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The difference between cold rolled steel sheet and hot rolled steel plate. The carbon content of SMA490BW hot rolled structural steel, hot rolled steel plate is slightly higher than that of cold rolled steel sheet. In the case of little difference in composition, the density of cold rolled steel sheet and hot rolled steel plate is the same. Hot rolled steel plate has characteristics of low hardness, easy processing and good ductility. Cold rolled steel sheet has high hardness, and it is relatively difficult for processing. But it is not easy to deform and has high strength. Hot rolled steel plate can be made into alloy steel plate by adding other elements, and its properties are also excellent compared with other high-quality steel plates.
Generally speaking, rolled plates are easier to handle in a high temperature environment, and the heat treatment of SMA490BW hot rolled structural steel, rolled plates is also very common. Hot rolling can not only greatly reduce energy consumption and save costs, but also improve the processing performance of metals and alloys, that is, the coarse grains in the as-cast state are broken, the cracks are healed significantly, and the processing performance of the alloy is improved.
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Q265GNH coil chemical composition: C: 0.17～0.24, Si: 0.17～0.37, Mn: 0.40～0.70, S: ≤0.035, P: ≤0.035, Cr: 0.80～1.10, Ni: 0.030, Cu: ≤0.030, Mo: 0.15 ~0.25 SMA490BW hot rolled structural steel mechanical properties: Tensile strength σb (MPa): ≥885(90) Yield strength σs (MPa): ≥685(70) Elongation δ5 (%): ≥12 Reduction of area ψ (%): ≥50 Impact energy Akv (J): ≥78