Ferro Chrome is an alloy with 58% to 65% chrome, 8.5% max carbon, 0.05% max phosphorus, 4% max silicon and 0.05% max sulphur. With a chrome content from 60% minimum, there are several variations on High Carbon Ferro Chrome with carbon contents of.

Size
Specification of Ferro Chrome
SiMn High Carbon Ferro Chrome
Cr 58 to 65%
C 8.5% Max
Si 4% Max
P 0.05% Max
S 0.05% Max