TMT Bar Test
Is:1786-2008
1 SCOPE
1.1 This standard covers the requirements of deformed steel bars and wires for use as reinforcement in concrete, in the following strength grades: a) Fe415, Fe415D; b) Fe 500, Fe 500D; c) Fe 550, Fe 550D; and d) Fe 600. NOTES I The fimm+ ..=-. . . fnllowing . . . ~h~ cvmhnl -, .----- Fe !n~imte thP gyrifid minimum 0.2 percent proof stress or yield stress in N)mm:. 2 ‘he letter D following the strength grade indicates the category wth same specified minimum 0.2 percent proof stress/yield stress but with enhanced specified minimum percentage elongation. 1.2 ibis standard ailows the chemical composition and carbon equivalent to be limited so that the material can be readily welded by conventional welding procedures. Material not conforming to these Iimits is generally difficuh to weld for which special care and precautions will have to be exercised. 1.3 This standard applies to hot-rolled steel without subsequent treatment, or to hot-rolled steel with controlled cooling and tempering and to cold-worked steel. The production process is at the discretion of the manufacturer. 1.4 This standard also applies to reinforcing bars and wires supplied in coil form but the requirements of this Indian Standard apply to the straightened product. 1.5 Tiik standard AU applies to reinforcing bars arid wwes which maybe subsequently coated
SCOPE
1.1 This standard covers the requirements of deformed
steel bars and wires for use as reinforcement in concrete,
in the following strength grades:
a) Fe415, Fe415D;
b) Fe 500, Fe 500D;
c) Fe 550, Fe 550D; and
d) Fe 600.
NOTES
I The fimm+
fnllowing . . . ~h~ cvmhnl -, .----- Fe !n~imte thP gyrifid
minimum 0.2 percent proof stress or yield stress in
N)mm:.
2 ‘he letter D following the strength grade indicates the category
wth same specified minimum 0.2 percent proof stress/yield stress
but with enhanced specified minimum percentage elongation.
1.2 ibis standard ailows the chemical composition and
carbon equivalent to be limited so that the material can
be readily welded by conventional welding procedures.
Material not conforming to these Iimits is generally
difficuh to weld for which special care and precautions
will have to be exercised.
1.3 This standard applies to hot-rolled steel without
subsequent treatment, or to hot-rolled steel with
controlled cooling and tempering and to cold-worked
steel. The production process is at the discretion of the
manufacturer.
1.4 This standard also applies to reinforcing bars and
wires supplied in coil form but the requirements of this
Indian Standard apply to the straightened product.
1.5 Tiik standard AU applies to reinforcing bars arid
wwes which maybe subsequently coated
2 REFERENCES
The standards listed below contain provisions, which through reference in this text constitute provisions of this standard. At the time of publication, the editions mdlcated were vaiid. Ali standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below:
3 TERMINOLOGY
3.1 Batch — Any quantity of barshvires of same size
and grade whether in coils or bundles presented for
examination and test at one time.
3.2 Bundle—Two or more coils or a number of
lengths properly bound together.
3.3 Elongation —lleincrease inlengthofa tensile
test piece under stress. The elongation at fracture is
conventionally expressed as a percentage of the original
gauge length of a standard test piece.
4 MANUl AND ACHJREANDCHEMICALCOMPOSJHON
4.1 Steel shall be manufactured by the open-hearth,
electric, duplex, basic-oxygen process or a combination
of these processes. In case any other process is employed
by the manufacturer, prior approval of the purchaser
should be obtained.
4.1.1 Steel shall be supplied, semi-killed or killed. 4.1,2 The bars/wires shall be manufactured from
properly identified heats of mould cast, continuously
cast steei or roiieci semis.