ENGLAND STANDARD (BS 4449: 97) Ribbed STEEL BARS |
Rated
Diameter |
Nominal Cross Section Area |
Weight |
EN to the ribs (mm) |
Longitudinal Ribs (mm) |
Pitch / STEP
mm |
Ribs TIP Distance
mm. |
Kg / m |
Tolerance
% |
Height |
Width |
Height |
Width |
mm. |
mm2 |
|
|
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
6 |
28.3 |
0.222 |
± 9 |
0.3 |
0.6 |
0.48 |
0.72 |
0.3 |
0.84 |
0.48 |
1.2 |
3,.0 |
4.8 |
1.5 |
2.3 |
8 |
50.3 |
0.395 |
± 6.5 |
0.4 |
0.8 |
0.64 |
0.96 |
0.4 |
0.84 |
0.64 |
1.6 |
4.0 |
6.4 |
2.0 |
3.1 |
10 |
78.5 |
0.616 |
0.5 |
1.0 |
0.8 |
1.2 |
0.5 |
0.84 |
0.8 |
2.0 |
5.0 |
8.0 |
2.5 |
3.9 |
12 |
113.1 |
0.888 |
± 4.5 |
0.6 |
1.2 |
0.96 |
1.44 |
0.6 |
0.84 |
0.96 |
2.4 |
6.0 |
9.6 |
3.0 |
4.7 |
16 |
201.1 |
1.579 |
0.8 |
1.6 |
1.28 |
1.92 |
0.8 |
0.84 |
1.28 |
3.2 |
8.0 |
12.8 |
4.0 |
6.2 |
20 |
314.2 |
2.466 |
1.0 |
2.0 |
1.6 |
2.4 |
1.0 |
0.84 |
1.6 |
4.0 |
10.0 |
16.0 |
5.0 |
7.8 |
25 |
490.9 |
3.854 |
1.25 |
2.5 |
2.0 |
3.0 |
1.25 |
0.84 |
2.0 |
5.0 |
12.5 |
20.0 |
6.2 |
9.8 |
32 |
804.2 |
6.313 |
1.60 |
3.2 |
2.56 |
3.84 |
1.60 |
0.84 |
2.56 |
6.4 |
16.0 |
25.6 |
8.0 |
12.5 |
40 |
1256.6 |
9.864 |
2.0 |
4.0 |
3.2 |
4.8 |
2.0 |
0.84 |
3.2 |
8.0 |
20.0 |
32.0 |
10.0 |
15.7 |
50 |
1963.5 |
15,413 |
2.5 |
5.0 |
4.0 |
6.0 |
2.5 |
0.84 |
4.0 |
10.0 |
25.0 |
40.0 |
12.5 |
19.6 |
MECHANICAL PROPERTIES TEST |
Quality |
Akma N / mm2 |
Akma / Pull Rate N/mm2 |
Elongation Elasticity |
Total max. % AGT |
|
min. |
min. |
min. |
min. |
GR 250 |
250 |
Akma x 1.15 |
22 |
- |
GR 460 A |
460 |
Akma x 1.05 |
12 |
2.5 |
GR 460 B |
460 |
Akma x 1.08 |
14 |
5 |
CHEMICAL COMPOSITION |
Element |
GR 250 % max. |
GR 460 A / B % max. |
Ribs and Marking Method |
Casting |
Product |
Casting |
Product |
GR 250 |
|
GR 460 A ( 8.18 ) |
|
GR 460 B ( 8.18 ) |
|
|
C |
0.25 |
0.27 |
0.25 |
0.27 |
P |
0.060 |
0.065 |
0.050 |
0.055 |
S |
0.060 |
0.065 |
0.050 |
0.055 |
N |
0.012 |
0.013 |
0.012 |
0.013 |
CE |
0.42 |
0.45 |
0.51 |
0.54 |
| |
|
|
|
|
Mn Cr+Mo+V Ni+Cu |
CE = C + ------------- + ------------------- + -----------------
|
6 5 15 |
|
|
