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What is Preheating Techniques in Welding about?

Preheating involves heating the base metal prior to welding to minimize cracking and ensure specific mechanical properties. It must be used when codes specify and when needed for high-strength steels. Annex XI of the AWS D1.1-96 code provides two methods for determining preheat temperatures: HAZ hardness control and hydrogen control. Preheat can be applied via furnace or heating equipment and must meet minimum temperatures for carbon steels or follow narrow ranges for quenched and tempered steels.

Author

sjmuda

Language

EN