Xiaomi unveils its 9,100-tonne die-casting cell and own Titan alloy, casting the SU7 rear floor as one part

Xiaomi/Xiaomi Hyper Die-Casting T9100

At the SU7's technology launch, Xiaomi showed its in-house T9100 die-casting cell and an aluminium alloy it developed itself. Together they turn the car's rear underbody into a single casting, removing dozens of stamped parts and hundreds of welds.

• The rear underbody goes from 72 parts to one.
• 840 weld points are removed and production hours fall by 45%.
• The cast part is 17% lighter, per Xiaomi.
• Xiaomi says it is the only Chinese carmaker that develops both the casting machines and the alloy itself.