Metallurgy Of Cast Iron

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METALLURGY OF CAST IRON.
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TABLE 126.—TENSILE STRENGTH PER SQUARE INCH OF UNFINISHED AND FINISHED BARS IN TABLES 115 TO 125.
Ap'rox. Orig. Diam. A B C G H I J K I,
•57 16,000 16,205 18,265 31,000 21,760 23,620 22,960 21,650 33,610
1.14 13,700 15,865 15,865 26,560 14,260 21,850 18,210 17,340 29,57°
1.70 12,520 I3,H5 14,170 19,340 15,320 11,290 16,940 16,220 22,680
2.27 11,015 11,405 12,060 I5o3o 10,610 9,780 15,490 12,700 17,400
Fin. Diam.
•56 13,762 19,000 17,386 27,080 21,600 18,040 23,440 32,880
1-13 13,490 15,375 14,994 24,480 14,920 14,120 20,070 3i,33o
1.69 12,230 12,525 ii,5/o 17,810 13,380 11,100 18,630 20^890
TABLE 127.—CHEMICAL ANALYSES OF MIXTURES A TO L, TABLES 115 TO 125.*"**
Series. Class of Iron. Silicon. Sulphur. Manganese. Phosphorus. G. Carbon. 1 3 O T. Carbon.
Af Ingot mold ............ 1.67 .032 .29 .095 3-44 •43 3.87
B Dynamo frame ... i-95 .042 •39 •405 3-23 -59 3.82
C L/ight machinery.. 2.04 .044 •39 .578 3-52 .32 3.84
D Chilled roll ............ •85 .070 •15 .482 .06 2.30 2.36
E Sand roll .......... .72 .070 .17 •454 None. 3.04 3.04
Ft Sash weight ......... .91 .218 .24 .441 .20 2.51 2.71
G Car wheel ... ...... •97 .060 .40 .301 3-43 •74 4.17
H Stove plate ....... 3-iQ .084 •38 1.160 3.08 •33 3-41
I Heavy machinery. 1.96 .081 .48 •522 2.99 •33 3.32 •
J Cylinder. 2.49 .084 •47 •839 2-99 .40 3-39
K Novelty .......... 4.19 .080 .67 1.236 2.85 •03 2.88
Iy Gun metal ............. 1.32 .044 •43 .676 2.62 •50 3-*2
f All pig iron. J Nearly all burnt scrap.
Ji**xhe above analyses of Table 127 were determined from drillings obtained from i" square dry sand bars, taken from the respective casts.gth per square inch and table 127 gives the analyses, both of which are fully explained on page 555.SlolrlciiKc .i! : •,» l'fjii]-.y!v,iu;.i M.ii!« ,«!.'.. <•*'•, t«.Mii«! i v, I'it l:,l.ui>;, P,i,ll. The chilland j^reen sand showedast on end, us such will tfive truer results than the [J4™inch round bar in general practice, especially in making comparison <>i; the widest ranges in grades.temper '' or damp- ,| |