All casting recipes for ingots need 112 mb to complete a recipe, and all casting recipes for blocks need 1000mb. This is only really noticeable when making datapacks with this mod but it does mean that, without any datapacks, you will end up falling short when making either steel recipes by a very small amount.

This doesn't seem intentional since this enum in the repo shows ingot molds need 112mb but all casting recipes in this mod as suggested by JEI need fluids in multiples of 111 as seen here.

I'm guessing, since blast furnace recipes produce fluids in multiples of 111, this likely wasn't done on purpose. In addition, it's not entirely clear how much fluid is needed for the block mold.

Hey did you manage to make a datapack for new casting recipes? I am trying but the new recipe is not showing up and doesnt work.

For example I am trying to add molten tin to it. I specified the fluid and item ID correctly

data > tfmg > recipes > casting >tin.json