TMT Steel bars grade – Fe415, Fe500, Fe550, Fe600, Fe500D & Fe500SD.
There are various grades of TMT bars manufactured by various steel company available in the market. TMT bar have different grade based on their yield tensile strength and rigidity. Grade of TMT bar represented as Fe415, Fe500, Fe550, Fe600, Fe500D & Fe500SD. This grade represents the strength and rigidity of the bar, specifically the yield strength of reinforcement.
It is very necessary to choose the right grade, depending upon the type of structure. During the structural design of the structure, the designer selects the appropriate grade of tmt bar based on the material availability and cost considerations. Most widely used tmt bar/ steel grades are Fe415, Fe500 and Fe550, Fe550 is the strongest among all, which provides sufficient strengths for most of the reinforced concrete applications.
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Different grade of TMT bar available in different sizes like 8mm, 10mm, 12mm, 16mm, 20mm, 25mm and 32mm, and their higher size like is also customise according to requirement and order.
TMT bar grade Fe415
TMT bar grade Fe 415:- in TMT bar grade Fe 415, Fe denotes made of iron, numerical figure 415 stand for their minimum yield strength in N/mm2. This grade of TMT bar commonly used for construction of houses and residential building, they have uniform elongation which make them earthquake resistance. hence they are perfect to build home in earthquake prone area.
Mechanical properties of TMT bar grade Fe 415:- 1) their yield strength (fy) is 415N/mm2, 2) ultimate tensile strength (fu) is 485N/mm2, 3) elongation is 14.5 and 4) YS ratio is 1.16.
Chemical composition of TMT bar grade Fe 415:- it is made of iron mixed with some amount of carbon, sulphur, phosphorus materials by mass, carbon contain is about 0.3%, Sulphur contain is about 0.06%, Phosphorus contain is about 0.06% and S+P is about 0.11%.
TMT bar grade Fe500
TMT bar grade Fe 500:- in TMT bar grade Fe 500, Fe denotes made of iron, numerical figure 500 stand for their minimum yield strength in N/mm2. This grade of TMT bar best suitable for construction of multiple storey and commercial building and it is resistant to corrosion.
Mechanical properties of TMT bar grade Fe 500:- 1) their yield strength (fy) is 500N/mm2, 2) ultimate tensile strength (fu) is 545N/mm2, 3) elongation is 12 and 4) YS ratio is 1.09.
Chemical composition of TMT bar grade Fe 500:- it is made of iron mixed with some amount of carbon, sulphur, phosphorus materials by mass, carbon contain is about 0.3%, Sulphur contain is about 0.055%, Phosphorus contain is about 0.055% and S+P is about 0.105%.
TMT bar grade Fe550
TMT bar grade Fe 550:- in TMT bar grade Fe 550, Fe denotes made of iron, numerical figure 550 stand for their minimum yield strength in N/mm2. This grade of TMT bar best suitable for large-scale project like bridge and construction of heavy underground structure.
Mechanical properties of TMT bar grade Fe 550:- 1) their yield strength (fy) is 550N/mm2, 2) ultimate tensile strength (fu) is 585N/mm2, 3) elongation is 10 and 4) YS ratio is 1.06.
Chemical composition of TMT bar grade Fe 550:- it is made of iron mixed with some amount of carbon, sulphur, phosphorus materials by mass, carbon contain is about 0.3%, Sulphur contain is about 0.06%, Phosphorus contain is about 0.06% and S+P is about 0.11%.
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TMT bar grade Fe600
TMT bar grade Fe 600:- in TMT bar grade Fe 600, Fe denotes made of iron, numerical figure 600 stand for their minimum yield strength in N/mm2. This grade of TMT bar best suitable for large scale industrial construction projects. This is the highest strength TMT bar available in market.
Mechanical properties of TMT bar grade Fe 600:- 1) their yield strength (fy) is 600N/mm2, 2) ultimate tensile strength (fu) is 660N/mm2, 3) elongation is 10 and 4) YS ratio is 1.10.
Chemical composition of TMT bar grade Fe 600:- it is made of iron mixed with some amount of carbon, sulphur, phosphorus materials by mass, carbon contain is about 0.25%, Sulphur contain is about 0.04%, Phosphorus contain is about 0.04% and S+P is about 0.75%.
TMT bar grade Fe 550D
TMT bar grade Fe 550D:- in TMT bar grade Fe 550D, Fe denotes made of iron, numerical figure 550 stand for their minimum yield strength in N/mm2 and D stand for higher bar ductility. This grade of TMT bar best suitable for large scale industrial construction projects. It is best suitable for use in earthquake prone area.
Mechanical properties of TMT bar grade Fe550D:- 1) their yield strength (fy) is 550N/mm2, 2) ultimate tensile strength (fu) is 585N/mm2, 3) elongation is 16.
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TMT bar grade Fe500SD
TMT bar grade Fe 500SD:- in TMT bar grade Fe 500SD, Fe denotes made of iron, numerical figure 500 stand for their minimum yield strength in N/mm2, D stand for higher bar ductility and S stand for super ductility. This grade of TMT bar best suitable for large scale industrial construction projects. It is best suitable for use in earthquake prone area.
Mechanical properties of TMT bar grade Fe500SD:- 1) their yield strength (fy) is 500N/mm2, 2) ultimate tensile strength (fu) is 545N/mm2, 3) elongation is 18.
Uses of 500SD and 550D TMT bar:- D denotes ductility and SD denotes superductility, which means these bars are highly seismically resistant with high strength. Hence they preferred to use in earthquake zone 3, 4 and 5. They have enlongation above 16%, most suitable for Bridge, Dams, high rise Apartment, industrial structural, flyover, windmills, earthquake prone zone, Mountain Bridge, Railway Bridge, structure such as airport, hospitals, tunnels and concrete Road.