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4130 Round Bar

From aerospace to construction, 4130 round bar is the steel of choice.

Durable and versatile: Get the 4130 round bar

The perfect combination of strength and versatility: 4130 Round Bar Stock

The Versatile and Economical 4130 Round Bar for Your Manufacturing Needs

4130 bar stock is a popular material for larger welded structures due to its low carbon content and optimal combination of strength and toughness. As a round tube or bar stock, it is commonly useful in aircraft structures, bicycles, motorcycles, and other sporting goods.

Investing in this bar provides many benefits such as its high-strength, low-alloy properties, making it ideal for structural applications in the automotive industry. Its round form also makes it easy to work with and handle. Choose 4130 steel bar for your manufacturing needs and experience the advantages it brings.

In the aerospace industry, 4130 bar stock is often used in the construction of aircraft structures, including fuselages, wings, and landing gear. Its high strength-to-weight ratio makes it an ideal material for these applications, where weight savings can have a significant impact on overall performance and efficiency.

In the sporting goods industry, 4130 round bar stock is a popular material for the construction of bicycles, motorcycles, and other high-performance sporting equipment. Its strength and durability make it an excellent choice for applications that require withstanding high stress and impact forces.

4130 Bar Stock Machinability & Welding

4130 bar stock is a versatile and durable alloy that is popular in various industries. Its welding capabilities and machinability make it a popular choice for a range of applications. In addition to its high-quality welding properties, It can be easily cold worked, hot worked, and forged, without any issues. It is also known for its excellent strength and toughness, which makes it an ideal material for high-stress applications.

However, it’s important to note that 4130 bar stock cannot be aged in any way. Aging is a heat treatment process that is used to increase the strength and hardness of some materials, but this cannot be done with 4130 steel. Despite this limitation, the alloy’s unique combination of properties and versatility make it a popular choice for a wide range of applications, including aerospace, automotive, and sporting goods industries.

4130 Round Bar Stock Applications

4130 round bar stock is a versatile and durable low-alloy steel that is helpful in various industries due to its optimal balance of strength and toughness. It is commonly used in structural applications and has a high fatigue limit, making it suitable for applications that require flexibility.

In addition, it is a popular choice for making bicycle frames, tools, and appliances due to its excellent resistance to impact, abrasion, and corrosion, as well as its ability to withstand extreme temperatures and ease of weldability.

4130 round bar stock is a cost-effective option due to its availability and versatility. It is readily available in various sizes and can be machined easily, making it a popular choice for manufacturers. Its strength and durability also make it a reliable option for use in the aerospace and defense industries, where high-performance materials are crucial.



Hardness, Brinell: 

Modulus of Elasticity: 

Elongation at Break:

Ultimate Tensile Strength: 

Tensile Yield Strength: 

7.85 g/cm3


29700 ksi


97200 psi

63100 psi

Chemical Properties









Iron 97.03 – 98.22

0.280 – 0.330

0.80 – 1.10



0.15 – 0.30

0.15 – 0.25

0.40 – 0.60

O’Hare’s 4130 Round Bar  

In addition to its resistance to wear and tear and high tensile strength, O’Hare’s 4130 bar stock is also known for its excellent weldability, machinability, and formability. These properties make it a popular choice in various industries, including aerospace, automotive, and industrial manufacturing.

At O’Hare Precision Metals, we offer a wide range of sizes and lengths of round bars to meet the specific needs of our customers. Our experienced team can also provide custom cutting, grinding, and other value-added services to ensure that you receive the exact product you need for your application. Contact us today to learn more about our 4130 round bar stock and other steel bar products.

Do you have questions about 4130 Alloy? Just contact highly skilled personnel from O’Hare Precision Metals. We are dedicated to providing smooth-flow service.

Request a quote for round bar stocks now!