8xxx Series
Other Elements (Li, Fe, etc.)
Overview
Specialized properties depending on alloying elements
Properties vary significantly based on specific alloy
Applications
Common Alloys
Properties
Manufacturing Process
Step 1
Material Preparation
Specialty alloying elements (Fe, Si, Li, etc.) are precisely weighed; ultra-high-purity base aluminum used for foil-grade products.
Step 2
Melting & Alloying
Fine alloying at 700–740 °C with precise composition control; inline melt filtration removes inclusions critical for foil rolling.
Step 3
DC Casting
Cast into thin rolling slabs (300–500 mm thick); rapid solidification creates fine intermetallic dispersoids needed for foil rollability.
Step 4
Hot Rolling
Initial breakdown rolling at 450–500 °C reduces slab to 4–6 mm coil; rolling schedule optimised to avoid surface cracking.
Step 5
Cold Rolling & Foil Rolling
Sequential cold rolling passes with intermediate anneals reduce gauge down to final thickness (as thin as 6 μm for foil products).
Step 6
Annealing & Inspection
Final soft anneal at 220–260 °C; pin-hole detection, thickness verification by X-ray gauge, and foil integrity tests confirm quality.
Step 1
Material Preparation
Specialty alloying elements (Fe, Si, Li, etc.) are precisely weighed; ultra-high-purity base aluminum used for foil-grade products.
Step 2
Melting & Alloying
Fine alloying at 700–740 °C with precise composition control; inline melt filtration removes inclusions critical for foil rolling.
Step 3
DC Casting
Cast into thin rolling slabs (300–500 mm thick); rapid solidification creates fine intermetallic dispersoids needed for foil rollability.
Step 4
Hot Rolling
Initial breakdown rolling at 450–500 °C reduces slab to 4–6 mm coil; rolling schedule optimised to avoid surface cracking.
Step 5
Cold Rolling & Foil Rolling
Sequential cold rolling passes with intermediate anneals reduce gauge down to final thickness (as thin as 6 μm for foil products).
Step 6
Annealing & Inspection
Final soft anneal at 220–260 °C; pin-hole detection, thickness verification by X-ray gauge, and foil integrity tests confirm quality.
Chemical Composition
EN 573-3 / AA
Max % unless range shown. Balance: Al.
| Alloy | Chem. Symbol | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti |
|---|---|---|---|---|---|---|---|---|---|
| 8011 | AlFeSi | 0.50–0.90 | 0.60–1.0 | 0.10 | 0.20 | 0.05 | — | 0.10 | 0.08 |
| 8079 | AlFe1.2Si | 0.05 | 0.70–1.3 | 0.05 | 0.05 | 0.05 | — | 0.10 | — |
| 8176 | AlFe1Si | 0.03–0.15 | 0.40–1.0 | 0.05 | — | — | — | — | — |