Issue #13050: Dwemer scrap metal cannot be smelted
USKP#32.128 The following can be melted into ingots: C8874 Solid Dwemer Metal, C8872 Large Dwemer Strut, C8878 Large Decorative Dwemer Strut, C886C Bent Dwemer Scrap Metal, C8864 Large Dwemer Plate Metal, and C8866 Small Dwemer Plate Metal.
However, "Bent Dwemer Scrap Metal" can be smelted into Ingots, whereas unbent "Dwemer Scrap Metal" [C886A] can't. I think that's a bug.
Other Dwemer items include: AEBF1 Dwemer Cog, C8861 Dwemer Gear, C886E Dwemer lever, C8870 Small Dwemer Lever, and C8868 Dwemer Gyro.
I do not think that finely crafted items like Dwemer Gyros should be smelted, but Cogs, gears and leavers should be smeltable into ingots.
The weights and values do not really correlate, either, with large and small versions weighing the same and having the same gold piece value.
The gold value for pieces that can be melted seem to be derived from the number of ingots they produce, each ingot produced is worth 5 gold.
I doubt you're willing to edit the weight and value of these items, but Dwemer Scrap Metal (C886A) should be made smeltable and produce 3 Dwarven Metal Ingots to be inline with the rest.