Metallurgy Of Cast Iron

EVILS IN CASTING TEST UARS FLAT. 493
TABLE I CO.— TRANSVERSE TESTS OF ^" SQUARE BARS CAST FLAT.
o«j . (A 0^ Mode of testing. Micrometer measurement. Deflection. Broke at in Ibs. State of fracture. Strength per Hfsq. in Ibs.
I Top up. •504 .180 264 - Sound. 260
2 " •509 -.170 260 " 25 !•
3 Top down. .160 240 " 233
4 .526 .110 1 60 -Small flaw. 145
Difference in strength extremes of sound bars, 27 Ibs. or 11.59 Per cent. TABLE IOI.— TRANSVERSE TEST OF i" SQUARE BARS CAST FLAT.
«*4 O*J i* Mode of testing. Micrometer measurement. Deflection. Broke at in Ibs. State of fracture. Strength per sq. in. in Ibs.
5 Top up. i. 022 .no 1,784 Sound. 1,709
6 " 1.052 .120 1,820 " 1,645
7 Top down. 1.044 .120 1,764 " 1,618
8 1.024 .100 i, 600 1,526
Difference in strength extremes, 183 Ibs. or 11.99 per cent. TABLE IO2.—TRANSVERSE STRENGTH OF I^X/ ROUND BARS CAST FLAT.
"8-oS Mode of testing. Micrometer measurement. Deflection. Broke at in Ibs. State of fracture. Strength per sq. in. in Ibs.
9 Top up. 1.161 .160 2,128 Sound. 2,010
10 " 1.140 .150 1,980 " 1,940
II Top down. 1.171 .140 1,996 " 1,853
12 1.131 .100 1,682 1,674
Difference in strength extremes, 336 Ibs. or 20 7-100 per cent. • TABLE 103.—TRANSVERSE TESTS OF Ij6" ROUND BARS CAST ON END.
O.M . tfl Mode of testing. Micrometer measurement. Deflection. Broke at in Ibs. State of fracture. Strength per sq. in. in IDS.
First flask.
13 14 Cope side Nowel side i. in 1.116 .no .110 1,760 1,772 Sound. 1,815 1,812
Second flask.
15 Nowel side 1.132 .III 1.772 " 1,761
16 Cope side 1. 121 .110 1,720 1,743