I set off mixtures of both copper and Iron thermite simultaneously. The 250K sub video is taking a lot longer than I anticipated but here is something to tie you over till it comes out. :) an old video on the subject: https://www.youtube.com/watch?v=UsmsvA8cB3o Energy released: Copper thermite 4.5kJ/g Iron thermite 3.9kJ/g TNT 4.1kJ/g Help me make videos by donating here: https://www.patreon.com/CodysLab Music: 'RoofTops'