Question

According to IS 800, the modulus of elasticity of steel, irrespective of its grade may be taken as 
1. 200 GPa
2. 2000000 MPa
3. 250 GPa
4. 175 GPa
5. 300 GPa

Answer 1

Correct Answer - Option 1 : 200 GPa

Explanation:

As per 2.2.4.1 of IS 800:2007 Physical properties of structural steel irrespective of its grade may be taken as:

(i) Unit mass of steel (ρ) = 7850 kg/m³

(ii) Modulus of elasticity, E = 2.0 x 105 N/mm2 (MPa) = 200 GPa

(iii) Poisson ratio, μ  = 0.3

(iv) Modulus of rigidity, G = 0.769 x 105 N/mm2 (MPa)

(v) Co-efficient of thermal expansion (α) = 12 x 10-6 per °C