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My chosen welding procedure calls for preheat. How much should I preheat the base material prior to welding?

April 26, 2017base chosen material preheat prior procedure welding

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My chosen welding procedure calls for preheat. How much should I preheat the base material prior to welding?

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Preheating is dependent on two primary things: Alloy type and thickness. For most carbon steels- RULE OF THUMB: Preheat 10º F for every “point” (.01%) of carbon content in the base metal.