What is the difference between ASTM A775 vs. ASTM A934?
Two specifications are available for epoxy-coated reinforcing steel, ASTM A775 and ASTM A934. Reinforcing steel bars meeting ASTM A775/A775M Standard Specification for Epoxy-Coated Steel Reinforcing Bars are coated in a straight condition and then bent, whereas ASTM A934/A934M Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars covers bars that are bent prior to coating. In the early 1990s it was believed that bending of the coated bars would reduce the corrosion performance of coated bars. At that time, ASTM A775 required bars to pass a flexibility test that only bent the bars 120 degrees. Coatings would often crack or debond from the steel surface when bent to 180 degrees, reducing their corrosion performance. More recent ASTM A775 specifications require that the bars pass a 180 degree flexibility test. This improved specification has been met through improved surface preparation of the steel prior to coating and use of more flexible coatings. According to th
