Table 2 The fracture toughness and decrease proportion of X80 base metal and weld metal in different environment.

From: Investigating the effect of microstructure difference on hydrogen embrittlement sensitivity of X80 pipeline

Materials

Fracture toughness / kJ·m−2

Decrease proportion / %

Without hydrogen

With hydrogen

Base metal

422

407

3.55

Weld metal

403

294

27.05

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