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Up to what percent of carbon content in steel, it is not required to preheat it?

Up to what percent of carbon content in steel, it is not required to preheat it? Correct Answer 0.25% – 0.3%

Low carbon steels are the ones containing low amount of carbon in them, which does not require preheating. The amount of carbon content needed in low carbon steels, is 0.25% to 0.3%, if preheating is to be avoided.

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