Question

Tensile strength of mild steel is-
1. 1400 to 1800 kg/cm²
2. 1800 to 2500 kg/cm²
3. 4200 to 5400 kg/cm²
4. 5500 to 5700 kg/cm²

Answer 1

Correct Answer - Option 3 : 4200 to 5400 kg/cm²

Explanation:

(i) Low-carbon steel, also known as mild steel is now the most common form of steel because its price is relatively low while it provides material properties that are acceptable for many applications.

(ii) Low-carbon 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

Properties of Mild steel:

Properties	Value
Density	7850 kg/m3
ultimate tensile strength	400 - 550 MPa (4000 - 5500 kg/cm2)
Yield strength	250 MPa
Young's modulus of Elasticity	200 GPa
Melting point	1450°