This topic applies to most of your mods.
Many of the items you I introduced (aluminum plates, the chemical stuff, etc) take the place of some vanilla item, and end up being slotted into the science ingredient list, which requires mass production of them.
But many of the alloys are used mainly for things like mall items (bronze, the numbered aluminum alloyed, etc), which means they're not really needed to be mass produced.
This feels very weird. I think finding a way to integrate all of them into the progression tree would improve the experience, since adding more resources that don't end up being used is sorta pointless.