118 ‘ Observations on Iron and Steel. 
a] 
if, on the contrary, the change be complete, the fire 
is extinguished, and the steel is left to cool for about 
eight days more, when:the process for making blis- 
tered steel. is finished. 
For small wares, the bars are drawn under the 
tilt hammer, to about half an inch broad and three 
sixteenths of an inch thick. 
The change wrought on blistered steel by the 
tilt hammer, is nearly similar to that effected on 
iron from the refinery by the forge hammer. It is 
made of a more firm texture, and drawn into con- 
venient forms for use. 
German steel is made by breaking the bars of 
blistered steel into small pieces, and then putting a 
number of them into a furnace; after which they 
are welded together and drawn to about eighteen 
inches long; then doubled and welded again, and 
‘finally drawn to the size and shape required for use. 
This is also called shear steel, and is superior in 
quality to the common tilted steel. 
Cast steel is also made from the common blistered 
steel. The bars are broken and put into large cru- 
cibles with a flux. ‘The crucible is then closed up 
with a lid of the same ware, and placed in a wind 
furnace. By the introduction of a greater or smal- 
Jer quantity of. flux, the metal is made harder or 
softer.. When the fusion is complete, the metal is 
Cast into ingots, and then called ingot steel; and 
that which afterwards undergoes the- operation of 
tilting, is called tilted cast-steel.. a 
