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Box Materiali Alluminio ENG

Aluminium-silicon alloys are used. To guarantee the best results in terms of top quality castings, we only use primary alloys.

Alloying effect:
Si = improves the fluidity of the melted alloy. A higher content of silicon makes it possible to achieve castings with thinner walls; however this increases the risk of anomalous retractions in the mass zones.
Cu = improves the compactness and heat dispersion.

To improve machinability, it is recommended for the parts to undergo cycles of T6 heat treatment (that also raise the ensemble of the mechanical properties).

Aluminium GAlSi7
EN AB 42000
     Aluminium GAlSi9
EN AB 44400
     Aluminium GAlSi9Cu1
EN AB 46400
     Aluminium GAlSi10
EN AB 46400
Elem. % Min % Max Elem. % Min % Max Elem. % Min % Max Elem. % Min % Max
Si 6,50 7,50 Si 8,00 11,0  Si 8,3 9,70  Si 8,3 9,70
Fe 0 0,55 Fe 0 0,5   Fe 0 0,80  Fe 0 0,80
Cu 0 0,20  Cu 0 0,08  Cu 0,8 1,3  Cu 0,8 1,3
Mn 0 0,35  Mn 0 0,5  Mn 0,15 0,55  Mn 0,15 0,55
Mg 0,20 0,65  Mg 0,05  0,10  Mg 0,25 0,65  Mg 0,25 0,65
Cr  Cr  –  Cr  Cr
Ni 0 0,15  Ni 0 0,05  Ni 0 0,20  Ni 0 0,20
Zn 0 0,15 Zn 0 0,15  Zn 0 0,80  Zn 0 0,80
Pb 0 0,15 Pb 0 0,5  Pb 0 0,10  Pb 0 0,10
Sn 0 0,15  Sn 0 0,5  Sn 0 0,10  Sn 0 0,10
Ti 0,05 0,20  Ti 0,05 0,15  Ti 0,10 0,20  Ti 0,10 0,20
Others 0 0,15  Others 0 0,15  Others 0 0,25  Others 0 0,25
Al Others  Al Others    Al Others   Al Others 
NB: Data subject to modification according to different foundries NB: Data subject to modification according to different foundries     NB: Data subject to modification according to different foundries     NB: Data subject to modification according to different foundries    
Alloy UNI Name Tensile resistance
Rm (N/mm2)
Yield load
Rp0,2 (N/mm2)
Elongation
A%
GAlSi7 Mg Ti EN AB 42000 140 (F) / 220(T6) 80 (F) / 180 (T6) 2 (F) / 1 (T6)
GAlSi9 EN AB-4440 200 120 1
GAlSi9Cu1 EN AC 46400 135 (F) 90 (F) 1
GAlSi11 EN AB 44000 150/210 80/120 0,9
F = molten raw material  T6 = molten material with heat treatment