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Full text of "Metallurgy Of Cast Iron"

Test Bars—Continued.                                                         PAGE.
Making records of depressions at point of bearing in noting deflection of   ................................555, 576
The  adoption  of  the  round  bar  for  testing",  by  the  A.   F. A..........................................'.......  576
Design and  sixe of the A.  F.  A. bars,  used for trans-verse  and   tensile   tests   .........................582, 583
Testing Iron, General—
.
I lie character ot strain* that cast iron is general!}* sub-
j ect ed to .......................................220, 439
Advisability of taking drill tests and testing chilled
castings ........................................259, 432
Effect of different temperatures in varying the depth of
chilled iron ............................262, 372-374, 433
Melting of brands, grades or mixtures in small cupolas
for ..............'..................267, 325, 362, 495-502
Met hods that are misleading in................277, 492, 576
The best test for softness in light castings.............. 283
Utility of transverse, crushing and impact tests.439-445, 448
Methods for testing car wheels........................ 440
Erratic and impractical records compiled previous to
ify>5 ............................................449, 539
Evils of easting bars llai fur.......................449, 488
Anah-M-s of tlu- corner and middle- body of square test
bar;,.............................................451-453
Comparative transverse, deflection and tensile tests of
iY&' round bars in gun metal, chill roll, car wheel and
four other specialties (analyses shown page 299).... 466 Comparative tests showing that for the same area round
bars record a greater strength than square ones...... 469
The first tests collected of different grades of iron...... 470
Opportunities offered for deception or jugglery in testing
bars cast flat ....................................... 492
The cost of a set of appliances for casting and testing
i! s~inch   round   bars.................................  499 of test bars made for the A. F. A......... 541