Mechanical Engineering - Engineering Materials - Discussion

Best explanation. Thank you all.

Manganese is a chemical element; it has symbol Mn and atomic number 25.

It is a hard, brittle, silvery metal, often found in minerals in the combination with iron.

The correct answer is iron, carbon, and chromium.

The alloy steel you are describing is likely a chromium-molybdenum steel, which is a type of work-hardening steel that contains:

- Iron (base metal)
- Carbon (0.2-0.5%): provides strength and hardness
- Chromium (0.5-2%): provides corrosion resistance and hardenability
- Molybdenum (0.2-1%): provides additional strength and hardenability

This type of steel is often used to make heavy equipment, such as:

- Bulldozer blades
- Bucket wheel excavators
- Earthmoving equipment
- Construction machinery

The other options are not correct because:

- Silicon and manganese are common alloying elements in steel, but they are not the primary elements responsible for work hardening and high-strength applications.
- Magnesium is not typically used as an alloying element in steel.

=> Note that the exact composition of the alloy steel may vary depending on the specific application and manufacturer.