IDENTIFICATION GUIDE FOR REINFORCEMENT STEEL .
IDENTIFICATION GUIDE FOR REINFORCEMENT STEEL DOWEL BAR PRODUCERS August 22, 2014 . ... surface of one side of the bar to denote the producer''s mill designation, bar size, type of steel, and, for Grade 420 (Grade 60), a grade mark indicating yield strength, and for Grade 520 ... or one grade mark line continued for at least five deformation ...