Due to work hardening of cold rolled steel plate, a certain degree of toughness is low, but can yield better than that used to cold spring piece parts, at the same time as the yield point is close to the tensile strength, so the use of risk is not predictable, prone to accidents in the load exceeds the allowable load.
1) cold plate used in cold rolling surface nonscale, good quality. The hot surface oxide thickness of hot rolled steel, have difference.
2 hot rolled steel plate toughness and surface roughness is poor, the price is low, while the cold rolled plate of good ductility, toughness, but the price is more expensive.
3) divided into cold and hot rolled steel plate, the recrystallization temperature is provided.
4) cold rolling: cold rolling is generally used in the production of strip, the high speed.
Hot rolled steel plate: hot rolling temperature and forging temperature
5) hot plate surface plating black brown, plating cold rolled plate surface is gray, after plating from the surface smoothness to distinguish, lengzha board smoothness is higher than that of hot rolled steel plate.
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