Bashundhara Steel (BS) Deformed Bars for the reinforcement of Concrete
Bashundhara Steel (BS) CONTD.








Bashundhara Steel (BS) Deformed Bars for the reinforcement of Concrete


A. Chemical Composition :

Chemical Composition of Steel Grades: Cast Analysis
Element
Grade BS 60
% (max.)
Grade BS 40
% (max.)
Carbon
0.3
0.2
Sulfur
0.04
0.04
Phosphorus
0.05
0.05
Silicon
0.3
0.2


Maximum Carbon Equivalent Values: Cast Analysis
Grade
Maximum Carbon Equivalent Value
%
BS 60
0.52
BS 40
0.41


Maximum Deviations in Chemical Composition on Product Analysis
Element
Deviation above the specified maximum.
%
Carbon
0.05
Sulfur
0.01
Phosphorus
0.01
Silicon
0.05
Carbon Equivalent Value
0.02

B. Cross Sectional Area and Masses :

Cross Sectional Area and Masses of Deformed Bars.
Nominal Size
mm
Cross - Sectional Area
mm2
Mass per Running Metre
Kg.)
8
50.3
0.395
10
78.5
0.616
12
113.0
0.888
16
201.0
1.579
20
314.0
2.466
22
380.0
2.98
25
491.0
3.854
28
804.0
6.313
32
1256.0
9.864

Bashundhara Steel (BS) CONTD.

Tensile Properties
Grade
Nominal
Size
8 and 10
+/- 6.5
12 and over
+/- 4.5

C. Mechanical Properties :

Tensile Properties
Grade
Nominal
Size
Yield Strength, min
PSI
Tensile Strength, min
PSI
Elongation
%
BS - 60
All Sizes
60000
90000
09 – 20
BS - 40
All Sizes
40000
70000
15 – 25

Bend Test Formers
Grade
Nominal Size
Mandrel dia
BS - 60
Upto and including 16mm
20mm to 25mm
28mm & above
3d
4d
5d
BS - 40
All Sizes
2d
Where d= Nominal dia of the bar & Bend angle = 180o

Re-Bend Test Formers
Grade
Nominal Size
Mandrel dia
BS - 60
Upto and including 25mm
28mm and above
5d
7d
BS - 40
All Sizes
3d
Where d= Nominal dia of the bar & Bend angle = 180o

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