It means that our steel is shaped and cut while it’s cold. When steel is hot rolled it is shaped while at a high temperature. The hot rolling process is cheaper, but the heat
expansion and contraction after cutting leads to warping, inaccuracies, and a rough mill-scaled surface that is difficult for paint to adhere to. In contrast, cold rolling has much tighter dimensional tolerances, creating shapes which are consistently accurate and straight. The yield strength of cold rolled steel is also significantly stronger than that of hot rolled.
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