Mechanical Engineering - Machine Design - Discussion

Mild steel is the most ductile.

Copper is more ductile compared to Mild steel.

Pure iron is more ductile than copper, but the addition of carbon increases the strength and decreases the ductility so here copper is the answer.

Gold, silver platinum iron nickel copper aluminium tungsten tin zinc-lead is the descending order of ductility.

The correct answer is: Copper.

Copper is known for its high ductility, with a ductility percentage of around 50-60%. This means that copper can be stretched and deformed significantly without breaking.

Here's a rough ranking of the ductility of the materials listed:

1. Copper (50-60%)
2. Mild steel (20-30%)
3. Aluminium (10-20%)
4. Zinc (5-10%)

Mild steel has moderate ductility, while aluminium and zinc have relatively lower ductility.

Copper's high ductility makes it an ideal material for applications like:

- Electrical wiring
- Plumbing
- Architectural features
- Coins

Note: Ductility can vary depending on the specific alloy, processing history, and testing conditions, but copper generally has the highest ductility among the options listed.