1070 O-grade aluminum strip has an aluminum content of over 99.7%, making it a high-purity aluminum strip. This purity ensures excellent electrical conductivity for transformer aluminum strips.
Due to its high purity, excellent electrical conductivity, moderate thickness range, and good thermal stability, 1070 O-grade aluminum strip is widely used in the manufacture of transformer windings. Its superior performance not only enhances the operational efficiency and lifespan of transformers but also effectively reduces manufacturing costs.
The electrical conductivity of 1070 aluminum strip exceeds 62.7% IACS, with thicknesses typically ranging from 0.1mm to 3.5mm. This range accommodates the design requirements of different transformer windings, providing flexible options.
Why Choose 1070 O for Transformer Aluminum Strip?
- 1. 1070 O aluminum strip is annealed to achieve the O (soft) temper. This temper ensures the strip's flexibility and good processing performance, making it easy to wind into transformer windings.
- 2. 1070 O aluminum strip has excellent heat dissipation properties and does not significantly increase coil temperature during long-term operation. This helps to extend the service life of transformer coils and reduces the risk of overheating.
- 3. Using 1070 O aluminum strip can reduce the batch manufacturing cost of transformers by approximately 15%. This is due to its excellent electrical conductivity and processing performance, which improve production efficiency and reduce material waste.
1070 O Transformers Winding Aluminium Strips Specifications
| Product Name | 1070 O Transformers Winding Aluminium Strips |
| Al Grades | 1070 |
| Temper | O |
| Thickness | 0.1mm-3.5mm |
| Width | 10mm-1600mm |
| Edge | Slit/Round |
| Quantity Tolerance | ±10% |
| Paper Core Internal Diameter | Ø 150mm, Ø300mm, Ø400mm, Ø500mm paper core, special internal diameter core and without paper core on special request |
| Surface Treatment | The strip has a smooth surface, free from scratches and impurities |
| Electrical Conductivity | Transformer windings made of 1070 O in annealed condition is guar-anteed to be better than 62.7 % ACS. |
| Applications | Transformer winding |
| Packaging | Wooden Pallet/Wooden Case |
Advantages of 1070 O Aluminium Strips for Transformer Windings
1. Excellent Electrical Conductivity
1070 O aluminum foil strips have high electrical conductivity and low resistivity, effectively reducing energy loss during power transmission and improving transmission efficiency.
2. Good Thermal Conductivity
1070 aluminum foil strips have good thermal conductivity, effectively dissipating heat, reducing faults caused by overheating, and enhancing the operational stability and lifespan of transformers.
3. Smooth Surface with No Burrs or Scratches
The surface of 1070 O aluminum foil strips is very smooth, avoiding burrs or scratches. This significantly reduces the possibility of short circuits between windings, improving the reliability and safety of the windings.
4. Excellent Ductility and Formability
After annealing, 1070 O aluminum foil strips exhibit good ductility and elongation (≥20%), making them easy to process and bend. This effectively reduces stress caused by deformation and prevents cracking or breaking of coils during bending and installation.
5. Easy to Process and Weld
The aluminum foil strips are easy to process and weld, simplifying the production process and increasing production efficiency.
6. Excellent Corrosion Resistance
1070 O aluminum foil strips have outstanding corrosion resistance, allowing them to work stably in harsh environments for extended periods, thereby extending the lifespan of transformers.
7. Moderate Strength
Although 1070 O aluminum foil strips have lower strength, this characteristic makes them more flexible and easier to handle, making them suitable for transformer windings that require bending and forming.
1070 O Transformers Winding Aluminium Strips Chemical Composition
| Element | Si | Fe | Cu | Mg | Mn | Ti | Zn | Al |
| Standard Value | 0.20 | 0.25 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | Min. 99.70 |
Mechanical Properties of Transformers Winding Aluminium Strip 1070
| Ultimate Strength (≥ MPa) | Elongation (≥ %) | Resistivity 20°C | Density 20°C |
| 65-100 | 20 | ≤0.02825Ωmm2/m | 2.703kg/dm3 |
| Yield (≥ MPa) | Tensile strength | Edge | A(Min) |
| 15 | 60-90N/mm2 | Round | 99.70% |
Thickness tolerance of 1070 aluminum foil 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 1070 aluminum foil 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 |
Applications of 1070 Aluminum Strips in Transformers
- 1. Dry-Type Transformers: 1070 aluminum strips are suitable for winding in dry-type transformers, offering good heat dissipation and stable electrical performance.
- 2. Oil-Immersed Transformers: In oil-immersed transformers, 1070 aluminum strips effectively conduct current and maintain stable temperatures.
- 3. Reactor Windings: 1070 aluminum strips are used in various reactor windings, providing stable electrical performance and durability.
Haomei Other Alloy Transformer Aluminium Strips
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1050 Transformer Aluminium Strips
1050 aluminum strip has a conductivity better than 60% IACS. It is widely used in transformer windings. Its main applications include windings of dry and oil-immersed transformers.
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1060 Transformer Aluminium Strips
Annealed or O-state 1060 aluminum strip has higher flexibility and ductility, and its conductivity is better than 61.5% IACS.
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1350 Transformer Aluminium Strips
1350 aluminum foil strip has a conductivity better than 62% IACS. It is widely used in transformer windings, especially oil-immersed and dry transformers. Its high conductivity ensures the high efficiency and stability of the transformer.