Steel Round Bar is a versatile product widely used in construction, machinery manufacturing, engineering, automotive, mining, and industrial fabrication. Available in carbon steel and alloy steel grades, it offers excellent strength, durability, and reliable machining performance. Our steel round bars are manufactured with precise dimensions, smooth surface quality, and consistent mechanical properties to meet international standards. Various diameters and lengths are available, with custom cutting and processing services provided upon request. Supported by strict quality control, competitive factory pricing, and fast global delivery, we are committed to supplying dependable steel solutions for projects of every scale. Contact us today for detailed specifications, competitive quotations, and professional service.

4140 Steel Round Bar is a high-strength alloy steel bar widely used for applications requiring excellent toughness, wear resistance, and fatigue strength. With chromium and molybdenum alloying elements, it offers superior hardenability, impact resistance, and mechanical performance compared with standard carbon steel bars. 4140 round bars can be supplied in hot rolled, forged, or heat-treated conditions, including annealed, normalized, quenched, and tempered states. It is commonly used for shafts, gears, bolts, axles, molds, and heavy-duty machinery components. We provide 4140 Steel Round Bar with reliable quality, precise dimensions, and customized cutting and processing services to meet global industrial requirements.

4340 Steel Round Bar is a high-strength nickel-chromium-molybdenum alloy steel bar designed for applications requiring exceptional toughness, fatigue resistance, and impact strength. Compared with 4140 steel, 4340 offers higher hardenability and improved mechanical performance due to its nickel alloy content. It maintains excellent strength after heat treatment, including quenching and tempering, making it suitable for heavy-duty and critical components. 4340 round bar is widely used for aircraft parts, gears, shafts, landing gear components, high-strength bolts, and industrial machinery. We supply 4340 Steel Round Bar with accurate dimensions, reliable quality, and customized processing services for global customers.

1045 Steel Round Bar is a medium carbon steel bar widely used for general engineering and mechanical applications requiring good strength, hardness, and machinability. With a carbon content of approximately 0.45%, it provides a balanced combination of tensile strength, wear resistance, and toughness compared with low carbon steel. 1045 round bar can be supplied in hot rolled, cold drawn, turned, polished, or heat-treated conditions to meet different processing requirements. It is commonly used for shafts, axles, gears, bolts, pins, machine parts, and automotive components. We provide 1045 Steel Round Bar with precise dimensions, stable quality, and customized cutting services for worldwide industrial customers.

1018 Steel Round Bar is a low carbon steel bar known for its excellent machinability, weldability, and surface finishing performance. With a carbon content of approximately 0.18%, it offers good ductility and toughness while maintaining sufficient strength for general engineering applications. Compared with medium carbon steel bars, 1018 provides easier machining and forming characteristics, making it ideal for manufacturing precision components. It is widely used for shafts, pins, bushings, bolts, fasteners, and machine parts. Available in hot rolled, cold drawn, and turned conditions, 1018 Steel Round Bar is supplied with accurate dimensions, reliable mechanical properties, and customized processing options for global customers.

ASTM A36 Steel Round Bar is a widely used carbon structural steel bar offering excellent weldability, machinability, and reliable mechanical performance. Manufactured according to ASTM A36 standards, it provides a balanced combination of strength, ductility, and cost-effectiveness for general construction and fabrication applications. Compared with higher-grade alloy steels, A36 round bar is easier to process and suitable for welding, cutting, and forming operations. It is commonly used for shafts, support structures, machinery parts, bolts, frames, and general engineering components. We supply ASTM A36 Steel Round Bar in various diameters and lengths with strict quality control, customized cutting, and dependable export service.

Astm A572 Steel Round Bar Is A High-strength, Low-alloy Structural Steel Material Featuring Grades 42, 50, 60, And 65. With alloying elements such as manganese and other microalloy additions, A572 provides higher yield strength and better load-bearing capacity than conventional carbon steel grades like A36. It offers excellent weldability, toughness, and durability, making it suitable for demanding engineering environments. ASTM A572 round bars are widely used in bridges, heavy machinery, structural components, transportation equipment, and industrial fabrication. We supply ASTM A572 Steel Round Bar with precise dimensions, stable quality, and customized processing services to meet international project requirements.

C45 Steel Round Bar is a medium carbon steel bar widely used for mechanical engineering applications requiring good strength, hardness, and wear resistance. With a carbon content of approximately 0.45%, C45 offers a balanced combination of toughness, machinability, and heat treatment capability. It can be supplied in hot rolled, cold drawn, peeled, or quenched and tempered conditions to meet different industrial requirements. Compared with low carbon steels, C45 provides higher strength and better surface hardness after heat treatment. It is commonly used for shafts, axles, gears, bolts, machine components, and automotive parts. We supply C45 Steel Round Bar with reliable quality, accurate dimensions, and customized services.

S45C Steel Round Bar is a Japanese JIS standard medium carbon steel bar known for its excellent balance of strength, toughness, and machinability. With a carbon content of around 0.45%, it provides higher hardness and tensile strength than low carbon steel while maintaining good processing performance. S45C round bar can be heat treated through quenching and tempering to improve wear resistance and mechanical properties. It is widely used in manufacturing shafts, gears, pins, bolts, molds, automotive components, and precision machinery parts. We supply S45C Steel Round Bar in hot rolled, cold drawn, and polished finishes with accurate sizes, stable quality, and customized cutting services.

42CrMo Steel Round Bar is a high-strength chromium molybdenum alloy steel bar widely recognized for its excellent toughness, hardenability, and fatigue resistance. Manufactured according to Chinese GB/T standards, it is equivalent to 4140 steel in many international markets. The addition of chromium and molybdenum provides superior strength, wear resistance, and stability after heat treatment, especially under heavy loads and impact conditions. 42CrMo round bar is commonly used for shafts, gears, hydraulic components, connecting rods, bolts, and heavy machinery parts. We supply 42CrMo Steel Round Bar in hot rolled, forged, annealed, and quenched & tempered conditions with precise dimensions and reliable export quality.

Q345 Steel Round Bar is a high-strength low-alloy structural steel bar widely used for engineering and construction applications requiring good strength, toughness, and weldability. Compared with ordinary carbon steel grades, Q345 offers higher yield strength and improved load-bearing performance, making it suitable for medium and heavy-duty structures. It features excellent cold and hot forming properties and reliable performance in various working conditions. Q345 round bar is commonly used for machinery parts, structural supports, shafts, frames, and fabrication components. We supply Q345 Steel Round Bar in various diameters and lengths with strict quality control, accurate dimensions, and customized processing services for global customers.

S235JR Steel Round Bar is a European standard low carbon structural steel bar widely used for general engineering, fabrication, and construction applications. Manufactured according to EN 10025 standards, it offers a reliable combination of strength, ductility, weldability, and cost efficiency. The “JR” designation indicates impact toughness tested at room temperature, ensuring dependable performance in structural applications. Compared with higher-strength alloy steels, S235JR provides excellent forming and welding characteristics, making it easy to process and fabricate. It is commonly used for shafts, supports, frames, bolts, machinery components, and general steel structures. We supply S235JR Steel Round Bar with precise sizes, stable quality, and customized services.