S355J2 steel plate ASTM A36 hot rolled plate rolling process is controlled rolling process. In the rolling process, the ingot rolling temperature is 1000-1050℃; in the first stage, the low-speed and large reduction rolling process is adopted, the high-temperature stage is 950-1000℃, the rolling speed is 1.6-2.0m/s, the ASTM A36 hot rolled plate single reduction rate is 15-20%, and the cumulative reduction rate is 40-45%, so as to ensure sufficient deformation of ingot. In the first stage, the start rolling temperature is 910-930℃, and the finish rolling temperature is ≤ 870℃.
The steel plate and strip after hot rolling treatment are generally called hot rolled plate. Compared with other steel plate processing industries, ASTM A36 hot rolled plate, hot rolled plate has these characteristics. First, low hardness, easy processing. Compared with other steel needs special mechanical equipment, hot rolled plate is a very convenient for processing. Second, good ductility, not easy to break, good compression capacity, long service life. Third, the manufacturing process is simple, and the price and cost are relatively cheap compared with other steels.
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In September, China's apparent consumption of crude steel was 94.38 million tons, an increase of 15.58 million tons or 19.8% year-on-year. It has exceeded 90 million tons for five consecutive months. From January to September, China's apparent crude steel consumption was 770 million tons, an increase of 63.14 million tons or 8.9% year-on-year. In terms of growth rate, the apparent consumption of hot-rolled sheet and coated sheet (strip) from January to September increased by more than 40% year-on-year, and the growth rates were 42.6% and 42.0% respectively; railway steel and electrical steel strips fell year-on-year, with a decline. They are 12.8% and 1.4% respectively.