Which risk increases when welding high-strength steel without preheating electrodes?

💡 Explanation

When high-strength steel is welded without preheating, rapid cooling occurs, causing hydrogen diffusion into the weld metal where it embrittles grain boundaries leading to hydrogen-induced cracking. Therefore, cracking is most likely rather than increased strength, reduced corrosion, or improved ductility, which require different welding parameters and materials.

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