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Full text of "Metallurgy Of Cast Iron"

536
METALLURGY   OF   CAST   IRON.
and those of Table 109 by the Riehle Bros., of Philadelphia, Pa. The relative strength per square inch is obtained by dividing: the actual breaking load by the area of the bar, at its point of fracture. (For rule, see page 476.)
TRANSVERSE TESTS   OF   SPECIALTY   IRONS   WITH    ONE,   TWO   AND    THREK SQUARE  INCH AREA TEST BARS.
TABLE I08.—CHILL   ROLL   IRON.
No. of test.	Diam. of bar. Common rule.	Micrometer.	Breaking load.	Area of bar.	Stre'gth per sq. in. in Ibs.	Deflection.
i	r Ks"	1.140"	3.250	I.O2I	3,183	0.105
2	i $/s»	1-655"	9,5oo	2.151 3.042	4,4i7	0.090
3	I 15-16"	1.968"	15,250		5,°r3	0.085
TABLE IOQ.—GUN   CARRIAGE   METAL.
No. of test.	Diam. of bar. Common rule.	Micrometer.	Breaking-load.	Area of bar.	Stre'g-th per sq. in. in Ibs.	Deflection.
4	i Xs"	1.122"	2,780	.988	2,812	O.IOO
5	i W	1.664"	9,250	2.174 2.714	4,254	O.I IO
6       j            i 15-16"		1.859"	11,820		4,355	O.IOO
TABLE HO----CAR   WHEEL   IRON.
No. of test.	Diam. of bar. Common rule.	Micrometer.	Breaking load.	Area of bar.	Stre'g-th per sq. in. in Ibs.	Deflection.
	i Ys"	1.174"	2,200	1.082	2,03.3	0.053
8	i tt"	i.69j"	8,100	2.244	3,610	0.070
9	i 15-16"	2.008"	io,5oo	3.167	4,263	o 072
TABLE III.'—HEAVY   MACHINERY   IRON.
No. of test.	Diam. of bar. Common rule.	Micrometer.	Breaking-load.	Area of bar.	Stre'gth per sq. in. in Ibs.	Deflection,
10 ii	i 1A"	1.187"	2,800	i . 1066	2,530	0.092
	i K"	1.705"	7,100	2 2.S2 3-143	3, m	0,072
12	i 15-16"	2 001 "	11,900		3,786	0.079