ok so i looked through the books and the ars arcanum for all the copies i had and here's what i found:
1. all the base metals pull and all of the alloys push. the pulling metals have the little dot outside of the crescents and pushing metals have them inside the crescents.
2. also i found a pattern when moving around the circle. start with steel and move anti-clockwise. alloy, base, base, alloy. those are for the basic eight (upper tier) external metals. the same pattern holds for the internal metals and continues to the lower half of the circle. so malatium and electrum both push and are alloys and gold and atium are base metals and push. so if the last quartet of unnamed metals follow the same pattern then the two next to gold and atium are base metals and the ones below steel and pewter are the pushing alloys. so if my theory holds true the external metal below steel is duralumin and the external next to atium is aluminum. the internal metal above aluminum is whatever elend ate (assuming its the base metal which i think it is since it makes sense that a metal making you a mistborn would pull on something internally) and its alloy is next to it.
3. i couldn't find a pattern to the spikes piercing the crescents but that doesn't mean there isn't one.
Then just for the fun of it i looked up the alloys to find out what they are composed of. steel is iron and carbon and duralumin is aluminium and copper. pewter is tin/copper. brass is zinc/copper. bronze is copper/tin. electrum is gold/silver. no idea what atium is alloyed with to make malatium.