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  • Gasha Steels Pvt Ltd, 34/1864 Kalliyath Building, Mamangalam, Cochin Kerala - 682 025

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Product Properties

Standards

SIZE (MM) NORMAL WEIGHT (KG/ METRE) TOLERANCE (KG/METRE) BUNDLE WEIGHT (KG) NUMBER OF PIECES (NO.) BHARATHI TOLERANCE (KG/METRE) BHARATHI BUNDLE WEIGHT (KG)
6 0.222 0.204-0.238 49.440-57.120 20 0.226 - 0.232 55.5 - 57.0
8 0.395 0.367-0.423 44.040-50.760 10 0.370 - 0.377 45.5 - 47.0
10 0.617 0.574-0.660 48.220-55.440 7 0.575 - 0.595 50.0 - 51.5
12 0.888 0.844-0.932 50.580-55.920 5 0.865 - 0.885 52.5 - 54.0
16 1.578 1.500-1.656 53.965-59.650 3 1.500 - 1.530 55.5 - 57.5
20 2.470 2.400-2.540 57.435-60.960 2 2.410 - 2.460 58.5 - 60.5
25 3.854 3.740-3.969 44.860-47.630 1 3.750 - 3.900 45.5 - 47.5
32 6.310 6.120-6.499 73.450-77.980 1 6.200 - 6.350 75.5 - 77.5

Mechanical properties

Bharathi TMT bars display improved mechanical properties like high yield strength, ductility, toughness, etc

MECHANICAL PROPERTIES UNIT IS:1786 FE550 (BIS) ) BHARATHI TMT FE550
Yield Strength N/mm2 (Min) 550 570
Tensile Strength N/mm2 (Min) 600 660
UTS / YS Ratio (Min) 1.06 1.14
Elongation % (Min) 14.5 17.5
Total Elongation % (Min) 5 5

Tensile / Yield strength

Comparison by soft / hard

Chemical properties

Bharathi TMT maintains the requisite levels of carbon as specified by BIS standards. Impurities such as sulphur and phosphorous that reduce the durability of steel are also maintained at recommended BIS levels.

ELEMENTS IS:1786 FE550 (BIS) BHARATHI TMT FE550
Carbon 0.25 (Max) 0.20- 0.24 (Max)
Phosphorous 0.045 (Max) 0.04 (Max)
Sulphur 0.045 (Max) 0.035 (Max)
Manganese NA 0.65 (Min)
CE 0.5 (Max) 0.42 (Max)

Carbon percentage composition (0.25% MAX)

Carbon is essential for the formation of cementite, pearlite, spheroidite, bainite and iron-carbon martensite, with martensite being the hardest of the microstructures. Carbon is also responsible for increase in tensile strength and hardness

HIGH CARBON

Increases Yield stress and Tensile stress

Decreases ductility (Elongation)

Increases brittleness by promoting carbide

LOW CARBON

Reduces Yield stress and Tensile stress

Increases ductility by reducing carbide or increasing ferrite and pearlite on core

Phosphorus percentage composition (0.050% MAX)

  • Phosphorus affects primarily steel bar ductility and toughness while (water) quenching.
  • Phosphorus has a tendency to react with iron or steel to form a compound of Iron Phosphide (Fe3P) which has a particularity of being brittle.
  • It renders steel less toughness and ductility while increasing its brittleness.

Sulphur percentage composition (0.045% MAX)

  • Sulphur reacts with iron and steel to form Iron Sulphide (Fe3S) which promotes “shortness”.
  • The grain boundaries may easily break up during hot forming.
  • High Sulphur is also a major factor in the drop in weldability (roll-ability), impact toughness and ductility of steel.
 
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