Mechanical Engineering - Engineering Materials - Discussion

The correct answer is: medium carbon steel.

Steel containing 0.8 to 1.5% carbon is classified as medium carbon steel. This range of carbon content provides a balance of strength, toughness, and weldability, making it suitable for a wide range of applications.

Here's a brief overview of the classification:

- Mild steel: Contains up to 0.3% carbon, known for its ductility and weldability.
- Dead mild steel: Contains up to 0.1% carbon, known for its high ductility and low strength.
- Medium carbon steel: Contains 0.3 - 1.5% carbon, known for its balance of strength, toughness, and weldability.
- High carbon steel: Contains 1.5 - 2.1% carbon, known for its high strength, hardness, and wear resistance.

Medium carbon steel (0.8-1.5% carbon) is often used in applications such as:

- Axles
- Gears
- Shafts
- Crankshafts
- Machine parts

The exact classification and application of steel can vary depending on the specific industry, country, or organization.

Dead mild steel- less than 0.15.
Mild steel 0.15-0.3.
Medium carbon-0.3-0.8.
High carbon steel 0.8-1.5.

Low carbon steel - 0.02 - 0.04 %c.

Medium carbon steel - 0.04 - 0.065 %c.

High carbon steel - 0.065 - 1.5 %c.