Question

Which of the following has maximum ductility ?
1. Copper
2. Mild Steel
3. Cast Iron
4. 18-4-1 Steel

Answer 1

Correct Answer - Option 2 : Mild Steel

Explanation:

Ductility

• Ductility is the property of the material that enables it to be drawn out or elongated to an appreciable extent before rupture occurs.
• The percentage elongation or percentage reduction in the area before rupture of a test specimen is the measure of ductility. Normally if the percentage elongation exceeds 15% the material is ductile and if it is less than 5% the material is brittle.
• The ductile material commonly used in engineering practice (in order of diminishing ductility) are mild steel, copper, aluminium, nickel, zinc and tin.
• Gold > Platinum > Silver > Copper > Aluminium > Nickel > Zinc > Tin
• Mild steel has a maximum ductility.