1000 series aluminum foil is commercially pure aluminum foil with an aluminum content of at least 99.0%. It is widely used where high electrical and thermal conductivity, excellent corrosion resistance, reflectivity and good formability are more important than high mechanical strength.
Common 1xxx-series aluminum grades used in foil products include 1050, 1060, 1070, 1100, 1145 and 1235. The appropriate grade depends on the application, required purity, temper, thickness, electrical performance and forming requirements.
It is important to distinguish 1xxx-series aluminum foil from alloy foil such as 3003 and 8011. Although all are aluminum-based products, 3003 and 8011 contain controlled alloying elements and therefore are not commercially pure aluminum.
1. What Does "1000 Series Aluminum" Mean?
In the aluminum alloy designation system, 1xxx-series alloys are commercially pure aluminum grades containing at least 99.0% aluminum.
The remaining small percentage consists of controlled impurities or minor alloying elements. Different 1xxx grades are distinguished mainly by aluminum purity and the limits placed on elements such as iron, silicon, copper and other constituents.
Common grades include:
| Grade | General Characteristic | Typical Foil Applications |
|---|---|---|
| 1050 | High purity, excellent conductivity and formability | Electrical, industrial and packaging foil |
| 1060 | High purity and conductivity | Electrical and thermal applications |
| 1070 | Very high aluminum content | Specialized electrical and thermal applications |
| 1100 | ≥99.0% Al with good formability | General industrial and packaging foil |
| 1145 | High-purity foil grade | Packaging and specialized foil |
| 1235 | High purity and excellent ductility | Flexible packaging and selected technical foil |
The exact chemical composition should be confirmed against the applicable material standard and mill certificate.
2. Key Properties of 1000 Series Aluminum Foil
High Aluminum Content
The 1xxx series contains at least 99.0% aluminum, with some grades offering significantly higher purity.
Higher-purity aluminum can provide excellent electrical and thermal conductivity, making selected 1xxx grades useful for electrical and heat-transfer applications.
Lightweight
Aluminum has a density of approximately 2.71 g/cm³, significantly lower than many common engineering metals. This allows aluminum foil to provide useful barrier and thermal functions with very low material weight.
Electrical Conductivity
Commercially pure aluminum generally has higher electrical conductivity than most alloyed aluminum grades.
This makes suitable 1xxx-series grades attractive for applications where conductivity is an important design parameter.
Thermal Conductivity
The 1xxx series generally offers high thermal conductivity, making it suitable for selected heat-transfer and thermal-management applications.
Reflectivity
Clean aluminum has high reflectivity for visible light and radiant heat. This property is useful in reflective insulation, lighting components and selected packaging structures.
Corrosion Resistance
Aluminum naturally forms a thin oxide layer when exposed to air. This protective layer provides good resistance to many atmospheric environments.
However, corrosion performance depends on the actual environment, surface condition, alloy and exposure conditions.
Formability
1xxx-series aluminum is generally highly ductile and easy to roll, bend, stamp and form. This makes it particularly useful for thin foil products and applications requiring extensive downstream processing.
3. Typical 1000 Series and Aluminum Foil Products
Not every aluminum foil product is made from a 1xxx-series alloy. The alloy is selected according to the required combination of strength, formability, conductivity and processing performance.
| Product | Common Alloy Examples | Typical Application |
| Household foil | 8011, 1235 | Kitchen wrapping, cooking and baking |
| Food packaging foil | 8011, 1235, 1145 | Containers, lids and flexible packaging |
| Technical/converter foil | 1235, 1100 and selected specialized grades | Laminating and converting |
| Tobacco packaging foil | 1235, 1145 | Tobacco packaging structures |
| PTP pharmaceutical foil | 8011, 8079 | Pharmaceutical blister packaging |
| Electrical foil | Selected 1xxx grades | Electrical and thermal applications |
| Capacitor foil | Specialized high-purity aluminum grades | Electrolytic capacitor electrodes |
The final alloy should be confirmed according to the customer's application and technical specification.
4. Is Aluminum Foil Pure Aluminum?
Sometimes, but not always.
If the foil is manufactured from a 1xxx-series alloy such as 1050, 1060, 1100 or 1235, it is commercially pure aluminum because the aluminum content is at least 99.0%.
However, many commonly used foil products are manufactured from aluminum alloys.
For example:
1235: commercially pure aluminum foil with high aluminum content and good ductility.
1100: commercially pure aluminum with at least 99.0% aluminum.
