ASTM A242 type1 weather resistant steel plate Cu and Cr elements content

Cu: copper can promote the formation of stable and dense rust layer on the surface of ASTM A242 type1 weathering resistance steel plate, and also improve the weather resistance of ASTM A242 type1 weather resistant steel plate. However, the high copper content will cause the thermal brittleness of ASTM A242 type1 weather resistant steel plate during processing, and worsen the surface performance of ASTM A242 type1 weather resistant steel plate, so the content of it is limited to 0.25-0.45%.

Cr: chromium can also effectively improve the weather resistance of ASTM A242 type1 weather resistant steel plate, and also can produce solid solution strengthening. However, too high chromium will reduce the toughness and welding performance of ASTM A242 type1 weather resistant steel plate, so the content of it is limited to 0.40-0.60%.

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