Material Group 24.1 ISO/TR 15608:
Aluminium-silicon (Al-Si alloy) cast alloys with 5 % < Si ≤ 15 % and Cu ≤ 1 %
Al-Si alloys
Among the different aluminium alloy alloys, the most used is the Aluminium-Silicon
(Al-Si) alloy with Si concentrations in the range of 5 to 15 wt.%. Si increases the fluidity of the molten metal, therefore improving the castability. Increased tensile strength, good corrosion resistance, good weldability as well as machinability are also results of alloying with Si. The addition of Cu gives a better machinability and increases strength at temperature.
Aluminium-silicon-castings alloys with magnesium: see Group 24.2
Typical materials in group 24.1
| Name | Number | Standard | Product | UNS |
|---|---|---|---|---|
| EN AC-AISi9 | EN AC-44400 | EN 1706 | Castings | |
| EN AC-AISi12 | EN AC-44100 | EN 1706 | Castings | |
| – | – | ASTM B-26 | Casting | A24430 |