3003: aluminum-manganese alloy, not pure aluminum.
8011: aluminum alloy containing controlled alloying elements, commonly used for packaging foil.
8079: an 8xxx-series aluminum alloy used in selected packaging and pharmaceutical foil applications.
Therefore, "aluminum foil" does not automatically mean "pure aluminum foil." The alloy number should be checked to determine the actual material.
5. 1000 Series Foil vs 3003 and 8000 Series Foil
| Feature | 1xxx Series | 3003 | 8011 / 8079 |
| Aluminum content | ≥99.0% | Lower than 99% | Lower than 99% |
| Main alloying elements | Very limited | Manganese | Fe, Si and other elements |
| Conductivity | Generally high | Lower | Lower |
| Formability | Excellent | Very good | Very good |
| Strength | Low | Moderate | Moderate |
| Typical priority | Purity and conductivity | Strength + formability | Packaging performance |
| Typical uses | Electrical, thermal, technical foil | Heat-transfer and formed products | Household, food and pharmaceutical foil |
The comparison is general. Actual performance depends on alloy, temper, thickness and processing condition.
6. Thickness and Temper
Aluminum foil is normally supplied in very thin gauges. Typical commercial foil thicknesses can range from approximately 0.006 mm to 0.2 mm, although available thickness depends on the alloy, application and production capability.
Common tempers include:
O: Annealed and highly formable
H14: Strain-hardened, half-hard condition
H18: Hard condition
Other H tempers may be available according to the required mechanical properties.
For applications involving deep forming, lamination or folding, a softer temper may be preferred. Applications requiring higher tensile strength or dimensional stability may require a harder temper.
7. Standards for Aluminum Foil
The applicable standard depends on the product type and destination market.
Commonly referenced standards include:
GB/T 3198 – aluminum and aluminum alloy foil
ASTM B479 – aluminum and aluminum-alloy foil for general industrial applications
EN 546 – aluminum and aluminum alloy foil
Customers should confirm the required standard before production because chemical composition, mechanical properties, dimensions and tolerances can vary between standards.
8. Quality Control When Buying 1000 Series Aluminum Foil
For industrial procurement, alloy designation alone is not enough.
Buyers should verify:
Chemical composition
Aluminum purity
Foil thickness
Thickness tolerance
Width tolerance
Tensile strength
Elongation
Surface quality
Pinholes where applicable
Roll dimensions
Core specifications
Packaging condition
A Mill Test Certificate (MTC) or equivalent quality document can be requested to verify the supplied alloy and relevant mechanical and chemical properties.
For specialized electrical, capacitor or technical applications, customers should also provide application-specific requirements such as conductivity, surface condition or electrical performance.
9. How to Choose the Right Aluminum Foil
The right grade depends on the final application.
Choose 1xxx-series aluminum foil when:
High aluminum purity is required.
Electrical conductivity is important.
Thermal conductivity is important.
Excellent formability is required.
High reflectivity is useful.
Very high mechanical strength is not the primary requirement.
Consider 8xxx-series foil when:
Higher strength than some pure-aluminum grades is useful.
Packaging or pharmaceutical foil is required.
Specific forming and converting performance is needed.
Consider other aluminum alloys when:
Higher strength is required.
The foil or sheet will undergo demanding forming.
Specific mechanical or thermal properties are required.
10. How to Request a 1000 Series Aluminum Foil Quote
For an accurate quotation, provide:
Alloy + temper + thickness + width + quantity + application + standard + surface requirement + core specification + packaging requirement.
For example:
1235-O aluminum foil, 0.05 × 500 mm, bright finish, 2 MT, GB/T 3198, cardboard core, export packaging.
For technical applications, also provide the required conductivity, mechanical properties, pinhole limits, dimensional tolerances or other performance requirements.
GNEE can supply aluminum foil in different alloys, tempers, thicknesses and customized widths. For large-volume or technical projects, customers can confirm the material specification, inspection requirements, packaging, production schedule and delivery terms before placing an order.
Key Takeaway
1000 series aluminum foil is commercially pure aluminum foil with at least 99.0% aluminum, while 3003 and 8000 series foils are aluminum alloys containing controlled alloying elements. The 1xxx series is generally preferred when purity, conductivity, corrosion resistance and formability are important.
For packaging, electrical, thermal or technical applications, the final selection should be based on the required alloy, temper, thickness, width, mechanical properties and applicable standard, rather than simply choosing the highest aluminum purity.
