A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The term killed indicates that the steel has been
sufficiently deoxidized to quiet the molten metal when poured into
the ingot mold. The general practice is to use aluminum ferrosilicon
or manganese as deoxidizing agents. A properly killed steel is
more uniform as to analysis and is comparatively free from aging.
However, for the same carbon and manganese content Killed Steel
is harder than Rimmed Steel. In general all steels above 0.25%
carbon are killed, also all forging grades, structural steels from
0.15% to 0.25% carbon and some special steels in the low carbon
range. Most steels below 0.15% carbon are rimmed steel.