Semi-finished casting products

In addition to being amused by the phrase “semi-finished casting products,“ I like (and hadn't encountered before) a couple of the specific names of such products:

billet
“a length of metal [like a filled-in tube] that has a round or square cross-section” that's less than 36 square inches in area.
bloom
A billet with a cross-section bigger than 36 square inches.