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Full text of "Metallurgy Of Cast Iron"

570
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-              ,| |