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← TechnologyWhich risk increases in steel bridge construction when high-sulfur steel is welded?
A)Hydrogen-induced cracking near the weld✓
B)Increased ductile fracture toughness
C)Formation of uniform grain growth
D)Higher resistance to fatigue loading
💡 Explanation
Hydrogen-induced cracking risk increases due to the formation of hydrogen sulfide by *sulfur pickup*, which diffuses into the weld microstructure, because it weakens the steel's grain boundaries. Therefore, hydrogen-induced cracking is the risk, rather than enhancing ductility or uniformity which are positive material properties.
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