Material of hinges for welding

[James3]

Hi

I think I have found the FW documentation:

Explainer: Lid rigidity, hinge force, the CNC Top Cover, and the new 4.0kg Hinge Kit

We recently announced a full CNC version of the Top Cover alongside the 12th Gen Intel Core upgrades for the Framework Laptop. This week, we also launched a new Hinge Kit variant on the Marketplace with 4.0kg force, higher than the default Hinge Kit with 3.3kg force. Since lid rigidity and hinge behavior is sometimes a source of confusion, we wanted to provide more background on it! Top Cover On the original Top Cover in the Framework Laptop, we used an aluminum forming process to shape the li…

Extract:
“We use a high strength steel alloy for the hinge structure, but the size and weight of the lid are still enough for the steel to elastically deform and bounce back.”