|
Two bend tests shall be made.
One specimen shall be tested with the outer surface
or the weld in tension, and the other with the inner
surface in tension. The specimens shall be rectangular
in section and shall be cut out transversely to the
weld so as to have a width of not less than one-and-a-half
times the thickness of the plate. The sharp corners
of the specimens shall be rounded to a radius not exceeding
ten per cent of the thickness of the specimen.
Where the plate thickness does not exceed 1 ¼
inches the thickness of the specimen shall be equal
to the full thickness of the test plate. Where the plate
thickness exceeds 1 ¼ inches the thickness of
the specimen shall be at least 1 ¼ inches. The
specimen to be tested with the outer surface of the
weld in tension shall be prepared by cutting to waste
the metal local to the inner surface of the weld, so
that the desired specimen thickness is obtained.
The specimen to be tested with the inner surface in
tension shall be prepared by cutting to waste the metal
local to the outer surface of the weld so that the desired
metal thickness is obtained. Where the thickness of
the plate permits, both specimens may be cut from the
same piece of plate, the specimens being located in
the plate one above the other. Each specimen shall be
mounted with the weld midway between the supports, set
apart at a distance of not more than 5.2 times the thickness
of the specimen and pushed through the support with
a former having a diameter equal to three times the
thickness of the specimen( see Fig
20).
One completion of the test no crack or defect at the
outer surface of the specimen shall be greater than
1/16 inch measured across the specimen or 1/8 inch measured
along the length of the specimen. Premature failure
at corner of the specimen shall not be considered cause
for rejection ( see Fig
20, Specimen A.)
|
