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STANDARD
SIZE |
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|
Grade |
Sizes(in mm) |
|
Saakha
Torsteel TOR
40 (Fe 415) |
8,10,12,16,20,22,25,28,32 |
|
Saakha
Torsteel Tor50(Fe
500) |
8,10,12,16,20,22,25,28,32 |
|
MECHANICAL PROPERTIES |
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|
S.No |
Charactersties |
NS
191-2046 Fe415 |
NS191-2046
Fe500 |
Saakha Torsteel TOR 40 (Fe 415) |
Saakha
Torsteel TOR 50 (Fe 500) |
|
1. |
0.2%
proof stress/yield stress, Min,
N/mm |
415 |
500 |
430-500 |
520-620 |
|
2. |
Elongation
% min, on gauge Length
5.65 ?A |
14.5 |
12.0 |
15-30 |
13-25 |
|
3. |
Tensile
strength Min,
N/mm |
485 |
545 |
500-600 |
580-680 |
|
4. |
Bend
Test Up
to and including 22 over 22 |
No
trams verse crack in bend portion bending to 180. 3d
4d |
No
transverse crack in bend portion bending to 4d 5d |
Satisfies
bend around a mandrel (Thro� 180;) of 2d
for dia upto and including 25
mm and 3d for over 25mm dia. |
|
|
5. |
Rebend
test Up
to and including10mm over 10mm |
No
facture in bend portion of rebending to 157.5: 5d 7d |
No
facture in vend portion of rebending to 157.5: 7d 8d |
Satisfies rebend test around a mandrel of 5d
for dia up to and including 10mm and 7d for over 10mm dia., through 45: bend
and 22.5; reverse bend |
|
|
RECOMMENDED
LAP & |
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|
M
150 |
M 200 |
M
300 |
M 400 |
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|
Tension
Compression |
70d 40d |
60d 35d |
50d 30d |
40d 30d |
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STANDARD SIZED AND
USEFUL DATA |
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|
Diametre mm |
Cross
Section
Area Mm2 |
Nominal
weight Kg/metre |
Range
of weight Kg/metre |
Norminal
length (approx) Metres
/MI |
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|
8 10 12 16 20 22 25 28 32 36 40 |
50.5 78.6 113.1 201.2 314.3 380.3 491.1 616.0 804.6 1018.3 1257.2 |
0.395 0.617 0.888 1.579 2.467 2.885 3.885 4.836 6.316 7.994 9.869 |
0.367-0.423 0.574-0.660 0.843-0.932 1.500-1.658 2.393-2.541 2.896-3.074 3.739-3.971 4.691-4.981 6.127-6.506 7.754-8.234 9.572-10.165 |
2500 1600 1100 630 400 330 260 200 155 120 100 |
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SUBSTITUTION CHART |
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Compression And Tension |
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|
Saakha Torsteel Tor 40 (Fe-415) dia.(mm) |
Mild Steel dia. (mm) |
Saakha Torsteel Tor 50(Fe-500) dia.(mm) |
|
8 10* 10+8 2/10 16 2/12 20 22 25 28 25/20 |
10 12 16 18 20 22 25 28 32 36 40 |
8* 2/6 12* 10+8 12+8 16 18 20 2/16 2/18 2/20 |
|
Replacement
as above requires no change in anchorage/ lap length or concrete strength. *Reduce the
number of bars by 10 percent Max. Bundled bars eg: (2/12) or
(10+8) are considered as single bars. |
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CHEMICAL
COMPOSITION |
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CONSTITUENT |
LANDLE ANALYSIS(in % max) C P S S & P Mn |
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NS
191-2046 Fe
415 |
0.300 |
0.060 |
0.060 |
0.110 |
- |
|
Saakha
Torsteel TOR40
(Fe 415) |
0.230 |
0.050 |
0.050 |
0.090 |
0.900 |
|
NS
191-2046 Fe500 |
0.300 |
0.055 |
0.055 |
0.105 |
- |
|
Saakha
Torsteel ToR
50 (Fe 500) |
0.300 |
0.055 |
0.055 |
0.090 |
1.200 |
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Bendability |
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|
It
has superior values of bendability. It can be bend & rebend around very small mandrels of 3d,
5d & 7d respectively without failure. |
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|
Operation |
Size |
Saakha
Torsteel TOR 40 |
Saakha
Torsteel TOR 50 |
|
|
Upto
& Including 8mm. |
3d |
4d |
|
Rebend |
Upto
& Including 10mm.
Over
10 mm |
5d 7d |
5d 7d |
|
FUNCTIONAL
EFFICIENCY OF REINFORCEMENT COMPARISON OF MILD STEEL, SAAKHA TORSTEEL TOR- 40
& TOR -50 |
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|
|
Mild
Steel |
Saakha
Torsteel Tor
- 40 |
Saakha
Torsteel Tor - 50 |
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|
Basic Funtions |
%
of Total |
Strength Or
stress N/mm2 |
Qty. M/T |
Strength
or stress N/mm2 |
Qty. M/T |
Efficiency Over
mild steel |
Strength or
stress N/mm2 |
Qty. M/T |
Efficiency Over
mild steel |
|
Tension
Compression Shear Distribution |
(50) (30) (10) (10) |
250 240 140 0.15% |
1.0 1.0 1.0 1.0 |
425 370 230 0.12% |
0.59 0.70 0.60 0.80 |
170% 154% 170% 125% |
510 420 230 0.12% |
0.5 0.6 0.6 0.8 |
200% 175% 170% 125% |
|
|
Net
Functional Efficiency 100% |
160% |
180% |
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