There is creative mode which has exactly that, but personally I'm just fine with the normal block type limits.

The exception to that however, is inertial dampeners. They REALLY need an intermediate (Xanion/yellow would work) and a buff to how strong they are, as they really use a lot of energy (and therefor significantly increase space/size for a build) for not a lot of braking power.

That's not correct, Pokeking.

OP is asking if Hangars can be modded to be made with IRON, instead of Trinium. To my knowledge this is not currently possible, as the blocks themselves are hard-coded and cannot be modded yet.

Yeah Weaver thats what I am looking for but it seems it will not be added in the game and the devs won't allow modding of blocks most probably. So thats that :)

In the meantime, what you can do as a workaround is basically cheat. But only a little.

-Free Play: Check the box that unlocks all Building Knowledge

-Resources: Use /give Wolfhunter 100000 trinium (assuming that's your in-game name, and that's just an arbitrary amount...whatever you would need to get going)

It won't be as satisfying, but it will get you the blocks you want without going into Trinium space. Still...it's not really that scary there. Consider adjusting the difficulty or using a few mods to tweak the game balance to a point where you feel comfortable advancing.