What is the most important characteristic of p355gh sheet material

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Hot-rolled steel sheet / cold-rolled steel sheet: Steel ingots or slabs are difficult to deform at normal temperature and difficult to process. They need to be heated to 1100 ° C to 1250 ° C for rolling. This P355GH sheet material rolling process is called hot rolling. Rolling at room temperature is generally understood as cold rolling. However, from the point of view of metallurgy, the boundary between hot rolling and cold rolling should be distinguished by the temperature of metal recrystallization, that is, rolling below the recrystallization temperature is cold rolling; Rolling above the recrystallization temperature is hot rolling.

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The basic principle of p355gh sheet material, heat treatment of steel: put the metal workpiece in a certain medium and heat it to a suitable temperature, keep it in this temperature for a certain time, and then cool it at different speeds. Objective: to obtain the desired structure and properties by means of heating, heat preservation and cooling, so as to make the metal workpiece have the required mechanical, physical and chemical properties.

The production process of p355gh sheet material, SA737 Gr B and SA737 Gr C steel plates: open hearth, oxygen blowing converter or electric furnace. The SA737 Gr B and SA737 Gr C steel should be killed steel and meet the requirements of fine austenite grain size in the A20/A20M standard. The material is heated to an appropriate temperature for normalizing to form an austenite structure, but the temperature should not exceed 925.