ASTM A242 Corten Steel Plate
ASTM A242 corten steel is most widely used
Corten Steel or Corten Ten is a weathering steel invented in USA. It contains small concentrations of copper(0.25-0.55wt%) and chromium(0.5-1.25wt%), that help it develop a layer of patina. This layer of rust is mroe adherient and less porous than conventional rust. The latter in fact forms in the water in front of the steel and hence detaches easily.
ASTM A242 is high strength low alloy corten. It is widely used in worldwide.
This grade is equivalent to Q345GNHL 09CuPCrNi-A Q295GNH in China
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