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.
1070 O-grade aluminum strip is widely used in the manufacturing of transformer windings due to its high purity, excellent conductivity, appropriate thickness range, and good thermal stability. Its outstanding performance not only improves the operational efficiency and service life of transformers but also effectively reduces manufacturing costs.
The electrical conductivity of 1070 aluminum strip exceeds 62.7% IACS, and its thickness typically ranges from 0.1 mm to 3.5 mm. This range meets the design requirements of different transformer windings, providing flexible options.
1070 aluminum strip is supplied in the O (annealed) temper and is commonly used for transformer windings. These aluminum strips are mainly used in dry-type transformers, oil-immersed transformers, and reactor windings.
Why Choose 1070 O for Transformer Aluminum Strip?
- 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.
- 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.
- 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 Transformer 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. |
| Edge Quality | Slit or round edges with minimal burrs (thin strips ≤ 0.03 mm) to prevent damage to the insulation layer during winding. |
| Thermal Conductivity | High heat dissipation performance to minimize temperature rise during operation. |
| Applications | Transformer winding |
| Packaging | Wooden Pallet/Wooden Case |
1070 Transformer Winding Aluminium Strip Features
- Electrical Conductivity: 1070 O aluminum strip offers high electrical conductivity, typically exceeding 62.7% IACS.
- Thermal Performance: 1070 aluminum strip has good thermal conductivity, helping to effectively dissipate heat, minimize temperature rise during operation, and extend transformer service life.
- Formability and Weldability: The annealed 1070 aluminum strip has excellent formability and weldability, making it easy to process and manufacture transformer windings.
- Corrosion Resistance: 1070 aluminum has outstanding corrosion resistance, contributing to the durability and reliability of transformer components.
Advantages of 1070 O Aluminium Strips for Transformer Windings
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.
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.
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.
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.
Easy to Process and Weld
The aluminum foil strips are easy to process and weld, simplifying the production process and increasing production efficiency.
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.
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 |
Advantages of 1070 Transformers Winding Aluminium Strip Over Copper
| Advantage Category | Description |
| Cost Efficiency | 1070 Transformers Winding Aluminium Strip has significant advantages in cost control. Compared to copper, the raw material cost of aluminum is typically 30% to 50% lower, making it an economical choice for transformer winding materials. Although aluminum’s conductivity is slightly lower than copper, by increasing the conductor cross-sectional area by about 66%, 1070 aluminum strip can achieve comparable electrical performance to copper windings. Considering both material costs and electrical performance, 1070 aluminum strip effectively reduces manufacturing costs while maintaining overall efficiency, especially suitable for mass production and standardized power transformers. |
| Weight Reduction | 1070 Transformers Winding Aluminium Strip has a much lower density (only 2.7 g/cm³) compared to copper (8.96 g/cm³), significantly reducing the weight for the same volume. This lightweight feature makes the entire transformer structure more compact, helps reduce transportation costs and installation complexity, and is especially suitable for overhead or space-constrained applications. Additionally, weight reduction helps lower the load on the foundation structure, enhancing overall system stability and safety. |
| Corrosion Resistance | 1070 Transformers Winding Aluminium Strip has excellent corrosion resistance due to the rapid formation of a dense aluminum oxide protective film on its surface in natural environments. This natural oxide layer has good stability, effectively blocking air, moisture, and chemical substances from corroding the material. In contrast, copper is more prone to oxidation in humid or polluted environments, forming green rust that affects conductivity. Therefore, 1070 aluminum strip is particularly suitable for humid, coastal, or highly polluted industrial environments, helping to improve the long-term operational reliability and service life of transformers. |
| Ease of Processing | 1070 Transformers Winding Aluminium Strip offers excellent ductility and plasticity, making it easier to stamp, cut, bend, and weld during transformer manufacturing. Especially in complex winding designs, aluminum strip better adapts to precise structural layouts, ensuring tight and orderly windings. Additionally, 1070 aluminum’s weldability surpasses that of most copper materials, facilitating automated production and efficient assembly, improving production efficiency and reducing manufacturing difficulty. These processing advantages make it an ideal choice for modern high-performance power equipment. |
1070 O aluminum strip is a cost-effective, high-performance solution for modern transformer windings. Its excellent electrical efficiency, thermal management, and mechanical flexibility make it an ideal choice for applications ranging from small distribution transformers to large industrial equipment.
Incorporating 1070 O aluminum strip in transformer design can improve performance, reliability, and reduce manufacturing costs.
Applications of 1070 Aluminum Strip in Transformer
- Dry-Type Transformers: 1070 aluminum strips are suitable for winding in dry-type transformers, offering good heat dissipation and stable electrical performance.
- Oil-Immersed Transformers: In oil-immersed transformers, 1070 aluminum strips effectively conduct current and maintain stable temperatures.
- 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.