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Quality control process,
starts from the selection of the suppliers and
it is controlled from the arrival of the raw
material (billets), all the way to the sales.
Billets are initially classified according to
their chemical composition and stored in
predetermined locations. These actions are done
to control the quality of the final mechanical
specification of the product.
The final product testing is done in a modern
testing lab, equipped with a computerized
testing device, to measure the mechanical
properties of the final product.
|
Steel grade |
Mechanical properties |
| Ultimate rupture strength |
Yield strength |
Elongation |
Cold bend test by |
| N / mm'2 |
N / mm'2 |
% |
180 Deg |
| min |
min |
min |
| 3ps |
370 |
245 |
26 |
good |
| 5ps |
490 |
285 |
20 |
good |
|
Steel grade |
Fraction of total mass of the elements,
% |
| C |
Mn |
Si |
S max |
P max |
Cr max |
Ni max |
Cu max |
| 3ps |
0.14 ~ .22 |
0.4 ~ 0.65 |
0.05 ~ 0.15 |
0.05 |
0.04 |
0.3 |
0.3 |
0.3 |
| 5ps |
0.28 ~ 0.37 |
0.5 ~ 0.8 |
0.05 ~ 0.15 |
0.05 |
0.04 |
0.3 |
0.3 |
0.3 |
Reinforcement Steel Bars Specification:
1-Deformed-Reinforcement
Bars:
The production of steel bars for construction
(reinforcing bars) including, all standard
diameters and standard lengths of 12 m and
special orders can be produced with different
lengths from 4 meters up to 12 meters.
The deformed bars are available in accordance
with (ASTM A 615) (grade 40) & (grade 60)
standard and may also can be produced to other
international standards, upon request.
Mechanical and Chemical Properties:
ا A-III , GOST 5781-57
ASTM A615 M
|
STANDARD |
SYSTEM SARKIS TUFENKJI Co. Partners |
|
SIZE Q |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
25 |
32 |
|
|
WEIGHT (W) |
min |
0.370 |
0.575 |
0.835 |
1.13 |
1.45 |
1.88 |
2.32 |
3.62 |
5.93 |
Kg/m |
| max |
0.395 |
0.615 |
0.885 |
1.20 |
1.60 |
2.00 |
2.50 |
3.80 |
6.30 |
OBLIQUE
RIBS |
HEIGHT
(As) |
min |
0.45 |
0.55 |
0.6 |
0.7 |
0.75 |
0.85 |
1 |
1.25 |
1.6 |
mm |
| max |
0.75 |
1 |
1.2 |
1.3 |
1.45 |
1.65 |
2 |
2.5 |
3.2 |
| WIDTH
(Bs) |
min |
0.65 |
0.8 |
0.95 |
1.15 |
1.3 |
1.5 |
1.6 |
2 |
2.5 |
mm |
| max |
0.95 |
1.3 |
1.6 |
1.8 |
1.95 |
2.15 |
2.3 |
3 |
308 |
LONGITUDINAL
RIBS |
Height
(A1) |
min |
0.35 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1 |
1.3 |
1.7 |
mm |
| max |
1 |
1.4 |
1.6 |
1.9 |
2.2 |
2.5 |
2.8 |
3.2 |
4 |
| Width
(B1) |
min |
0.7 |
0.9 |
1.1 |
1.3 |
1.5 |
1.6 |
1.7 |
2 |
2.8 |
mm |
| max |
1.5 |
1.9 |
2.3 |
2.7 |
3 |
3.3 |
3.7 |
4.4 |
5.5 |
|
SPACING (Cs) |
min |
4.4 |
5.5 |
6.6 |
7.7 |
8.8 |
9.9 |
11 |
14 |
18 |
mm |
| max |
5.6 |
7 |
8.3 |
10 |
11.2 |
12.5 |
14 |
17.5 |
22 |
| DEGREE
(q) |
45
~ 60 |
Deg |
|
QUALITY |
|
GR 40 |
GR 60 |
| MECHANICAL PROPERTIES |
YIELD STRENGTH (N\mm'2) |
min 350 |
min 540 |
| TENSILE STRENGTH (Nmm'2) |
min 500 |
min 680 |
| % ELONGATION L0 = 10d |
min 16 |
min 11 |
| CHEMICAL COMPOSITION |
C % |
0.2 ~ 0.26 |
0.28 ~ 0.36 |
| Si % |
0.25 max |
0.35 max |
| Mn % |
0.6 ~ 0.9 |
0.9 ~ 1.1 |
| S % |
0.060 max |
0.060 max |
| P % |
0.060 max |
0.060 max |
| C ev % |
0.45 ~ 0.5 |
0.5 ~ 0.55 |
A- Production of steel GR 40
Cross Sectio
mm2 |
L0
mm |
L1
mm |
Yield Force
kgf |
Re %0.2
kgf/mm2 |
Tensile Forc
kfg |
Rm
kfg/mm2 |
Rm/Re |
Elongation % |
E Modulus
kfg/mm2 |
| 78.5 |
100 |
146.2 |
3162. |
40.28 |
4662 |
59.39 |
1.47 |
46.2 |
20449 |
|
B- Production of steel
GR 60
Producing by Termix
E Modulus
kfg/mm2 |
Elongation %
|
Rm/Re |
Rm
kfg/mm2 |
Tensile Forc
kfg |
Re %0.2
kgf/mm2 |
Yield Force
kgf |
L1
mm |
L0
mm |
Cross Sectio
mm2 |
| 18273 |
15.6 |
1.49 |
75.79 |
8567 |
50.88 |
5751 |
138.7 |
120 |
113.04 |
2-Equal
Bars:
|
A |
T |
A |
T |
A |
T |
A |
T |
A |
T |
A |
T |
A |
T |
| 30 |
12 |
20 |
10 |
16 |
8 |
16 |
7 |
12 |
5 |
24 |
4.5 |
50 |
4 |
| 40 |
12 |
25 |
10 |
20 |
8 |
|
|
14 |
5 |
29 |
4.5 |
|
|
|
|
30 |
10 |
25 |
8 |
|
|
16 |
5 |
34 |
4.5 |
|
|
|
|
40 |
10 |
30 |
8 |
|
|
20 |
5 |
47 |
4.5 |
|
|
|
|
50 |
10 |
40 |
8 |
|
|
25 |
5 |
48 |
4.5 |
|
|
|
|
|
|
50 |
8 |
|
|
30 |
5 |
50 |
4.5 |
|
|
|
|
|
|
|
|
|
|
40 |
5 |
|
|
|
|
|
|
|
|
|
|
|
|
50 |
5 |
|
|
|
|
3-Square Bars:
|
A X A |
20 X 20 |
16 X 16 |
14 X 14 |
12 X 12 |
10 X 10 |
8 X 8 |
|
A X A |
14.9 X 14.9 |
10.7 X 10.7 |
9.7 X 9.7 |
4-Equal Angles:
|
A X T |
35 X 35 X 3.5 |
30 X 30 X 3.5 |
30 X 30 X 3 |
25 X 25 X 2.5 |
|
STANDARD - DIN
17100 |
GRADE - ST 37 - 2 |
|
MECHANICAL
PROPERTIES |
TENSILE STRENGHT (N/mm2) |
350 / 470 |
| YIELD STRENGTH (N/mm2) |
230 |
| ELONGATION (%) |
24 |
|
CHEMICAL
COMPOSITION |
C (%) |
0.07 ~ 0.17 |
| Si (%) |
0.03 ~ 0.30 |
| Mn (%) |
0.20 ~ 0.60 |
| S (%) |
max 0.05 |
| P (%) |
max 0.05 |
|
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