3xxx · Manganese alloy
3003 aluminium — composition, properties and extrusion notes
Manganese-bearing alloy — about 20% stronger than 1100 with similar workability.
How it compares
Relative to the other grades we extrude. This is a selection aid, not a specification.
Mechanical properties
| Temper | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| O | 110 | 40 | 20 | 28 |
| H14 | 150 | 145 | 8 | 40 |
Typical values for extruded product. Minimum guaranteed values depend on temper and product form — the mill certificate governs.
Composition limits
| Element | Limit (%) |
|---|---|
| Si | 0.60 |
| Fe | 0.70 |
| Cu | 0.05–0.20 |
| Mn | 1.0–1.5 |
| Zn | 0.10 |
| Al | remainder |
Single figures are maxima; ranges are the permitted window.
Working with this alloy
- Density
- 2.73 g/cm³
- Common tempers
- O, H12, H14, H22
Physical properties
| Property | Value |
|---|---|
| Thermal conductivity | 193 W/m·K |
| Melting range | 643–654 °C |
| Electrical conductivity | 41 % IACS |
When to use it
Not heat-treatable. The manganese addition gives it useful strength while keeping it easy to form and weld.
Typical applications
- Heat exchanger tubing and fins
- Cooking utensils and cabinets
- Roofing and siding
- Storage tanks
Other alloys
1060
99.6% pure aluminium for conductivity, ductility and chemical resistance.
1100
99.0% pure aluminium — the workhorse of the commercially pure grades.
5052
The strongest common non-heat-treatable sheet alloy, and the marine standard.
6005A
A stronger structural alternative to 6063, developed for extruded transport profiles.
6060
A close relative of 6063, tuned for a slightly brighter anodised finish.