Classification of ferrous alloys n Classification of steels

Classification of ferrous alloys:

1.       Cast iron: 2.14-6.67% ( practically <4.5% )
2.      Pure iron/ ingot iron: less then 0.008% c in  a ferrite at room temperature.
3.       Steels: 0.008-2.14% c (practically <1%)

Steel:

Low carbon steel: low carbon steel contains approximately .0.05-0.30% carbon

·         Mild steel (MS) contains 0.016-0.029% carbon nominally ms contains 0.2% carbon.

·         It is often used when large quantities of steel are needed, for example as structural steel.

Medium carbon steel: It contains approximately .30-0.59% carbon content. It balances ductility and strength. It has good wear resistance. Used for large part, forging and automotive components.

Classification of steels:

High carbon steel:  it contains approximately 0.06-0.99% carbon content. It is very strong and used for springs and high strength wires.

Ultra high carbon steel:  it contains approximately 1.0-2.0% carbon content. These steels can be tempered to great hardness. These are used for special purposes like (non-industrial-purpose) knives, axles or punches. Most steels with more than 1.2% carbon content are made using powder metallurgy.

Note that: steel with a carbon content above 2.14% is considered cast iron.