Hot-rolled steel sheet (HRC): Rolled at high temperatures. Characteristics: Features an oxide scale on the surface (commonly known as "black scale"), relatively large thickness tolerance, good strength and hardness, but generally poor surface finish and flatness. Main uses: Structural components for ships, bridges, vehicles, containers, and welded pipe raw materials, where surface requirements are not critical.
Cold-rolled steel sheet (CRC): Produced by further rolling hot-rolled steel sheet at room temperature. Characteristics: Smooth and bright surface, precise thickness, high flatness, and superior mechanical properties (adjustable through heat treatment). Main uses: Automotive body panels, high-end home appliances (refrigerator and washing machine panels), precision instruments, and substrates for galvanized/color-coated sheets, where high surface and dimensional accuracy are required.
Ruisibo's recommendation: Clearly define your final processing method and product appearance requirements. If subsequent processes involve electroplating, painting, or direct use in visible components, choose cold-rolled steel sheet; if used for heavy-duty structures or internal components, hot-rolled steel sheet is a more cost-effective option.
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