CAST IKON AND PIG IRONS
Cast Iron from Watertown Arsenal Foundry.
No. of test.	Mark.	Description.	Chemical composition.								Diam- eter.	Tensile strength per square inch.	Fracture.	Specific gravity.
			Carbon.			Man- ga- nese.	Sili- con.	Sul- phur.	Phos- phorus	Cop- per.				
			Total.	Graph- itic.	Com- bined.									
6438 6439 6447 6454 6459 6460 6463 6188 6486 6489 6487 6494 6499 6502 6506 6512 6513 6514 6515 6521 6525 6527 6529 6533 6535 6559 6562 6563 6568 6571 6575 6576 6578 6579 6582	162 165 167 170 175 176 179 181 183 184 186 189 191 192 194 195 197 199 200 201 202 205 206 207 208 217 219 220 223 225 229 231 233 234 236	3״ shell										Inches. 1.129 1.129 1.129 .505 1.129 1.129 1.129 .505 1.129 .505 1.129 1.129 1.129 .505 .505 .505 .505 .505 .505 .505 . 505 .505 .505 .505 .505 .505 .505 .505 .505 .505 .505 .505 .505	Pounds. 25,200 26,100 25,840 29.900 23.500 26,790 25,980 24.900 20,300 25.450 28,040 27,100 23,180 25.000 26,400 26.900 29.450 28.000 28.900 32.000 27.500 29,750: 30,250 29,000: 26.500 25.500 26.000 28.500 29.550 29.550 29,600 31.000 29.000 28.900 28.500	Fine granular, gray	 	do		7.210 7.229 7.062
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			do												Granular, gray	 Fine granular, gray	 Fine and medium coarse granular, gray. Granular, gray	 	do			 	do	 Granular, light gray	 	do				 	do	 	do	 Granular, gray	 	do		7.157 7.143 7.172 7.079 7.061 7.144 7.294 7.203 7.185 6.976 7.125 7.278 7.296 7.076 7.287 7.234 7.236 7.183 6.996 7.213 7.021 7.178 6.802 7.222 7.299 6.989 7.126 6.941 7.065 6.969
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