25-02-2013, 10:26 AM
SPECIFICATION FOR MILD STEEL AND MEDIUM TENSILE STEEL BARS AND HARD-DRAWN STEEL WIRE FOR CONCRETE REINFORCEMENT
SPECIFICATION FOR MILD STEEL.pdf (Size: 649.12 KB / Downloads: 226)
SCOPE
This standard ( Part I ) covers the requirements of mild steel and
medium tensile steel plain bars in round and square sections for use as reinforcement in concrete.
TYPES AND GRADES
Reinforcement supplied in accordance with this standard shall be
classified into the following types:
a) Mild stee! bars, and
b) Medium tcnrile steel bars.
Mild steel bars shall be supplied in the following two grades:
a) Mild steel bars, Grade I; and
b) Milcl steel bars, Grade II.
MANUFACTURE AND CHEMICAL COMPOSITION
Steel for mild steel reinforcement bars, Grade I shall be manufactured
and have the chemical compositicn in accordance with the requirements
of Steel Designation Fe 410-S of JS : 226-1975*.
FREEDOM FROM DEFECTS
All finished bars shall be well and cleanly rolled to the dimensicns
and weights specified. They shall be free from cracks, surface fla\s,
laminations and rough, jagged and imperfect edges and all other harmful
defects,
IDENTIFICATION AND MARKING
The manufacturer or supplier shall have ingots, billets and bars or
bundles of bars marked in such a way that all finished bars can be traced
to the cast from which they were made. Every facility shall be given to
the purchaser or his authorized representative for tracing the bars to the
cast from which they were made.
The medium tensile steel bars shall be suitably marked to identify
them from mild steel bars. Mild steel b ars Grade I and II shall have
distinctive identification tags.
Each bundle or coil containing the bars may also be suitably
marked with the Standard Mark, in which case the concerned test artificate
shall also bear the Standard Mark.