chemical composition of killed carbon steel
Definition: The term indicates that the steel has been completely deoxidised by the addition of an agent such as silicon or aluminium, before casting, so that there is practically no evolution of gas during solidification. Killed steels are characterised by a high degree of chemical homogeneity and freedom from porosity.
Here is an example 0.04-0.30% of carbon, 0.20-1.50% of manganese, 0.02-0.15% of silicon, 0.04-0.10% of aluminum,
Steel that are generally killed include:
· Steels with carbon contents greater then 0.25%
· All forging grades of steel
· Structural steels with carbon content between 0.15 to 0.25%
· Some special steel in the lower carbon ranges