1070 Aluminum Alloy Strip
What is 1070 aluminum alloy strip for transformer
1070 transformer aluminum strip is made of high-purity industrial-grade aluminum, with an aluminum content of no less than 99.7%. Its core characteristics are high electrical conductivity (≥62.7% IACS) and low resistivity, while also possessing excellent thermal conductivity, corrosion resistance, and ductility.
It is widely used in the high and low voltage windings of dry-type and oil-immersed transformers, and is also suitable for special transformers such as rectifier transformers, reactors, photovoltaic inverter transformers, and charging pile transformers. It is compatible with various transformer insulation systems to meet the power transmission and heat dissipation requirements of different scenarios.
Chemical composition of alloy 1070
Al | Si | Fe | Cu | Mn | Mg | Zn | Ti | V | Other(each) | Other(total) |
≥99.7% | ≤0.20% | ≤0.25% | ≤0.04% | ≤0.03% | ≤0.03% | ≤0.04% | ≤0.03% | ≤0.05% | ≤0.03% | ≤0.03% |
Specification of 1070 aluminum strip
Alloy | 1070 |
Electricity conductivity | ≥62.7% IACS |
Thickness | 0.2-3 mm, with tolerance of ±0.03-±0.08 |
Width | 100-1000 mm, with tolerance of ±0.5-±1.0 |
Coil ID | 300 mm~510 mm |
CIL OD | 1000 mm |
Surface quality | Mill finish or according to customer specifications. |
1070 aluminum strip properties
Conductivity: ≥62.7% IACS (at 20℃)
Resistivity: ≤2.826×10⁻⁸ Ω·m (at 20℃)
Heat dissipation: Thermal conductivity approximately 230 W/(m·K) (at 20℃)
Tensile strength (at 20℃): ≥75 MPa
Elongation (at 20℃): ≥30%
Yield strength (at 20℃): ≥30 MPa
Density: Approximately 2.70 g/cm³ (at 20℃)
1050 VS 1060 VS 1070: which is the best and which is to choose
1050, 1060, and 1070 aluminum strips all belong to the industrial pure aluminum series. The core differences lie in aluminum purity, conductivity, and mechanical strength, which ultimately affect transformer efficiency, service life, and procurement budget. There is no need to pursue the "highest specifications"; precise matching is the optimal choice.
Alloy | Aluminum Purity (Minimum) | Electrical Conductivity (%IACS) | Core Mechanical Properties | Relative Cost | Core Positioning |
1050 | 99.5% | Approx. 60.0% (≥59%) | Highest tensile strength (75-120MPa), good high-temperature stability, low thermal shrinkage, and strong corrosion resistance. | Lowest | Economical and practical, balancing strength and cost, suitable for applications with low efficiency requirements. |
1060 | 99.6% | Approx. 61.5% (60%-61.5%) | Balanced performance, balancing conductivity, strength, and processability (e.g., bending, winding); short-term withstand capability superior to 1070 | Moderately low | Optimal cost-performance ratio, compatible with most conventional transformers, balancing efficiency and cost. |
1070 | 99.7% | Approximately 62.0% (61.5%-62.7%) | Optimal electrical conductivity, good flexibility (no edge cracking after O-state annealing), but slightly lower tensile strength | Highest | High-efficiency and energy-saving type, suitable for high-end applications with extremely high requirements for loss and efficiency. |
Packing &Delivery
The core packaging principles for 1070 transformer aluminum strip exports are: anti-oxidation, anti-deformation, and compliant customs clearance.
Inner layer: Aluminum strip is wrapped in plastic film/VCI film, and equipped with desiccant (vacuum packaging possible);
Outer layer: Covered with fiberboard/cardboard, fumigated wooden pallets/crates reinforced with steel straps;
Labeling: Marked with grade, specifications, and other information, and marked with pesticide residue control labels, complying with export regulations;
Compatibility: Can be adjusted according to the export region and container size.
Original source: https://www.alcustrip.com/product/1070-aluminum-alloy-strip.html
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