Hot rolled polishing hardox 450 steel grade

The corrosion resistance of stainless steel depends on the alloy elements contained in the steel. The chemical composition of Hardox 450 steel grade, stainless steel and acid resistant steel is different. The former is not necessarily resistant to chemical medium corrosion, while the latter is generally stainless. The better stainless steel also contains nickel. Adding molybdenum can further improve the atmospheric corrosion resistance of stainless steel, especially the corrosion resistance of chloride containing atmosphere.

With the increase of carbon content in the steel material, the yield point and tensile strength increase, but the plasticity and impact decrease. When the carbon content is more than 0.23%, the welding performance of the steel material becomes worse. Therefore, the carbon content of low alloy structural steel used for welding is generally less than 0.20%. The high carbon content can also reduce the atmospheric corrosion resistance of steel material, and the high carbon steel in the open air is easy to rust; in addition, carbon can increase the cold brittleness and aging sensitivity of Hardox 450 steel grade etc. steel material.

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 Hardox 450 steel grade 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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