1) Standard.: GOST 5781-82 HRB335, HRB400, SD390, BS4449,BS500,GOST 5781-82 2) Dia.: 12 ~ 32mm ... : GB1499/1998 BS4449 ASTM A 615,GOST 5781-82Grade:HRB335, HRB400,HRB500 Diameter: 12mm-32mm hot rolled rebar Type Deformed steel ... bar Standard Grade a. GB1499.2-2007, HRB335, HRB400, etc. b. ASTM A615 Gr.40, Gr.60, etc. c ...