| (a) Process.-
To comply with Regulation
33 (a).
(b) Chemical Composition.- To comply with Regulation
33 (b).
(c) Freedom from Defects.- To comply with Regulation
33 (c).
(d) Rolling Margin.- The bars in any part shall not
be more than 1% over or more than ½% under the specified
diameter.
(e) Tensile Tests.- The materials shall have the tensile
properties shown in the following table:-
Tensile properties
|
Unturned rods
(rods upto 1¼ inches dia.)
|
Turned rods (rod
above 1¼ inches dia.) |
| Minimum tensile strength lb. per sq.
inch. |
32,400 |
32,400 |
Elongation, minimum per cent
in 2 inches gauge length.
|
40
|
45 |
f) Bend Tests.- To comply with Regulation
33(f).
(g) Dump Tests.- a piece of rod 1 inch long shall
be placed on end and hammered or crushed down cold to a thickness
of 3/8 inch without showing either crack or flaw on the circumference
of the resulting disc.
(h) Number of Tests.- One bar, from which the required
test specimens shall be taken, shall be selected at random
from each batch of 50 (or part thereof) bars of each size
from each melt. From each bar selected, one tensile test,
one cold bend test, one hot bend test and one dump test shall
be made.
|
