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I briefly browsed through Clause 7 in the 2010 edition of D1.1 and didn't see any reference to HR or CR mentioned in any of the references to base materials or finishes.
I agree with Lawrence, another D1 mystery.
Confession: with all of the stud welding that was performed and inspected, nearly on a daily basis, in my previous employment as a QC manager at a fab shop, I never filled out one of those stud welding forms. I suppose other than the physical evidence of bend testing, someone could have taken objections to my testing regiment and called me out on it. Lots of auditors (customers, TPIs, and the AISC) had passed through those doors in those 30 years while I was there and that was one piece of paperwork that was never reviewed/audited in all of that time there.