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Materials

Aluminium alloy AISi12

Range of application

Common aluminium alloy 4000 series for manufacturing lightweight components or prototypes in the field of automotive and aerospace industries.

Technical data after recommended heat treatment

1 Tensile test at 20°C according to DIN EN 50125
2 Specification according to the material manufacturer’s data sheet.
Yield Point Re 1 170 - 220 N/mm2
Tensile Strength Rm 1 310 - 325 N/mm2
Elongation A 1 2 - 3 %
Young's modulus 2 approx. 75 · 103 N/mm2
Thermal conductivity λ2 120 - 180 Wm/k
Coefficient of thermal expansion (at rt)2 20 · 10-6 K-1

Heat treatment

Stress relief annealing: Heat up in 1 hour to 240 °C. Maintain temperature for 6 hours. Allow the components to cool down in the oven to 100 °C. Afterwards allow the component cooling down at ambient atmosphere.

Chemical Composition

COMPONENT   INDICATIVE VALUE (%)      

Al  Balance
Si  10,5 – 13,5
Mg 0 – 0,05
Fe  0 – 0,55
Mn 0 – 0,35
Ti   0 – 0,15
Cu  0 – 0,05
Zn  0 – 0,10
C     0 – 0,05
Ni   0 – 0,05
Pb   0 – 0,05
Sn   0 – 0,05