Carbon steel residual element content

In cases where the test certificate, or steel specification, only gives data on carbon and manganese contents, information for C Mn steels suggests that an appropriate allowance for residual alloying elements to be added to the CE would not exceed 0.03%. For steels produced by an all-scrap route, this may be too low values as high as 0.08% have been found necessary, while 0.05% is a more typical value. 

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