A Comparative Study of Hydrogen-Induced Cracking Resistances of API 5L B and X52MS Carbon Steels

Figure 5

Micrographs showing details of crack nucleation from the inclusion of MnS into the API 5L B steel: (a) 400x and (b) 1500x; (c) EDS analysis of the region indicated by an arrow at (b) micrograph.

(a)

(b)

(c)