What is aluminium 1100?
Aluminium 1100 is a typical industrial pure aluminium alloy. It has excellent corrosion resistance and benefits from increased strength at low temperatures but is not suitable for use at higher temperatures as strength is compromised.
Similar or obsolete designations and trade names
- O, F, H111, H112, H12, H14, H22, H24
- H32, H34, 38
- T4, T6, T651, T6511
- T7351
- H18
Other designations include
- UNS J91100
- 1100-O
- UNS A91100
- ISO Al99.0Cu
- NF A45 (France)
- CSE 990C (Canada)
- AA1100-O
- Al1100-O
- Standards: ASTM B209, EN573, EN48
Main attributes
- Excellent corrosion resistance
- Increased strength at sub-zero temperatures
- Loses strength at high temperatures
- Cannot be heat treated
- Great electrical conductivity
- Great thermal conductivity
- Low density
- Low strength
- High ductility
- Reflective finish
- Excellent welding characteristics
- Non heat treatable
Finishing & treatments
Aluminium 1100 is not suitable for heat treatment other than to produce the annealed form and ‘O’ temper.
See our Finishing Processes page for further information on services that we can facilitate.
Technical properties
Physical properties
| Physical Properties | Value |
| Density | 2.71g/cm³ |
| Melting Point | 643 - 657.2 °C |
| Thermal Expansion | 23.6 x 10⁻⁶/°C |
| Modulus of Elasticity | 68.9 GPa |
| Thermal Conductivity | 222 W/m·K |
Mechanical properties
| Mechanical Properties | Value |
| Tensile Strength | 89.6 MPa |
| Hardness Brinell | 23 |
| Elongation at Break | 15–28% |
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