F.A.Q’s

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What does it mean yield strength of re-bar?
The yield point is the point on a stress–strain curve that indicates the limit of elastic behaviour and the beginning plastic behaviour. Yield strength or yield stress is the material property defined as the stress at which a material begins to deform plastically whereas yield point is the point where nonlinear (elastic + plastic) deformation begins.
Prior to the yield point the material will deform elastically and will return to its original shape when the applied stress is removed.
Once the yield point is passed, some fraction of the deformation will be permanent and non-reversible and material will be broken.
How can one calculate the tensile strength of 32mm dia rebar?
To understand the calculation part you should visit the plant and see the entire process of testing.
Tensile Strength — The maximum load reached in a tensile test divided by the effective cross-sectional area of the gauge length portion of the test piece (also termed as ultimate tensile stress).
Gross cross-sectional area, in rnd = W/0.00785 L where
w = mass weighed to a precision of +0.5 percent,in kg; and
L = length measured to a precision of+O.5 Percent
Unit will be in meter.
What is the standard value of yield stress of steel bars?
Yield Stress — Stress (that is, load per unit cross-sectional area) at which elongation first occurs in the test piece without increasing the load during the tensile test. In the case of steels with no such definite yield point, proof stress shall be applicable. 0.2 percent proof stress/ yield stress, Min, N/mm2 415 500 550 600 N/mm2
What is meant by Fe 500 grade steel?
It meant this steel can be bear the load up to 500 kN (under elastic limit) after this it will be broken.
What are the types of reinforcement steel used in concrete?
Reinforcement means making something stronger.
Reinforced concrete (RC) (also called reinforced cement concrete or RCC) is a composite material in which concrete's relatively low tensile strength and ductility are counteracted by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel reinforcing bars (rebar) and is usually embedded passively in the concrete before the concrete sets.
All grades can be used for concrete as per the usability of concrete structure like 415 500 550 600.
What is the difference between Fe500 and Fe500D TMT bars?
Difference in Chemical Composition
Like both P and S will be 0.055 % in Fe 500 together 0.105% and in Fe 500 D it will 0.040 together 0.075 max
Carbon 0.30 and 0.25 respectively
Present of elongation 12% and 16%
Total % of elongation at maximum force will minimum 5% in Fe500 D rest parameter is same.
What is the difference between mild steel and HYSD bars?
HYSD: When expanded, HYSD stands for High Yielding Strength Deformed Steel; and is also their main characteristic. HYSD steel also undergoes heat treatment similar to TMT bars, but the subsequent processes are different. In this type of steel, after undergoing the heat treatment process, the hot steel rods are either heat rolled or cold twisted for shaping, thus making them both thermally and mechanically treated.
What is the difference between rebar and steel?
Only difference is quenching process or thermo mechanical treatment or reinforcement.
By the quenching steel convert into the rebar rest all chemical composition are same only some mechanical properties has been developed.
What is the difference between mild steel and TOR steel?
Mild steel contains approximately 0.05–0.25% carbon making it malleable and ductile. Mild steel has a relatively low tensile strength, but it is cheap and easy to form; surface hardness can be increased through carburizing.
TOR: The technical term for TOR (Toristeg Steel Corporation of Luxembourg) is CTD, which when expanded, stands for Cold Twisted Deformed steel. It is a form of HYSD steel, where the steel bars, after undergoing the mandatory heat treatment process, are cold twisted and deformed. These deformations are present on the surface and are done after an elongation process, which imparts higher yield strength to steel and the surface deformations impart higher bondage with concrete. Because of the deformations, these bars minimize slippage in concrete and increases the bond between the two materials. Deformed bars have a higher tensile strength than that of MS steel bars and the deformations should be uniformly spaced along the length the bar.
What is meant by 500D and 415D print on the steel bars?
It mean Grade of TMT
What are main function of reinforcing bars in concrete?
To give strength to concrete.
Which type of steel is used for construction?
Depend upon the structure design and used of construction for example Bridge and Tower construction is differ.
How does rebar strengthen concrete?
Rebar can be strengthen by different Grade like 415 500 550 or 600
Accordingly concrete will be strengthen depend upon the grade of steel.
How does rebar strengthen concrete?
Rebar can be strengthen by different Grade like 415 500 550 or 600
Accordingly concrete will be strengthen depend upon the grade of steel.