Carbon Steel Round Bar, a cylindrical carbon steel product, is manufactured through hot rolling, forging, or cold drawing, offering high strength, excellent machinability, and weldability. Available in low, medium, or high carbon grades, it is widely used in construction, machinery, automotive, and infrastructure sectors for rebars, bolts, structural parts, and seamless tube blanks. With diameters ranging from Φ5mm to Φ600mm and customizable lengths, it provides design flexibility. Surface finishes like black, galvanized, or polished enhance corrosion resistance, while its cost-efficiency and adaptability to complex applications make it a preferred choice in engineering and manufacturing.

A36 carbon steel round bar is the most common, hot-rolled, low-carbon structural steel used for general-purpose applications due to its excellent weldability, strength, and affordability. It is typically sold with a rough, blue-grey finish known as a mill finish.

A572 carbon steel round bar is a high-strength, low-alloy (HSLA) structural steel, commonly Grade 50, featuring superior strength-to-weight ratios, excellent weldability, and enhanced corrosion resistance. It is widely used in construction, bridges, and heavy machinery, offering better performance than standard structural steel like A36.

1045 carbon steel round bars are a widely utilized medium-carbon steel prized for their excellent balance of strength, machinability, and impact resistance. Stronger than low-carbon grades, 1045 is ideal for applications requiring moderate mechanical properties and durability.

1006 carbon steel round bars are a very low-carbon steel characterized by exceptional softness and ductility. With a carbon content below 0.08%, it offers excellent cold formability, making it ideal for applications requiring severe bending, stamping, or deep drawing. It also possesses superb weldability, with preheating typically unnecessary. This material is widely used for lightly stressed parts, such as wire, fencing, concrete piping, nails, automotive panels, and various appliance components.

4140 is a high-strength chromium-molybdenum alloy steel prized for its exceptional toughness and fatigue resistance. Unlike standard carbon steels, its alloying elements allow for deep hardening through heat treatment, making it ideal for high-stress components. Common applications include axles, crankshafts, gears, and high-tensile bolts. It offers excellent atmospheric corrosion resistance and high impact strength.

4130 carbon steel round bar is a versatile, low-alloy steel known for its excellent strength-to-weight ratio and toughness. Composed of chromium and molybdenum, it offers enhanced hardenability and resistance to fatigue, making it ideal for applications requiring high stress tolerance, such as aircraft components, automotive parts, and structural frameworks. This material can be heat-treated to achieve tensile strengths up to 860 MPa while maintaining good ductility. Its weldability and machinability further add to its popularity in industries like aerospace, motorsports, and tool manufacturing.

1010 carbon steel round bars are a widely utilized low-carbon, mild steel known primarily for excellent formability, high ductility, and superb weldability. With a very low carbon content (0.10% max), it is ideal for applications requiring extensive cold forming like bending and stamping. This grade is easily welded using all standard methods, typically without preheating. Common uses include general hardware items, wire products, bolts, screws, and lightly stressed machine parts where strength is secondary to workability.

8620 is a popular nickel-chromium-molybdenum alloy steel designed specifically for case hardening applications. Its primary benefit lies in its ability to achieve a very hard, wear-resistant surface (case) while retaining a tough, shock-absorbent core. This combination is ideal for high-impact, high-wear parts. It exhibits good machinability in the annealed condition and is readily weldable. Common applications include gears, shafts, heavy-duty pins, and bushings, particularly where strength, durability, and a hardened surface are critical requirements.

Q235 Carbon Steel Round Bar, compliant with GB/T700 standards, is a low-carbon structural steel (C≤0.22%, Mn≤1.40%) with a minimum yield strength of 235 MPa and tensile strength of 375-500 MPa. It offers excellent weldability, formability, and cost-efficiency, making it ideal for general structural components, machinery parts, and fabrication projects. Widely used in construction, bridges, and automotive applications, it balances mechanical performance with ease of processing for reliable everyday engineering solutions.

Q345 Carbon Steel Round Bar, a low-alloy high-strength structural steel, boasts a minimum yield strength of 345 MPa and tensile strength ranging from 470 to 630 MPa. With excellent weldability, corrosion resistance, and low-temperature toughness (down to -40°C for Q345E grade), it is widely used in bridges, buildings, machinery, and automotive components. Compliant with GB/T1591-2008 standards, this versatile material ensures reliability in demanding engineering applications.

1020 carbon steel round bar is a low-carbon, mild steel grade known for its excellent formability, weldability, and machinability. With a carbon content of approximately 0.20%, it offers a balanced combination of strength and ductility, making it suitable for applications requiring moderate load-bearing capacity, such as shafts, rods, and structural components. This material is easy to cold draw or forge and responds well to heat treatment for improved surface hardness. Its affordability and versatility have made it widely used in automotive, construction, and general engineering industries where reliable, cost-effective performance is prioritized.