Bitumen Grade 60 / 70 Specification as per National Iranian Oil Company (NIOC) : Test Method A. S. T. M. Specific Gravity at 25 DEG C 1. 01 06 D. Penetration AT 5 Softening Point 49 56 36 Ductility CMS 100 MIN 113 Loss on Heating PCT WT 0. 2 MAX 6 Drop in after 20 Flash 250 92 ...