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The number of tests required for each batch of castings
shall be in accordance with the following table, the various
classes of castings being divided into four representative
groups. One test shall refer to one transverse and one tensile
test, whether taken from one or two test bars as cast.
Group
|
Weight of castings
|
Test requirements
|
| 1 |
Upto 28 lbs.
|
One test for each
30 cwt. of castings or part thereof. |
| 2 |
Over 28 lbs. and upto 1 cwt.
|
One test for each 2 tons of
castings or part thereof. |
| 3 |
Over 1 cwt. and upto one ton
|
One test for each 4 tons of
castings or part thereof. |
| 4 |
Over 1 ton and important
castings where mutually agreed upon.
|
One test for each
4 tons of castings or part thereof or for each casting
weighing 4 tons or more. |
In the above Groups 1, 2 and 3, all castings represented by
one test must be poured from the same ladle or same heat as
the bar or bars provided for the test.
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