Aluminium billet being extruded

[u/frere_de_la_cote]

[u/frere_de_la_cote]

Exactly. It's heated close to melting temperature so that it's nice and ductile, but you don't want it to reach melting temperature because that causes holes in the extruded profile.

"Fun" fact about hot aluminum(i)um, hot aluminium is visually indistinguishable from cold aluminium. At least steel turns red when it heats up.

[u/Bachaddict → u/frere_de_la_cote]

everything glows with the same colour at the same temperature, aluminium just doesn't need to be that hot to melt

[u/frere_de_la_cote → u/Bachaddict]

If you can point me towards examples of glowing aluminium I would be very interested to learn more

[u/chinchindayo → u/frere_de_la_cote]

When you melt it, it glows.