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What is Carbon Steel?

Carbon steel, also referred to as carbon steel alloys, is a type of steel that contains a certain amount of carbon (C) in addition to iron (Fe). The term Carbon Steel commonly seen in English indicates that the steel’s composition includes iron and a measurable percentage of carbon.

Based on the carbon content, carbon steels are classified into three categories:

1. Low Carbon Steel


Steels containing up to 0.30% carbon are called Low Carbon Steel or Mild Steel. This type of steel is commonly used in pipe and profile production.

2. Medium Carbon Steel

Steels containing 0.31% – 0.60% carbon are called Medium Carbon Steel. These steels also contain a certain amount of manganese (Mn). They are used in the production of machines, bolts, nuts, gears, transmission shafts, shovels, picks, and similar tools. They can be hardened through heat treatment.

3. High Carbon Steel

Steels containing 0.61% – 1.50% carbon are called High Carbon Steel. They are used to manufacture shafts, springs (spiral and leaf), scissors, bucket teeth, grader blades, high-strength machine parts, and handsaws. These steels are also suitable for hardening through heat treatment.

If you want, I can also make a simple table in English summarizing Low, Medium, and High Carbon Steel with their carbon content, common applications, and heat treatment suitability—perfect for a blog or catalog.

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