Stillmetal Plate
For still armor, the still hull and the Order's clockwork: stillmetal beaten flat.
kinditemcreative tabFluxion: Materials
Currents
Alloy2
Still2What the Loupe reads: 4 in all. The game works them out from its recipes. Wheel of Currents
In the Codex
Entry 
Stillmetal — The metal of things that do not change. Read a Still Grain or a Stillmetal Vein with the Loupe.
Where to get
Caches
Bell Tower treasury, the Stillness- Clock Tower vault, the Stillness
- Hour Vault of Midstep, the Stillness