◊ Deformed Bars
Deformed bars are with transverse and longitudinal rib to increase the tensile strength of the concrete, suitable for high strength construction such as dams, bridges, and high rise buildings etc. They are made to the TIS 24-2559 SD 40 and SD 50 from 12-32 mm. dia at 10 and 12 metre long.
Deformed Bars |
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| Name | Diameter (mm.) |
Weight (kg/m) |
Cross Section Area (Sq mm.) |
| DB 12 (SD40 and SD50) | 12 | 0.888 | 113.10 |
| DB 16 (SD40 and SD50) | 16 | 1.578 | 201.06 |
| DB 20 (SD40 and SD50) | 20 | 2.466 | 314.16 |
| DB 25 (SD40 and SD50) | 25 | 3.853 | 490.87 |
| DB 28 (SD40 and SD50) | 28 | 4.834 | 615.75 |
| DB 32 (SD40 and SD50) | 32 | 6.313 | 804.25 |
Chemical Composition (%)
| Chemical | Chemical Composition (less than %, by weight) |
| Aluminium | 0.3 |
| Molybdenum | 0.08 |
| Boron | 0.0008 |
| Nickel | 0.3 |
| Chromium | 0.3 |
| Niobium | 0.06 |
| Cobalt | 0.3 |
| Silicon | 0.6 |
| Copper | 0.4 |
| Titanium | 0.05 |
| Lead | 0.4 |
| Tungsten | 0.3 |
| Vanadium | 0.1 |
| Zirconium | 0.05 |
| Class | Chemical Composition (max %, by weight) | ||||
|---|---|---|---|---|---|
| Carbon | Manganese | Phosphorus | Sulfur | Carbon +(Managanese/6) |
|
| SD 40 | - | 1.80 | 0.050 | 0.050 | 0.55 |
| SD 50 | - | 1.80 | 0.050 | 0.050 | 0.60 |
Mechanical Properties
| Class | Min Yield Strength Mpa (kg/mm2) |
Min Tensile Strength Mpa (kg/mm2) |
Minimum Elongation (%) |
Cold Bending | |
| Degree | Inside Diameter of Bend | ||||
| SD 40 | 390 (40) | 560 (57) | 15 | 180 | 5 times bar diameter (All Size) |
| SD 50 | 490 (50) | 620 (63) | 13 | 90 | 5 times bar diameter (Max 25 mm.) |
| 6 times bar diameter (Over 25 mm.) |
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Standard Packing
| Size | kg/m. | Length (m.) |
Weight/Pcs (kg) |
Amount/Bundle (Psc) |
Weight/Bundle (kg) |
| DB 12 | 0.888 | 10 | 8.88 | 200 | 1776 |
| DB 12 | 0.888 | 12 | 10.656 | 200 | 2131 |
| DB 16 | 1.578 | 10 | 15.78 | 120 | 1894 |
| DB 16 | 1.578 | 12 | 18.936 | 120 | 2272 |
| DB 20 | 2.466 | 10 | 24.66 | 80 | 1973 |
| DB 20 | 2.466 | 12 | 29.592 | 80 | 2367 |
| DB 25 | 3.853 | 10 | 38.53 | 50 | 1927 |
| DB 25 | 3.853 | 12 | 46.236 | 50 | 2312 |
| DB 28 | 4.834 | 10 | 48.34 | 40 | 1934 |
| DB 28 | 4.834 | 12 | 58.008 | 40 | 2320 |
| DB 32 | 6.313 | 10 | 63.13 | 30 | 1894 |
| DB 32 | 6.313 | 12 | 75.756 | 30 | 2273 |