in the latest build for 1.7.10 the tin plates are uncraftable. It is caused by a double entry in material component config for tin plates (after enabling the 'per item' setting), the first one being false and the second one being true.
After deleting the false entry it works, another fix is by enabling the global setting for unused plates. Maybe a hotfix?
EDIT: Actually it doesn't work after deleting the entry, tin plates come back to life ONLY after enabling the global setting for unused plates. After deleting the entry it comes back after loading the game.