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Aluminium AlSi10Mg

Application: Aluminium AlSi10Mg is a typical casting alloy used for parts with thin walls

and complex geometry. It offers good strength, hardness and dynamic properties and is therefore also used for parts subject to high loads. Parts in Aluminium AlSi10Mg are ideal for applications which require a combination of good thermal properties and low weight. They can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required. Parts are fully dense, with similar properties to cast or wrought parts. Conventionally cast components in this type of aluminium alloy are often heat treated to improve the mechanical properties, for example using the T6 cycle of solution annealing, quenching and age hardening. The laser sintering process is characterized by extremely rapid melting and solidification. Therefore such hardening heat treatments are not always required for laser sintered parts, but rather a stress relieving cycle of 2 hours at 300 °C (572 °F). Due to the layerwise building method, the parts have a certain anisotropy, which can be reduced or removed by appropriate heat treatments.

Material Specification

Typical applications: · Prototype castings. · Lightweight enclosures. Technical Data:

Typical achievable part accuracy Smallest wall thickness Volume Rate + 100 µm approx. 0.3 - 0.4 mm 4.1 mm3/s Al Si Fe Cu Balance 9.0-11.0 wt% < 0.55 wt% < 0.05 wt% As built Tensile Strength Yield strength (Rp 0.2%) Modulus of elasticity Elongation at break Hardness Fatigue strength ** - vertical direction (Z) - horizontal direction (XY) - vertical direction (Z) - horizontal direction (XY) - vertical direction (Z) - horizontal direction (XY) - vertical direction (Z) - horizontal direction (XY) - vertical direction (Z) - horizontal direction (XY) - vertical direction (Z) - horizontal direction (XY) - vertical direction (Z) 445 MPa ± 20 MPa 405 MPa ± 20 MPa 275 MPa ± 10 MPa 230 MPa ± 10 MPa approx. 70 + 5 GPa approx. 65 + 5 GPa 6.5% + 2% 3.5% + 2% 120 + 5 HBW 97 ± 7 MPa approx. 103 + 5 W/moC approx. 119 + 5 W/moC approx. 920 + 50 J/kgoC approx. 910 + 50 J/kgoC approx. 173 + 10 W/moC approx. 175 + 10 W/moC approx. 890 + 50 J/kgoC approx. 900 + 50 J/kgoC Mn Mg Ni Zn < 0.45 wt% 0.2-0.45 wt% < 0.05 wt% < 0.10 wt%

Chemical Properties:

Material composition Pb < 0.05 wt% Sn < 0.05 wt% Ti < 0.15 wt%

Mechanical Properties:

Heat treated * 335 MPa ± 20 MPa 325 MPa ± 20 MPa 225 MPa ± 10 MPa 220 MPa ± 10 MPa approx. 70 + 5 GPa approx. 65 + 5 GPa 11% + 2% 7% + 2%

Thermal Properties:

Thermal conductivity (at 20oC) Specific heat capacity

* Stress relieve: anneal for 2 h at 300ºC (572ºF) ** Fatigue test with test frequency of 50 Hz, R = -1, measurement stopped on reaching 5 million cycles without fracture

Source: EOS

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