Invar Ingot is the iron-nickel alloy of Ala Industrial, and the Alloy Smelter produces it exactly one ingot at a time. Load two iron ingots and one nickel ingot into any input slots — all three slots are interchangeable — and 150 ticks (about 7.5 seconds) later the machine hands out a single Invar Ingot. The smelter draws 8 EU/t under the LV ceiling of 32 EU/t, so one operation costs 1200 EU, and because the output is always a single ingot, every Invar Ingot carries that price in full. There is no invar ore generated anywhere, and neither a vanilla furnace nor blasting can weld the metals together: the smelter is the only source.

Nickel is the real bottleneck of the recipe. It is the scarcest metal Ala Industrial places in the world, and it is already consumed by electronic circuits, so every Invar Ingot is also a circuit not built. Alloying loses metal by design: three ingots go in and one comes out, the same melting loss every alloy in the mod pays — bronze from the same smelter at least returns two ingots for its 1200 EU. A single recipe spends the alloy so far: the Diamond-Tipped Electric Drill takes two Invar Ingots together with three Diamond Dust, a Silver Gear and a regular Electric Drill. Ingots from other mods work as inputs, because the smelter reads the common c:ingots/iron and c:ingots/nickel tags.