BS 500 TMT (Thermo-Mechanically Treated) steel bars are commonly used in construction for their superior mechanical properties.
Key mechanical properties include:
1. Yield Strength: BS 500 steel bars typically have a minimum yield strength of 500N/mm2. Yield strength is the stress at which the material begins to deform plastically.
2. Tensile Strength: The tensile strength of these bars has minimum value of 540N/mm2. This is the maximum stress a material can withstand while being stretched or pulled before breaking.
3. Elongation: Elongation measures ductility and it has minimum value of 14%. This means the steel can stretch up to more than 14% of its original length before failure, indicating good ductility.
4. Bendability; ability to be bent without fracturing, typically around 180 degrees depending on bar diameter.
5. Bond Strength: BS 500 rebar are typically ribbed (deformed) to enhance bonding with concrete, providing better load transfer.
6. Weldability; BS 500 rebar are designed to be weldable, this is depending on absence of impurities and considerable amount of carbon equivalent, (CE) of maximum value of 0.52%.