Metallurgy Of Cast Iron

Combined carbon......................................................63
Silicon......................................................................58
Manganese...............................................................15
Sulphur....................................................................05
Phosphorus............................................................25
•45
TABLE 46—ANALYSIS OF A REMARKABLY STRONG CAR WHEEL. BY MR. A. WHITNEY.
Combined Carbon. Graphite. Manganese. Silicon. Phosphor. Sulphur. Copper.
1.247 3-083 0.438 0-734 0.428 o.oSo o 029
In Tables 47 to 50 we show an analysis of car wheels ^iven in a paper by Mr. S. P. Bush before the Master Car Builders' Association, which were obtained through the labors of Mr. F. D. Casanave and Dr. C. B. Dudley, both of the Pennsylvania Railway Co. In referring to these wheels, Mr. Bush says: " Twenty wheels were selected from those in service, representing some of the principal makes of the country, all of which were subjected to the thermal test, ten passing it successfully and ten failing. Chemical analyses were made of the iron of which these twenty wheels were cast, two sets of samples being taken — one from the body, or gray iron, and the other from the chill. The result of these analyses is as follows:
TABLE 47—ANALYSES OF THE GRAY IRON. STOOD THERMAL TEST.
T. C. G. C. C. C. Man. Phos. Silicon. Sulphur.
3-68 3-00 0.68 0.64 0.30 0.56 O. II
3-54 2.74 0.80 0.28 0.47 0.65 O. 10
3-50 3-48 0.02 0-35 0.40 0-45 0.13
3-65 2.41 1.24 0.31 o.53 0-57 o. 16
3-73 2.89 0.84 0.88 0.38 0.50 O.I I
3-63 3-03 0.60 0.44 0.43 0.56 0.12
3.67 2.70 0.97 0.24 0.38 0-53 O.IO
3-67 3-03 0.64 0.32 0.42 0.47 0.16
3.64 2-53 i. ii 0-33 0.50 0.62 0.12
3-86 3.3i 0-55 0.30 0.36 0.63 o.n