C40 steel plate,under EN 10083 standard, we can regard C40 steel plate as high carbon steel. C40 is a high carbon  structural steel with poor welding performance,so it is mainly used for manufacturing wear parts,like Shaft,Gear and so on.

C40 steel plate is one mainly of high carbon steel.EN 10083 C40 steel plate is meduim Carbon Steels are similar to low carbon steel except that the carbon ranges from 0.30 to 0.60% & the manganese from 0.50 to 1.65%. Increasing the carbon content is approximately 0.5% with an accompanying increase in manganese allows medium carbon steels to be used in the quenched & tempered conditions. This steels are of particular importance because of unique combination of strength & toughness after heat treat treatment.

C40 steel plate Chemical analysis -% by mass

At the option of the manufacturer the elements aluminium, titanium, vanadium and niobium may be added singly or in combination for grain size control  purposes.
 Elements not quoted in table shall not be added  to the steel without the agreement of  the purchaser, except for the purpose  of  finishing the heat. 

C40 steel sheet Mechanical properties in the normalized conditions:

1N/mm2=1MPa
Heat treatment conditions

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