I b208, you could make a crucible with NO perk. If you found a trader with a forge and workbench, and you farmed up the stone, dirt, mechanical parts, and forged the iron, you could make a crucible day....well, probably no earlier than day 2, considering the time required to get 1200 dirt, 800 stone, and then wait ~15 minutes for the crucible itself.
I made a crucible several times in at least 3 different B208 games well before the steel perk (and before workbench in some of them). It allowed me to repair weapons and tools i bought, found, or earned.
In B221, crucible (i tested carefully in new games) and forged steel itself (I heard from a few different sources, though it irrelevant, since you need the crucible anyways) are BOTH gated behind rank 3 of hammer and forge.
I tested and made absolutely sure of what I was talking about before i posted. If you're going to call someone out, you could at least do that much yourself.