Selection summary
Overview
8079 is a registered wrought aluminum alloy explicitly listed in ASTM B479 for annealed foil when the ordered product falls within that standard's scope. Its alloy designation is not a finished-package claim: the RFQ needs the exact temper, thickness, width, surface side, pinhole and wettability requirements, cleanliness, winding, splices, inspection, protective packing and the validated laminate, forming or end-use compliance criteria.
This page separates standard-oriented limits from typical reference data. Purchase acceptance comes from the ordered specification and certified material test report.
Names and systems
Identity & standards
Similar designations across ASTM, EN, JIS, and other systems are not automatically interchangeable. Product form and ordered standard control chemistry, properties, dimensions, condition, and testing.
Reference chemistry
Composition
| Element | Reference range | Why it matters |
|---|---|---|
| Iron | Registered 8079 range | Foil strength and rolling response |
| Silicon | Registered 8079 range | Grain and foil-processing control |
| Aluminum | Remainder | Base metal and barrier substrate |
Concise grade-family reference only. Confirm every element limit against the current standard for the exact product ordered.
Condition matters
Reference properties
Annealed and work-hardened foil require distinct order acceptance values.
A qualification route is needed for deep drawing, flexing or lidding claims.
Alloy identity alone cannot establish transmission performance of a converted laminate.
Environment first
Corrosion behavior
The natural oxide film supports ordinary atmospheric stability, while product contact, coatings, adhesives and laminate interfaces control actual service behavior.
Acidic, alkaline, saline and dissimilar-metal contact requires package-system review.
Temperature, concentration, deposits, crevices, stress, surface finish, cleaning, and fabrication quality can change service performance.
Service limits
Temperature & service
Forming, sealing, sterilization, baking and storage temperatures affect foil, adhesive and polymer layers together.
Delivery condition
Heat treatment & condition
8079 foil may be ordered in annealed O or work-hardened H tempers; state the exact temper and required converter response.
Annealing cleanliness, rolling-oil removal and final temper affect wetting, printing, coating and lamination.
Process route
Fabrication
Double rolling can create bright and matte sides; define side orientation for appearance, coating or laminate requirements.
Slitting, printing, lacquering, laminating, embossing and forming require process-specific acceptance and traceability.
Magnetic response: Non-ferromagnetic.
Decision boundaries
Comparisons & substitution
8079, 8011 and 1235 are distinct registered foil alloys; do not replace one with another by thickness, temper label or nominal purity alone.
ASTM B479 lists 8079 and selected other foil alloys for annealed foil within scope, while final product selection depends on converter qualification.
Where it is used
Applications
Ordering scope
Product forms & standards
Annealed foil under ASTM B479 when alloy, temper and end use fall within its scope.
Foil and thin strip ordered with ISO 7271 tolerances or the applicable EN, national or customer specification.
Decision support
Selection guidance
Choose this grade when
- A qualified converter route establishes the required surface, forming, barrier and compliance performance for 8079.
- The purchase specification defines foil attributes and the finished structure's measurable acceptance criteria.
Review another grade when
- A specialized capacitor, battery, aerospace or highly regulated medical/pharmaceutical foil standard controls the product.
- Only the alloy and thickness are stated, without temper, surface, defect, processing or compliance controls.
Before ordering
Procurement checklist
State 8079, exact temper, gauge, width, core, coil mass, winding direction and permitted splices.
State bright/matte side, pinhole, wettability, cleanliness, edge, surface-defect and mechanical-property limits.
State converter process, laminate or coating, end-use declarations, inspection, MTR, packing and storage protection.
Traceable evidence