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Aman Rolling Mills bars or Thermo-Mechanically Treated bars are high-strength reinforcement bars having a tough outer core and a soft inner core. The first step of the manufacturing process involves formation of billet through Continuous Casting Machine (CCM). CCM is a process of casting metal into billet which can be further shaped into suitable products. At Aman Rolling Mills TMT we believe in being a class apart, we have a well-equipped integrated plant that produces billets, in – house and thereafter the process of making Aman Rolling Mills begins. The Aman Rolling Mills is passed through quinching and tempered process. While passing the Aman Rolling Mills through the quinching and tempered process, the water pressure is optimised. The sudden quenching and drastic change in temperature toughens the outer layer of the Aman Rolling Mills bar, thus making it super tough and durable.Once this process is over, the Aman Rolling Mills bars are subject to atmospheric cooling. This is done in order to equalise the temperature difference between the soft inner core and the tough exterior. Once the Aman Rolling Mills bar cools down, it slowly turns into a ferrite-pearlite mass. The inner core remains soft giving the Aman Rolling Mills bar great tensile strength, shock absorbing resistance and elongation point. This design is unique to the Aman Rolling Mills bars and gives superior ductility to the bars. Also, this unique manufacturing technology of V Rib and the absence of Cold stress makes this bar corrosion-resistant and also boosts its weldability.

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Aman Rolling Mills TMT Has Better Weight Tolerance

Size Specified (kg/meter) Specified (kg/meter) Per Wt.Variation (kg/meter) Individual sample variation
ISI Std. Aman Rolling Mills Std. ISI Std. Aman Rolling Mills Std. ISI Std. Aman Rolling Mills Std.
08mm 0.395 367 to 423 379 to 411 0.056 0.032 ±7 ±5
10mm 0.617 574 to 660 598 to 636 0.086 0.038 ±7 ±4
12mm 0.888 844 to 932 870 to 906 0.088 0.036 ±5 ±3
16mm 1.580 1501 to 1659 1548 to 1612 0.158 0.064 ±5 ±3
20mm 2.470 2396 to 2544 2445 to 2495 0.148 0.050 ±3 ±2
25mm 3.850 3735 to 3965 3811 to 3889 0.230 0.078 ±3 ±2
28mm 4.830 4685 to 4975 4782 to 4878 0.290 0.096 ±3 ±2
32mm 6.314 6125 to 6503 6207 to 6884 0.290 0.096 ±3 ±2

Chemical Composition Table -

Chemistry Unit IS 1786 Fe 415 Aman Rolling Mills Fe 415 Aman Rolling Mills Fe 500 Aman Rolling Mills Fe 550
Carbon % 0.30 Max 0.25 Max 0.20 Max 0.20 Max
Sulphur % 0.06 Max 0.05 Max 0.05 Max 0.05 Max
Phosphorus % 0.06 Max 0.05 Max 0.05 Max 0.05 Max
S & P % 0.11 Max 0.10 Max 0.10 Max 0.10 Max

Mechanical Properties Table -

Mechanical Properties Indian Standards (IS:1786) American Standards (ASTM A 615) European Standards (DIN 488) Aman Rolling Mills Standards
Grade Fe 415 60 (420) Bst-420 S
Proof stress in N/mm2 415 420 420 425
Tensile strength in N/mm2 485 500 500 490
Elongation in % 14.5 14 10 17
Bend Test up to 22 mm -3D 10 to 16 mm -4D 6 to 25 mm -4D 4D
Grade Fe 500 75 (520) Bst-500 S
Proof stress in N/mm2 500 520 500 525
Tensile strength in N/mm2 545 620 550 620
Elongation in % 12 9 10 15
Bend Test up to 22 mm -4D 10 to 25 mm -4D 6 to 25 mm -5D 4D
Grade Fe 550 90 (570) Bst-500-m
Proof stress in N/mm2 550 570 500 570
Tensile strength in N/mm2 585 570 550 690
Elongation in % 8 7 8 10
Bend Test up to 22 mm -5D 10 to 25 mm -5D 6D 5D