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Unformatted text preview: percentage of the original gauge length of a standard test piece.
of finished ‘ wire ’ whether
in ‘ coils ’ or
2.4 Parcel -Any
‘ bundles ’ presented for examination and test at any one time.
load, a non-proportional
original gauge length. stress which is just sufficient
elongation equal to a specified to produce,
of the 2.6 Ultimate
- The maximum load reached in a tensile
test divided by the original cross-sectional
area of the gauge length portion
of the test piece.
2.7 Wire -. Cold-drawn 3. MANUFACTURE steel wire of circular
AND CHEMICAL cross section. COMPOSITION 3.1 The wire shall be cold-drawn
from mild steel made by the open
hearth, electric duplex, acid bessemer, basic oxygen, or a combination
these processes. In case any other process is employed in the manufacture
of steel, prior approval of the purchaser should be obtained.
In case basic
oxygen process is employed for manufacture,
the nitrogen content of the
steel shall not exceed 0.008 percent.
3.1.1 The ladle analysis when made in accordance
with relevant parts
of IS : 228* shall show that the steel contains not more than O-050 percent
of sulphur and not more than 0,050 percent of phosphorus.
*Methods for chemical analysis of steels ( sucmd
reuisi~n ( being issued in parts ).
4 IS : 432 ( Part II) - 1982
4. FREEDOM FROM DEFECTS 4.1 All finished wire, subject to the provisions of 7 shall be cleanly drawn
to the specified size and shall be sound, free from splits, surface flaws
and other defects likely to impair its use for concrete reinforcement,
finished in a workmanlike
5. NOMINAL SIZES 5.1 Hard-drawn
Diameters wire shall be supplied
of hard-drawn in the following wire nominal sizes: 2.65, 3.0, 3.15, 3.55, 4.0, 4.5,
4.75, 5.0, 5.3, 5.6, 6.0 6.3, 7.1,
7.5, 8.0, 9.0, 9.5 and 10 mm NOTE- It is proposed to rationalize the diameters of hard-drawn wire and
include only 3,4, 5,6. 8 and 10 mm in the next revision of the standard. Sizes other
than these are now included to facilitate manufacturers and users to chance over to
the rarionalized sizes in this period. 6. TOLERANCES
6.1 The tolerance on the nominal diameter shall be + : percent. 6.1.1 For purposes of determining
whether the actual diameter
wire is within the specified tolerances,
shall be determined
with a micrometer
by taking two measurements
at right angles to each
other at three places along a length of not less than 250 mm and the
average of these six measurements
shall be taken as the diameter
6.2 Cutting Tolerances
be as follows: on Length - Over 3 m
Less than 3 m
7. PHYSICAL Cutting tolerance for wire shall f13mm
6mm REQUIREMENTS 7.1 The ultimate
tensile stress, proof stress and elongation
of the wire
when tested in accordance
with 8.2 shall not be less than the following
tensile stress, N/mm?
b) Proof stress (0.2 percent ), N/mm4
over a gauge length of
8 D, where D i...
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This document was uploaded on 10/01/2013.
- Fall '13