Which EN standard steel grade is Corten A hot rolled plate equivalent

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Bridge steel plates are steel plates specially used to build railway or highway bridges. It is required to have high strength, toughness and bear the load and impact of rolling stock, and have good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. The steel Corten A hot rolled plate for tie-welding bridges should also have good welding performance and low notch sensitivity。

Normalizing is a special case of annealing, the effect is similar to annealing, but the microstructure obtained by normalizing is finer. For low or medium carbon steel, normalizing can improve hardness and machinability. For Corten A hot rolled plate medium carbon steel and low alloy steel, normalizing can refine grain and uniform structure and reduce hardness. For high carbon steel and high alloy steel, normalizing can eliminate the network carbide produced by forging and improve the homogeneity of the preparation heat treatment structure.

Chemical composition for A514 Gr A alloy steel:
C 0.15-0.21, Si: 0.40-0.80, Mn: 0.80-1.10, P: 0.035, S: 0.035: B: 0.0025, Cr: 0.50-0.80, Mo: 0.18-0.28, Zr: 0.05-0.15
Mechanical properties for A514 Gr A alloy steel:
Thickness (mm); Yield strength (≥Mpa); Tensile strength (Mpa); Elongation in 50mm ≥,%
T≤65;690;760-895;18

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