Experimental study on fracture toughness of OS-F101 415F pipeline steel and its welded joint

摘要

The fracture toughness of OS-F101 415F pipeline steel and its welded joint had been systematically studied. The present results suggest that OS-F101 415F pipeline steel and its welded joint all have relatively high fracture toughness values at 0℃, which are higher than 0.30mm. The main reason for such results is the over 80% acicular ferrite in their microstructure.