British Standard Deformed Steel Bar
BS 4449:97 Deformed Steel Bar Specifications
British Standard Deformed Steel Bar BS 4449:97 Specifications
| BS 4449 : 97 Deformed Steel Bar Specifications | |||||||||||||||
| 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 | ||||
| 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 Properties | ||||||||||
| Element | GR 250 % max. | GR 460 A / B % max. | Ribs and Marking Method | |||||||
| Casting | Product | Casting | Product |
|
||||||
| 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 | ||||||||||
Enquiry
Deformed Steel Bar Standards
ASTM A 615
TS 708-VCH
BS 4449 : 97
ELOT 971 : 90
DIN 488 : 86
NF A 35 – 016 : 96
PS 90 : 98
