What Are the Physical Properties of 1018 Bar Stock?

When it comes to selecting materials for various applications, having a deep understanding of their physical properties is essential. 1018 bar stock, a type of low-carbon steel, is a versatile material used in a wide range of industries. In this comprehensive guide, we will delve into the physical properties of 1018 bar stock, exploring its characteristics related to density, hardness, thermal conductivity, and more. By the end of this article, you will have a thorough understanding of the physical attributes that make 1018 bar stock a popular choice in manufacturing and fabrication.

Introduction to 1018 Bar Stock

Before we dive into the physical properties, let’s establish a clear understanding of what 1018 bar stock is and its importance in various industries.

What Is 1018 Bar Stock?

1018 bar stock is a type of low-carbon steel known for its exceptional machinability. It belongs to the 1000 series of steels and is characterized by its relatively low carbon content, typically around 0.18%. This composition gives it distinct properties that make it highly sought after for various applications.

Physical Properties of 1018 Bar Stock

Now, let’s explore the key physical properties of 1018 bar stock:

**1. Density

H2: Density of 1018 Bar Stock

The density of 1018 bar stock is approximately 7.85 grams per cubic centimeter (g/cm³). This moderate density makes it suitable for a wide range of applications where a balance between weight and strength is required.

**2. Hardness

H2: Hardness of 1018 Bar Stock

1018 bar stock typically exhibits a hardness ranging from 60 to 75 on the Rockwell B scale. This level of hardness, although not exceptionally high, is sufficient for many machining and fabrication processes.

**3. Tensile Strength

H2: Tensile Strength of 1018 Bar Stock

The tensile strength of 1018 bar stock is approximately 63,800 pounds per square inch (psi). While it may not match the tensile strength of high-carbon steels, it offers adequate strength for a wide range of applications.

**4. Yield Strength

H2: Yield Strength of 1018 Bar Stock

1018 bar stock typically has a yield strength of around 53,700 psi. This is the amount of stress at which the material begins to deform plastically. It is a crucial factor in determining the material’s suitability for various load-bearing applications.

**5. Elongation

H2: Elongation of 1018 Bar Stock

Elongation measures the ability of a material to stretch before breaking. 1018 bar stock exhibits a high elongation percentage, often exceeding 15%. This high ductility makes it suitable for applications involving bending and forming.

**6. Thermal Conductivity

H2: Thermal Conductivity of 1018 Bar Stock

The thermal conductivity of 1018 bar stock is approximately 49.8 watts per meter-kelvin (W/m·K). This property indicates the material’s ability to conduct heat, making it suitable for applications where thermal conductivity is important.

**7. Electrical Conductivity

H2: Electrical Conductivity of 1018 Bar Stock

1018 bar stock has a moderate electrical conductivity. While it’s not an ideal choice for electrical conductivity compared to materials like copper, it can be used in certain electrical applications.

**8. Magnetic Properties

H2: Magnetic Properties of 1018 Bar Stock

1018 bar stock is ferromagnetic, which means it can be magnetized. This property makes it suitable for use in magnetic applications and components.

**9. Corrosion Resistance

H2: Corrosion Resistance of 1018 Bar Stock

1018 bar stock is not inherently corrosion-resistant like stainless steel. However, it can be coated or treated to enhance its resistance to rust and corrosion.

Applications of 1018 Bar Stock Based on Physical Properties

Given its unique physical properties, 1018 bar stock finds use in various applications:

  • Machining: Its exceptional machinability and moderate hardness make it a preferred choice for precision machining.
  • Automotive: The combination of strength, ductility, and magnetic properties makes it suitable for automotive components.
  • Construction: Its density, strength, and weldability are advantageous in construction applications.
  • General Fabrication: 1018 bar stock’s versatility and cost-effectiveness make it a popular choice for general fabrication.

Frequently Asked Questions (FAQ)

Q1: Is 1018 bar stock suitable for high-temperature applications?

A1: 1018 bar stock has limited high-temperature performance due to its low carbon content. It may experience deformation and a loss of strength at elevated temperatures.

Q2: Can 1018 bar stock be heat-treated to increase its hardness?

A2: Yes, 1018 bar stock can undergo heat treatment to increase its hardness, but it won’t reach the same hardness levels as higher carbon steels.

Q3: What industries commonly use 1018 bar stock due to its physical properties?

A3: Industries such as manufacturing, construction, automotive, and general fabrication frequently use 1018 bar stock due to its unique combination of physical properties.

Q4: How can I enhance 1018 bar stock’s corrosion resistance?

A4: To improve corrosion resistance, consider using protective coatings like paint or applying treatments such as galvanizing. Proper maintenance is also important to prevent corrosion.


Understanding the physical properties of 1018 bar stock is essential for making informed decisions about its suitability for your specific applications. Its density, hardness, tensile strength, ductility, and other characteristics make it a versatile material with a wide range of uses. By considering these properties alongside your project’s requirements, you can confidently select and utilize 1018 bar stock in various industries, from manufacturing to construction, where its physical attributes offer valuable advantages.

Share your love
Update cookies preferences