Table of content
Introduction
Steel is a metal material that can be found everywhere in industry or daily life. Are all steels the same? Of course not. Steel is also divided into low carbon steel, medium carbon steel, and high carbon steel. What are the differences between these three? Below we will give a detailed introduction around these three types.
What are the three grades of carbon steel?
Low carbon steel: carbon content is less than 0.30%.
Medium carbon steel: carbon content is 0.30%-0.60%.
High carbon steel: carbon content is greater than 0.60%.
What Is the Difference Between Low, Medium, and High-Carbon Steel?
The main difference between these three types is the different carbon content, which results in different performance.
Low carbon steel: carbon content is less than 0.30%, softer and more ductile.
Medium carbon steel: carbon content is 0.30%-0.60%, strength and ductility are good.
High carbon steel: The carbon content is greater than 0.60%, very strong, hard and therefore more brittle.
How does carbon content affect steel properties?
The amount of carbon directly affects the properties of steel.
Low carbon steel is softer, easy to bend, and easy to weld.
Medium carbon steel has moderate hardness and bendability and is more durable.
High carbon steel is harder and more brittle.
High carbon steel properties
Due to its high carbon content, it is hard and brittle, but has strong wear resistance. Therefore, heat treatment is required during processing to improve the performance before processing.
What is high-carbon steel used for?
High carbon steel is suitable for tools that require high hardness, such as knives and cutting tools, as well as some industrial punches and molds.
High carbon steel grades
1095: Has a sharp edge, often used for blades.
1080, 1085: Balanced toughness and hardness.
1060: Mostly used for long knives and long swords.
What is medium-carbon steel used for?
Medium carbon steel has a good balance of strength and ductility. Therefore, it can be used in a variety of tools. For example, gears, axles or tracks and mechanical structural parts.
Medium carbon steel carbon percentage
Medium carbon steel has a carbon percentage between 0.30% and 0.60%, with a small amount of manganese added to increase strength.
What is low-carbon steel used for?
Low carbon steel is a common type of carbon steel that is affordable and easy to manufacture. It can be used in a variety of applications, such as structural beams and building materials, car bodies and steel pipes.
Mild Steel vs Low, Medium & High-Carbon Steel
| Type | Carbon % | Strength | Weldability | Flexibility | Cost |
|---|---|---|---|---|---|
| Low (Mild) | < 0.30% | Low | Excellent | High | Low |
| Medium | 0.30–0.60% | Medium | Moderate | Medium | Moderate |
| High | > 0.60% | High | Poor | Low | Higher |
Carbon Steel vs Cast Iron
Both are iron-carbon alloys, but the carbon content in cast iron is greater than 2%, higher than any carbon steel, which makes its structural properties completely different. Cast iron is brittle and has good heat preservation properties. Carbon steel is tougher and has good ductility.
Summary
The three types of carbon steel, low carbon steel, medium carbon steel and high carbon steel, have different carbon contents, different properties and processing properties. The differences and similarities between the three are introduced above. You can choose according to your specific needs.
