Which risk increases in a welded steel bridge if improper preheating during joint construction is practiced?

💡 Explanation

When preheating is insufficient, rapid cooling occurs after welding, increasing hydrogen solubility and trapping it within the weld metal, resulting in hydrogen-induced cracking which leads to brittle fractures. Therefore, hydrogen-induced cracking is the increased risk. Electrode, Carbon monoxide or oxidation effects require specific welding process failures.

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