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PRODUCT PROPERTIES

properties
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 0.210-0.225 50.400-54.000
8 0.395 0.367-0.423 44.040-50.760 10 0.370-0.395 44.500-47.000
10 0.617 0.574-0.660 48.220-55.440 7 0.580-0.610 48.700-52.000
12 0.888 0.844-0.932 50.580-55.920 5 0.850-0.880 51.000-53.000
16 1.578 1.500-1.656 53.965-59.650 3 1.520-1.580 54.700-57.000
20 2.470 2.400-2.540 57.435-60.960 2 2.420-2.500 58.000-60.000
25 3.854 3.740-3.969 44.860-47.630 1 3.760-3.900 45.200-46.800
32 6.310 6.120-6.499 73.450-77.980 1 6.200-6.400 74.400-76.800

MECHANICAL PROPERTIES

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

MECHANICAL PROPERTIES UNIT IS:1786 Fe500 (BIS) BHARATHI TMT Fe500
YIELD STRESS N/mm² 500 (Min) 520 (Min)
TENSILE STRESS N/mm² 585 (Min) 600 (Min)
ELONGATION % (Min) 12% (Min) 17.5% (Min)

TENSILE/YIELD STRENGTH
COMPARISON BY SOFT/HARD

Graph
Graph

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 Fe500 (BIS) BHARATHI TMT Fe500
CARBON 0.30 (Max) 0.25 (Max)
MANGANESE Not mentioned 0.55-0.80
SULPHUR 0.055 (Max) 0.045 (Max)
PHOSPHORUS 0.055 (Max) 0.050 (Max)
SULPHUR+PHOSPHORUS 0.105 (Max) 0.095 (Max)
CARBON EQUIVALENT 0.42 (Max) 0.42 (Max)
MICRO ALLOYS OPTIONAL 0.30 (Max) 0.30 (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:

a) Increases Yield stress and Tensile stress
b) Decreases ductility (Elongation)
c) Increases brittleness by promoting carbide

LOW CARBON:

a) Reduces Yield stress and Tensile stress
b) 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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