Metallurgy Of Cast Iron

INDEX. 617
Silicon — Continued. - PACK.
Percentage required to change the grade of an iron. .150, 155 The influence of, to retard iron absorbing carbon. .205, 208 Its utility to soften, regulate and cheapen mixtures. .207-211 The first to advance the utility of .................. 207, 208
Its power to increase the fluidity and life of molten metal 208 Used as a base for changing the grade of mixtures. .208, 296 Care necessary in using and its evil effects ......... 208, 209
Percentage used in light castings .............. 209-21 1, 281
Point at which silicon hardens iron ........... 209, 281 , 437
The highest percentage permissible in soft castings ........................................... 209, 281 , 283
Causing brittle castings ....................... 209, 222, 283
Example of extremely low silicon in light castings ..... 209
The amount that can be absorbed by iron .............. 210
The percentage in pig most desirable to use for regulating mixtures ...................................... 210
The amount of scrap that four per cent silicon pig may carry ........................................... 211, 279
Its peculiar appearance in fracture ..................... 211
Amount required when total carbon changes in order to keep a uniform hardness ................... 246, 280. 282
Loss of by remelting ...................... 257, 303, 3 r
Low, showing a greater chill on edges of light czisti than excessive use of . . ........................
lags-
Creation of ................................. ^2-
Amount of iron in furnace ...............
Denning the grade of iron by color and Action of basic and acid elements in . . . Chemical relation of iron to ........ .
Percentage of silica in ...............
Weight produced in making iron .....
Methods for disposition of . . .' ..... ...
Manufacture of mineral wool, from. . .
Percentage of refuse carried off by. .. Plans used by furnaces ..............
Loss of iron by, in cupolas .............----147, f 61al tests and