Rama TMT is an example of ‘Innovation meets products excellence’. Striking a fine balance between the life of the structure and its cost, these corrosion resistant bars help in reducing the rate of corrosion from the time of construction and thus enhance the life span of the structure.
Rama TMT bars, ranging in size from 8mm to 40mm, are available in grades including Fe 500, Fe 500D, Fe 550, and Fe 550D, all with a standard length of 12m.
ISI STANDARD | RAMA TMX BARS | ||||
---|---|---|---|---|---|
Size | Specified weight gm/m | Tolerance Allowed | Tolerance Limit gm/m | Weight Tolerance gm/m | Indv, Sample % Variation |
8mm | 395 | ±7% | 367-423 | 379-411 | ±4 |
10mm | 617 | ±7% | 574-660 | 598-636 | ±3 |
12mm | 888 | ±5% | 844-932 | 861-915 | ±3 |
16mm | 1580 | ±5% | 1501-1659 | 1531-1625 | ±3 |
20mm | 2470 | ±3% | 2396-2544 | 2421-2519 | ±2 |
25mm | 3850 | ±3% | 3735-3965 | 3773-3927 | ±2 |
28mm | 4830 | ±3% | 4685-4975 | 4733-4927 | ±2 |
32mm | 6310 | ±3% | 6120-6499 | 6184-6436 | +2 |
Content | ISI FE 500D | RAMA FE 500D | ISI FE 550D | RAMA FE 550D | |
---|---|---|---|---|---|
Chemical Properties | |||||
Carbon (Max) | 0.25 | 0.2 | 0.25 | 0.2 | |
Sulphur (Max) | 0.040 | 0.03 | 0.040 | 0.03 | |
Phosphorus (Max) | 0.040 | 0.035 | 0.040 | 0.035 | |
Sulphur & Phosphorus | 0.075 | 0.07 | 0.075 | 0.07 | |
Carbon Equivalent | 0.50 | 0.50 | 0.61 | 0.61 | |
CRE Value (Cu+Cr+P)% (Min) | 0.40 | 0.40 | 0.40 | 0.40 | |
Physical Properties | |||||
Yield Stress (N/mm2) (min) | 500 | 530 | 550 | 565 | |
Elongation % (Min) | 16.00 | 18.00 | 14.50 | 16.00 | |
UTS/YS Ratio | 1.10 | 1.15 | 1.08 | 1.15 | |
Tensile Strength (N/mm2) | 565 | 620 | 600 | 650 | |
Bend Test | |||||
No traverse crack should form after bending through 180° and a mandrel of diameter specified below. | |||||
Bars up to and including 20mm | <3d | <3d | <4d | <4d | |
Bars over 20 mm | <4d | <4d | <5d | <5d | |
Re-bend Test | |||||
No traverse crack should form after bending through 135° and reverse bending after 100°C boiling for 30 min the same through 157.5° around the mandrel diameter specified below. | |||||
Bars up to and including 10mm | <4d | <4d | <6d | <6d | |
Bars over 10mm | <6d | <6d | <7d | <7d |