For a steel with 0.2%C, 0.18%Si, 0.2%Mn, 0.35%Cr, what is the maximum rate of cooling to avoid excessive hardness according to the given data?

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Multiple Choice

For a steel with 0.2%C, 0.18%Si, 0.2%Mn, 0.35%Cr, what is the maximum rate of cooling to avoid excessive hardness according to the given data?

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