On the relationship between microstructure, mechanical properties and hydrogen embrittlement of pipe steels

The medium carbon casing pipe steels for oil and gas wells with fine grain bainitic microstructure and with coarse microstructure of ferrite-pearlite were tested. The steel with higher strength and with more dispersed microstructure was less susceptible to hydrogen embrittlement than the another one. The finite element method of load simulation of the specimens with crack was used for assessment of the embrittlement of the studied steel