Specification Value Test Method Penetration @25°C 40-50 ASTM D-5 Specific Gravity @25°C 1.01-1.06 ASTM D-70 Softening Point °C 52-60 ASTM D-36 Flash Point °C 250 min ASTM D-92 Ductility @25°C 100 min ASTM D-113 Loss on Heating %wt. 0.2 Max ASTM D-6 Drop in Pen. After Heating % 20 Max ASTM D-6 & D-5 Solubility in TCE %wt. 99.5 min ASTM D-4 Spot Test Negative A.A.S.H.T.O.T 102 Bitumen Penetration Grade 40/50 is a standard penetration grade Bitumen usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties. This grade of Bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses.