Aluminum Foils and Strips for Transformers

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.

Chalco's partner of Aluminum Foils and Strips for Transformers

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.

Aluminum Foils and Strips for Transformers

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 (+)
Thickness	≤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
1050, 1060, 1070, 1350	>0.20-3.00	O	60-95	≥25

Aluminum foil for transformer winding chemical composition

1050 O aluminum foil for transformer winding chemical composition

Element	Standard Value(%)
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	Standard Value(%)
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	Standard Value(%)
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	Standard Value(%)
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.

package of Aluminum Foils and Strips for Transformers

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.

application of Aluminum Foils and Strips for Transformers