1. Definition

Carbon steel is an alloy with iron and carbon as the main components, usually with a carbon content between 0.05% and 2.0%. Its performance depends mainly on the carbon content, and the content of other alloying elements is lower.

2. Classification

According to the carbon content, carbon steel can be divided into:

Low carbon steel: carbon content ≤ 0.25%, easy to process and weld, often used in construction and automobile manufacturing.

Medium carbon steel: carbon content 0.25%-0.60%, high strength and hardness, suitable for mechanical parts and tools.

High carbon steel: carbon content ≥ 0.60%, excellent hardness and wear resistance, mostly used for knives and springs.

3. Characteristics

Strength and hardness: increase with increasing carbon content.

Plasticity: low carbon steel has good plasticity, high carbon steel is poor.

Weldability: low carbon steel has good weldability, high carbon steel is poor.

Wear resistance: high carbon steel has excellent wear resistance.

4. Application

Construction: used for steel bars, structural parts, etc.

Automobile: used for body, chassis, etc.

Machinery: used for gears, shafts and other parts.

Tools: used for knives, molds, etc.

5. Advantages and Disadvantages

Advantages: low cost, good processability, high strength.

Disadvantages: easy to corrode, high carbon steel has poor weldability.

6. Heat Treatment

The mechanical properties of carbon steel can be improved by heat treatment (such as quenching and tempering), such as increasing hardness and strength.

Summary

Carbon steel is widely used in many fields due to its low cost and excellent performance. Carbon steel with different carbon content is suitable for different industrial needs.