Product Introduction

1018 Carbon Steel Round Bar, a low-carbon steel with 0.15-0.20% carbon and 0.60-0.90% manganese, offers balanced strength, ductility, and machinability. Its tensile strength ranges from 380-550 MPa, yield strength of 220-300 MPa, and 15-20% elongation, ensuring reliable performance in structural and mechanical applications. This steel excels in cold and hot forming, welding, and machining processes, making it ideal for manufacturing shafts, bolts, pins, and automotive components. Its low carbon content minimizes brittleness and enhances weldability, while trace phosphorus/sulfur (<0.04%) ensures clean surface finish. Commonly used in construction, machinery, and automotive sectors, 1018 provides cost-effective performance where high-strength alloys are unnecessary. Protective coatings or case hardening (e.g., carburizing) can extend its lifespan in corrosive environments. With consistent mechanical properties, broad industry compatibility, and ease of fabrication, 1018 remains a staple for projects prioritizing affordability, versatility, and reliable performance across diverse engineering applications.

About Us

Zhongxi Metal is a professional manufacturer engaged in the research, development, production, sale and service.,  is committed to providing one-stop steel procurement services for global client.

Why Choose 1018 Carbon Steel Round Bar?

1. Superior Machinability for Precision Manufacturing

1018 carbon steel round bars, with 0.15-0.20% carbon content, excel in machinability, enabling high-speed turning, milling, and drilling with minimal tool wear. This property reduces production time and costs, making it ideal for precision components like bolts, spindles, and hydraulic fittings requiring tight tolerances.

2. Excellent Weldability and Formability

The low carbon content ensures minimal cracking risk during welding and facilitates cold/hot forming processes such as bending, crimping, and stamping. This versatility supports applications in structural frameworks, automotive chassis, and industrial fixtures where ductility and weld integrity are critical.

3. Balanced Strength and Toughness

Through cold drawing or heat treatment (e.g., annealing), 1018 achieves a tensile strength of 440 MPa (63,800 psi) and 15% elongation, offering resilience against impact and cyclic loads. This balance makes it suitable for shafts, gears, and axles in moderate-stress environments.

4. Cost-Effective Performance

Compared to alloy steels (e.g., 4140) or higher-carbon grades, 1018 provides reliable mechanical properties at a lower material cost. Its affordability and consistent quality make it a preferred choice for bulk production, automotive components, and general engineering applications where corrosion resistance is secondary.

5. Versatile Surface Finish and Adaptability

Cold-drawn 1018 bars deliver smooth surface finishes and dimensional accuracy, while carburizing enhances surface hardness (up to 58 HRC) for wear-resistant applications. This adaptability supports diverse uses, from carburized gears and sprockets to decorative and structural elements in furniture and machinery.

We have our own Physical & Chemical Testing Center Lab to guarantee our product quality. Our test items & instrument fully meet international standards.

Applications of Carbon Steel Round Bar

As a basic industrial material, carbon steel round bars play a key role in many fields with their excellent mechanical properties and wide applicability. In the field of construction and infrastructure, carbon steel round bars are often used to manufacture core components such as beams, columns, bridges, and steel structures. Their high strength and good plasticity can withstand complex mechanical loads and ensure structural stability. For example, low-carbon steel round bars (carbon content ≤ 0.25%) are widely used in steel bars, bolts, and mechanical parts due to their easy processing and good welding performance; medium-carbon steel round bars (carbon content 0.25%~0.6%) are suitable for high-load components such as shafts, gears, and seamless steel pipe billets due to their balance of strength and toughness. In addition, in the energy industry, carbon steel round bars are used for oil/gas pipelines, power generation equipment, and nuclear power plant structural parts. Their high temperature resistance and corrosion resistance meet the requirements of extreme working conditions.

In the field of automobile and machinery manufacturing, the application of carbon steel round bars is also indispensable. In the automotive industry, it is used in components such as body frames, chassis, engine brackets, and wheels to provide safe and reliable mechanical support. High carbon steel round bars (carbon content > 0.6%) are often used to manufacture cutting tools, bearings and springs due to their extremely high hardness to ensure wear resistance and service life. For example, W1 tool steel round bars are used to make chisels, punches, woodworking tools, swords and knives with their excellent wear resistance, hardenability and toughness. They are especially suitable for cutting tasks that require high precision and durability. In addition, carbon steel round bars are also widely used in the manufacture of equipment such as pipes, boilers, containers, railway vehicles and electric welders. Special purpose round steel (such as prestressed steel wire, spring round steel) shows unique value in specific fields. Its diverse performance and specifications make carbon steel round bars an indispensable basic material in modern industry.

Contact Us

As a leading company, Zhongxi Metal is known for our excellent product quality and professional services, providing our customers with a reliable partner. We have a global sales network that can meet the needs of customers in different countries and regions.If you need more information about us or have any other needs, please feel free to contact us. We look forward to working with you to create a better future.