Fusion is the alloy add-on for SimpleCore/Simple Ores2. It adds steel (and steel items) and the fusion furnace (an alloy furnace) by itself; if you also have Simple Ores 2, it adds 3 more alloys and items made from them: bronze, thyrium and sinisite.
Please see http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1279863-simpleores-2-by-alexndrthegr8st for information.
Automation notes by side:
Top: inserts into catalyst slot
Bottom: extracts from output slot, inserts into fuel slot (probably)
Back: inserts into fuel slot.
Front: also extracts from output slot
Left: inserts into left input slot
Right: inserts into right input slot