Understanding 1018 Bar Stock: Properties, Applications, and More

When it comes to choosing the right material for various applications, 1018 bar stock often stands out as a reliable and versatile option. Whether you’re a seasoned engineer or just getting started with DIY projects, understanding the properties of 1018 bar stock is crucial. In this comprehensive guide, we’ll delve into the characteristics, applications, and frequently asked questions surrounding 1018 bar stock.

1. Introduction

What is 1018 Bar Stock?

1018 bar stock, also known as cold-rolled steel, is a low-carbon steel alloy characterized by its excellent weldability, machinability, and affordability. It derives its name from its chemical composition, primarily consisting of iron, carbon, and a few trace elements.

Why is it Popular?

This material’s popularity can be attributed to its versatility and wide range of applications. 1018 bar stock is widely used in industries such as construction, manufacturing, and automotive due to its combination of strength, ease of fabrication, and cost-effectiveness.

2. Chemical Composition

Carbon Content

The defining characteristic of 1018 bar stock is its low carbon content, typically around 0.18%. This low carbon content contributes to its excellent weldability and machinability.

Other Alloying Elements

In addition to carbon, 1018 bar stock may contain trace amounts of other elements, but they are usually minimal. This makes it a predominantly iron-carbon alloy.

3. Mechanical Properties

Tensile Strength

1018 bar stock has a respectable tensile strength, making it suitable for applications where moderate strength is required. Its tensile strength typically falls between 400 and 550 megapascals (MPa).

Yield Strength

The yield strength of 1018 bar stock is approximately 370 MPa, indicating its ability to withstand a certain amount of stress before permanent deformation occurs.


1018 bar stock is known for its relatively low hardness, making it easy to machine. Its Rockwell hardness typically ranges from 60 to 70 on the B scale.


This material exhibits good ductility, allowing it to be formed into various shapes without cracking or breaking.

4. Physical Properties


The density of 1018 bar stock is approximately 7.85 grams per cubic centimeter (g/cm³), making it relatively dense for a steel alloy.

Melting Point

1018 bar stock has a melting point of around 1,425 degrees Celsius (2,600 degrees Fahrenheit).

Thermal Conductivity

It possesses moderate thermal conductivity, which can be advantageous in certain applications.

Electrical Conductivity

1018 bar stock is a poor conductor of electricity.

5. Manufacturing Process

Hot vs. Cold Rolling

1018 bar stock is typically produced through cold rolling, which involves passing the steel through rollers at room temperature. This process results in improved surface finish and dimensional accuracy.


Annealing is often employed to improve the machinability of 1018 bar stock. It involves heating the material to a specific temperature and then slowly cooling it.

Surface Finish

Cold-rolled 1018 bar stock has a smooth and polished surface finish, which is ideal for many applications.

6. Applications


1018 bar stock is used in construction for various structural components, thanks to its strength and ease of fabrication.


It finds applications in the manufacturing industry for creating machine parts and components due to its machinability.


In the automotive sector, 1018 bar stock is used for manufacturing parts like axles and engine components.

DIY Projects

For DIY enthusiasts, 1018 bar stock is a popular choice for crafting tools, brackets, and various home improvement projects.

7. Advantages and Disadvantages

Pros of 1018 Bar Stock

  • Excellent weldability
  • Good machinability
  • Cost-effective
  • Versatile in various applications
  • Suitable for cold forming

Cons of 1018 Bar Stock

  • Limited strength for some heavy-duty applications
  • Susceptible to corrosion without proper treatment
  • Not as durable as some higher carbon steels

8. FAQs

What are the common applications of 1018 bar stock?

1018 bar stock is commonly used in construction, manufacturing, automotive, and DIY projects due to its versatility and ease of fabrication.

Can 1018 bar stock be welded easily?

Yes, 1018 bar stock is known for its excellent weldability, making it suitable for welding applications.

Is 1018 bar stock suitable for outdoor use?

While it can be used outdoors, it may require additional protective coatings to prevent corrosion in humid or corrosive environments.

How does 1018 bar stock compare to other steel alloys?

Compared to higher carbon steels, 1018 bar stock offers better machinability but may have lower strength and hardness.

Where can I purchase 1018 bar stock?

You can find 1018 bar stock at most metal supply stores, online metal retailers, or local steel distributors. Ensure that you specify the dimensions and quantity you require for your project.

In conclusion, 1018 bar stock is a versatile and cost-effective material with a range of applications. Its unique combination of properties makes it a valuable choice for engineers, manufacturers, and DIY enthusiasts alike. Whether you’re constructing a building, building a machine, or working on a creative project, 1018 bar stock may be the perfect material to bring your ideas to life.

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