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1145
Aluminum 1145 – Foil & Insulation Grade Coil
1145-H19 / 1145-O
Overview
Aluminum 1145 is a high-purity aluminum alloy (99.45% min Al) primarily used in foil and thin gauge coil applications. Its high purity gives it superior electrical conductivity (~59% IACS) and excellent surface quality for foil production. 1145 is the standard alloy for household foil, capacitor foil, insulation jacketing, and thin-gauge coil stock for stamping and laminating applications.
Chemical Composition
| Element | Min | Max |
|---|---|---|
| Aluminum (Al) | 99.45% | — |
| Silicon (Si) | — | 0.55% |
| Iron (Fe) | — | 0.55% |
| Copper (Cu) | — | 0.05% |
Alloy Designations
UNSA91145
ASTMB209, B373
Common NameFoil Grade Aluminum
Mechanical Properties
Tensile Strength (H19)21 ksi (145 MPa)
Yield Strength (H19)20 ksi (138 MPa)
Elongation (O temper)28%
Tensile Strength (O)11 ksi (76 MPa)
Physical Properties
Density2.70 g/cm³ (0.098 lb/in³)
Melting Point646–657°C (1,195–1,215°F)
Electrical Conductivity~59% IACS
Thermal Conductivity230 W/m·K
Typical Applications
- Household and commercial aluminum foil
- Capacitor foil
- Insulation jacketing and vapor barriers
- Laminating and packaging
- Thin gauge coil for stamping
Fabrication & Joining
- Excellent for rolling to thin gauges
- Superior surface quality for foil
- Good formability and flexibility
- Not heat-treatable
- Weldable, but thin gauge limits methods
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