Osbert Chadwick Esq., C.M.G.
248
4/12/1906.
I
inherent weakness at this point. A further examination was made, and a description is given under clauses 19 & 20 of this report.
15.
At your request sample No. 1 was crushed in my testing machine in your presence on the 19th October, in order to see whether the metal was sufficiently ductile. The results are given on sheet "A" attached to the end of this report, and although I have not previously carried out such a test on a Wrought Iron Pipe, it appears to me that the amount of crushing the metal stood before showing signs of failure indicates that it is fairly ductile. You will note that the sides of the Pipe were crushed down to the extent of 2 inches in both the tests made before there was the slightest sign of cracking.
16.
The question as to whether tensile tests of the metal of the Pipes should be carried out was then considered, but it was decided that the results obtained could not fairly represent the quality of the metal, as the test pieces being of semicircular form would require to be flattened under pressure before they could be put in the jaws of the testing machine.
17.
In accordance with your instructions, analyses of the metal of Samples No. 1 and No. 3 have been made, the results being as follows:-
Sample No. 1 Pipe % 3 Pipe Amalgamated metal at line of infection Carbon 0.022 0.022 0/0 Silicon 0.117 0.171 0.108 0.152 Sulphur 0.014 0.012 Phosphorus 0.441 0.423 0.030 0.238 Manganese 0.115 0.180 Slag 0.551 1.076 1.60 Iron (by diff.) 98.740 98.114 0.117 1.988 97.883 97.69 100.000 100.000 100.000 100.0006
!
Osbert Chadwick Esq., C.V.G.
248
4/12/1906.
I
inherent weakness at this point. A further examination was made, and a description is given under clauses 19 & 20 of this report.
15,
At your request sample No. 1 was crushed in my testing machine in your presence on the 19th October, in order to see whether the metal was sufficiently ductile. The results are given on sheet "A" attached to the end of this report, and al- though I have not previously carried out such a test on a Wrought Iron Pipe, it appears to me that the amount of crushing the metal stood before showing signs of failure indicates that it is fairly ductile. You will note that the sides of the Pipe were crushed down to the extent of 2 inches in both the tests made before there was the slightest sign of erecking.
16.
The question as to whether tensile tests of the metal of the Pipes should be carried out was then considered, but it was decided that the results obtained could not fairly represent the quality of the metal, as the test pieces being of semicircular form would require to be flattened under pressure before they could be put in the jaws of the testing machine.
17.
In accordance with your instructions, analyses
of the metal of Samples No. 1 and No. 3 have been made, the results being as follows:-
-!
6"
Sample No. 1
Pipe
%
Carbon
0.022
0.022
Sample No. 3
5 Pipe
Amabyer's Standard
& metal at analysis Lune of
minfection
parapoff
JEL
FAC
0/0
0.022
0/0
0.0601
Silicon
0.117
0.171
0.108 0.152
Sulphur
0.014
0.012
Phosphorus
0.441
0.423
0-030
0.238
Manganese
0.115
0.180
Slag
0.551
Iron (by diff.)
98.740
1.076
98.114
0.117 1.60
0.0261
179
0.104 1.988
97·883 97. buy 91
100.000
100.000
100.000 100.000
6
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