I can find vague mentions of "medical" uses for low background steel, and one specific claim that it's used to shield some rooms or large devices for measuring how much radiation is coming off a person's body. That's pretty niche.
Looking into this point further, I'll agree. I shouldn't have acted on an anecdote without verifying first. The other fact though is one that I'm certain of.
I can find vague mentions of "medical" uses for low background steel, and one specific claim that it's used to shield some rooms or large devices for measuring how much radiation is coming off a person's body. That's pretty niche.