The discussion focuses on distinguishing between hot-rolled steel and cold-rolled steel. Key identifiers include the surface texture, with hot-rolled steel exhibiting a rougher surface compared to the smoother finish of cold-rolled steel. Additionally, any steel sheet that is 3/16" or thicker is definitively hot-rolled, as cold-rolled sheets do not exceed this thickness. The likelihood of rust on hot-rolled steel further aids in identification.
PREREQUISITESManufacturing engineers, quality control inspectors, and materials scientists who need to identify and differentiate between hot-rolled and cold-rolled steel for various applications.
That's the surest way of telling (and usually, hot-rolled steel is more likely to have rusted). Also, no sheet that's 3/16" or thicker (roughly thicker than gauge 7) can be a cold-rolled sheet.zwwzli said:I know hot-rolled has rougher surface than cold, but anthing else?