Products can be customized
O soft aluminum strip for transformer winding is a kind of annealed aluminum strip specially processed for electrical winding applications. With high conductivity, excellent ductility and precise dimensional tolerance, it is an ideal conductor material for transformer winding production.
This product is commonly manufactured from high-purity aluminum grades such as 1050, 1060, 1070 or 1350, and can be supplied in customized thicknesses and widths according to customer requirements. The strip features smooth surface, clean edge and good coil consistency, which helps improve winding efficiency and product reliability.
Product Name | O Soft Aluminum Strip for Transformer Winding |
Material / Grade | 1050 / 1060 / 1070 / 1350 |
Temper | O / Soft / Annealed |
Thickness | 0.2 mm – 3.0 mm |
Width | 10 mm – 1250 mm |
Edge | Slit edge / Round edge / Deburred edge |
Surface | Smooth, clean, without scratches or oil stain |
Conductivity | According to material grade and customer requirements |
Inner Diameter | Customizable |
Coil Weight | Customizable |
Standard | GB / ASTM / EN or customer requirements |
Application | Transformer winding, dry-type transformer, oil-immersed transformer |
Note: Custom sizes, coil weight and technical requirements are available according to transformer design and winding process requirements.
Thickness and Width Tolerance:
Thickness (mm) | Thickness Tolerance (mm) | Width (mm) | Width Tolerance (mm) |
0.20 – 0.50 | ±0.01 / ±0.02 | ＜100 | ±0.10 |
0.50 – 1.00 | ±0.02 | 100-200 | ±0.15 |
1.00 – 2.00 | ±0.03 | 201-500 | ±0.20 |
2.00 – 3.00 | ±0.04 | 501-1250 | ±1 |
Burr and Edge Collapse Tolerance:
Item | Requirement |
Burr height | ≤ 0.03 mm |
Edge collapse | ≤ 0.05 mm |
Edge condition | Smooth, neat and without obvious deformation |
Surface edge quality | No crack, no heavy burr, no sharp edge |
Note: Edge quality can be controlled according to product thickness, slitting condition and customer winding requirements.
Chemical Composition:
Alloy | Al (%) Min | Si (%) Max | Fe (%) Max | Cu (%) Max | Mn (%) Max | Mg (%) Max | Zn (%) Max | Others Max |
1050 | 99.50 | 0.25 | 0.40 | 0.05 | 0.05 | 0.05 | 0.05 | 0.03 each / 0.10 total |
1060 | 99.60 | 0.25 | 0.35 | 0.05 | 0.03 | 0.03 | 0.05 | 0.03 each / 0.10 total |
1070 | 99.70 | 0.20 | 0.25 | 0.04 | 0.03 | 0.03 | 0.04 | 0.03 each / 0.10 total |
1350 | 99.50 | 0.10 | 0.40 | 0.05 | 0.01 | 0.05 | 0.05 | 0.03 each / 0.10 total |
Note: Chemical composition may vary slightly depending on the production standard, such as GB, ASTM or EN standard.
Typical Mechanical Properties (O Temper):
Alloy | Temper | Tensile Strength (MPa) | Elongation (%) |
1050 | O | 60 – 95 | ≥ 20 |
1060 | O | 60 – 95 | ≥ 20 |
1070 | O | 55 – 90 | ≥ 25 |
1350 | O | 60 – 95 | ≥ 20 |
Note: Mechanical properties are for reference only and may vary with thickness, production process and applicable standards.
Electrical Property:
Alloy | Conductivity (%IACS) |
1050 | ≥ 61.0 |
1060 | ≥ 61.5 |
1070 | ≥ 62.0 |
1350 | ≥ 61.0 |
Note: Electrical conductivity can be supplied according to customer technical requirements.
The O temper aluminum strip is especially suitable for transformer winding processes that require stable conductivity, flexibility and high edge quality.
Excellent electrical conductivity
Soft temper for easy winding and forming
Good ductility and bending performance
Smooth and clean surface finish
Accurate thickness and width tolerance
Neat slitting edge with low burr
Stable coil quality for transformer manufacturing
Custom specifications available
O soft aluminum strip is widely used in the manufacture of various transformer winding systems and electrical conductor components, such as:
Dry-type transformer winding
Oil-immersed transformer winding
Distribution transformer
Power transformer
Electrical coil winding
Other electrical conductor applications
It is an economical and efficient conductor material for transformer manufacturers requiring good conductivity and reliable winding performance.
Raw Material Inspection → Rolling → Annealing → Precision Slitting → Surface & Edge Inspection → Performance Testing → Rewinding → Packaging
To ensure stable quality, our O soft aluminum strip for transformer winding is manufactured through strict process control, including raw material inspection, precision slitting, annealing treatment and final dimensional inspection.
Each coil can be checked for:
Thickness tolerance
Width tolerance
Surface quality
Edge condition
Coil neatness
Mechanical performance
Electrical conductivity
Our quality control process helps ensure that the aluminum strip meets the technical requirements of transformer winding production.
The aluminum strip is packed with export standard packaging to ensure product safety during transportation and storage. Packaging methods can be customized according to customer requirements.
Eye to wall / eye to sky packaging available
Moisture-proof protection
Plastic film and kraft paper wrapping
Wooden pallet or wooden case
Clear label for each coil
Suitable for sea, land and export transportation
Q1. What does O soft aluminum strip mean?
O soft aluminum strip refers to aluminum strip in annealed temper, which offers good flexibility and formability for transformer winding applications.
Q2. What aluminum grades are available?
Common grades include 1050, 1060, 1070 and 1350 aluminum, depending on conductivity and application requirements.
Q3. What thickness and width can you supply?
We can supply various thicknesses and widths according to customer requirements. Typical thickness ranges from 0.2 mm to 3.0 mm, and width ranges from 10 mm to 300 mm.
Q4. Can you provide custom sizes?
Yes, customized thickness, width, inner diameter, coil weight and packaging are available.
Q5. What is the main application of this product?
It is mainly used for transformer winding, including dry-type transformers, oil-immersed transformers and other electrical winding applications.
Q6. Can you provide samples?
Yes, samples can be provided according to product specification and stock availability.
Q7. How do you control quality?
We control quality through raw material inspection, process monitoring, dimensional testing, surface inspection and final packaging inspection.