | 0.4 | 0.6 | 1.5 | 2.5 |
| >0.60-1.00 | 0.3 | 0.5 | 1.0 | 1.5 | 2.5 |
| >1.00-2.00 | 0.4 | 0.7 | 1.2 | 2.0 | 2.5 |
| >2.00-3.00 | 1.0 | 1.0 | 1.5 | 2.0 | 2.5 |
Edge (Burr, Camber, Layering)
| Thickness | Burr | Camber | Layering |
| ≤0.20 | ≤0.03 | ≤0.5 | ≤4 |
| >0.20 | ≤0.05 | ≤2 | ≤5 |
Mechanical properties of aluminum foils and strips for transformers
| Alloy | Thickness /mm | Temper | Tensile strength MPa | Elongation (%) |
| 1050, 1060, 1070, 1350 | 0.08-0.20 | O | 60-95 | ≥20 |
| >0.20-3.00 | ≥25 |
Aluminum foil for transformer winding chemical composition
1050 O aluminum foil for transformer winding chemical composition
| Element | Composition(%) |
| Al | ≥99.5 |
| Si | 0.0431 |
| Fe | 0.203 |
| Mg | 0.0013 |
| Zn | 0.0093 |
| Mn | 0.0104 |
| Ti | 0.02 |
| Cu | 0.0022 |
| V | 0.0039 |
1060 O aluminum foil for transformer winding chemical composition
| Element | Composition(%) |
| Al | ≥99.6 |
| Si | 0.0431 |
| Fe | 0.203 |
| Mg | 0.0013 |
| Zn | 0.0093 |
| Mn | 0.0104 |
| Ti | 0.02 |
| Cu | 0.0022 |
| V | 0.0039 |
1070 O aluminum foil for transformer winding chemical composition
| Element | Composition(%) |
| Al | ≥99.7 |
| Si | 0.0431 |
| Fe | 0.203 |
| Mg | 0.0013 |
| Zn | 0.0093 |
| Mn | 0.0104 |
| Ti | 0.02 |
| Cu | 0.0022 |
| V | 0.0039 |
1350 O aluminum foil for transformer winding chemical composition
| Element | Composition(%) |
| Al | ≥99.5 |
| Si | 0.0431 |
| Fe | 0.203 |
| Mg | 0.0013 |
| Zn | 0.0093 |
| Mn | 0.0104 |
| Ti | 0.02 |
| Cu | 0.0022 |
| V | 0.0039 |
Transportation and packaging
Standard export wooden pallet or wooden case. Also we can meet special requirements from our customers. Deliver in coil, hard paper core inside, with paper interleaved. Eye to wall and eye to sky are both available.
Application of aluminum foil for transformer winding
- In air-cooled transformers, aluminum windings occupy a significant portion of the transformer's space. Therefore, we use transformer aluminum strips for cost-effective and low-cost production.
- Aluminum windings are used in dry-type or oil-immersed transformers with a rated power of up to 4 MVA.
