INNEE BASES--15-POUNDEB GUN MOUNTS.
05
Tabulation—Continued.
INNER BASES OF 15-POUNDER GUN MOUNTS, STEEL CASTINGS— Continued.
Diam- eter.	Sectional area.	Elastic limit per square inch.	Tensile strength per square inch.	Elongation in 2 inches.	Contraction of area.	Appearance of fracture.	Elongation of inch sections.
Inch.	Sq. in.	Pounds.	Pounds.	Per cent	Per cent.		Inch.
.505	.20	32,000	73,800	18.5	20.5	Granular 60 per cent, dull silky 40 per cent		.15, . 22*
.505	.20	37,000	79,800	18.0	20.5	Granular 60 per cent, silky 40 per cent		.20*, .16
.505	.20	29,000	69,500	14.5	20.5	Granular, silky spot at circumference		.14*, .15
.505	.20	32,000	71,400	15.0	16.9	Granular 80 per cent, dull silky 20 per cent		.14, .16*
.505	.20	35,000	77,000	15.0	16.9	Granular 80 per Cent, dull silky 20 per cent		.16*, .14
.505	.20	32,000	74,900	17.0	20.5	Granular 85 per cent., silky 15 per cent		.15, . 19*
.505	.20	34,000	76,550	17.5	16.9	Granular 80 per cent, dull silky 20 per cent		.17, .18*
. 505	.20	35,000	75,500	13.5	16.9	Granular 60 per cent, dull silky 40 per cent		. 12, . 15*
.505	.20	29,000	62,850	5.5	9.5	Granular 85 per cent, silky 15 per cent		.05, . 06*
. 505	.20	34,000	79,050	20.0	23.9	Granular 50 per cent, silky 50 per cent		.17, . 23*
.505	.20	28,000	73,400	18.0	20.5	Granular 75 per cent, silky 25 per cent		.19*, .17
.505	.20	30,000	72,950	20.5	23.9	Granular, silky spot at circumference		.21, . 20*
.505		33,000		20.5	23.9		.20, . 21*
							
.505	.20	40,000	90,600	19.0	20.5	Granular 20 per cent, dull silky 80 per cent		.22* .16
.505	.20	35,000	80,350	17.0	20.5	Granular, silky spot at circumference	-		.20*, .14
.505		39,000	94,400	19.0	23.9		.17, .21*
							
Marks
No.
on
specimen.
A 96 I В 15 A 97 1 В 15 A 98 I В 15 A 99 I В 15 A 100 I В 15 A 101 I В 15 A 102 I В 15 A 103 1 В 15 A 104 I В 15 A 105 I В 15 A 106 I В 15 A 107 I В 15 A 108 I В 15 A 109 I В 15 A 110 I В 15 A 111 I В 15
of
test.
7281	{
7282	I 7299 I
7308	I
7309	{
7310	{ 7Ш {
7312	I
7313	{
7314 731 5 7335 li
7342	ji
7343	I
7344	I
7345	I