The usual AlSi10Mg grade, SLM process.
The part looks great but strength is not as high as a 6016 billet CNC machined. In theory, SLM should achieve full melt. In practice, we have porosities and cracks at microscopic level.

A T6 treatment does remove most of these, but also significantly changes the part dimensions ( to beyond our accuracy requirements at least ).
I suppose that the best machines on the market can achieve that full melt but a 250k USD SLM 125 with 400W lasers does not...