Steel Square Bars, crafted from carbon or alloy steel, are precision-engineered structural elements with square cross-sections. Manufactured via hot-rolling or cold-drawing, they ensure dimensional accuracy and smooth finishes for diverse applications. Renowned for strength, corrosion resistance, and machinability, they support construction frameworks, machinery components, automotive systems, and architectural designs. Their versatility extends to load-bearing structures, industrial equipment, and decorative elements, complying with ASTM/ISO standards. Available in sizes from 4mm to 600mm, these bars offer customizable lengths and surface treatments like galvanization, making them essential for infrastructure, manufacturing, and engineering projects worldwide.

Q235 steel square bars are a popular type of carbon structural steel, originating from China but widely used globally. The name "Q235" signifies its minimum yield strength of 235 MPa, while the "Q" refers to the yield point. It is known for its excellent weldability, ductility, formability, and machinability, making it a versatile and cost-effective material. This low-carbon steel is commonly used in construction, manufacturing, and general engineering applications due to its balance of strength and workability.

Q345 steel square bars are a type of high-strength, low-alloy (HSLA) structural steel originating in China. The "Q" indicates the yield point, and "345" refers to its minimum yield strength of 345 MPa. Known for excellent mechanical properties like high tensile strength (470-660 MPa), ductility, and toughness, Q345 is favored for demanding construction and engineering applications. It offers good weldability and comes in subgrades (A, B, C, D, E) based on impact toughness at various low temperatures. Q345 is suitable for projects requiring robust structural components.

A36 steel square bars are a widely used form of A36 carbon structural steel, commonly known as mild steel. This material is characterized by its excellent balance of strength, ductility, weldability, and affordability. Its designation "A36" reflects its minimum yield strength of 36,000 psi. A36 steel is hot-rolled and easily fabricated, making it a popular choice for various applications, including construction, manufacturing, agricultural implements, and ornamental ironwork.

1045 steel square bars are a popular medium-carbon steel widely used in mechanical engineering applications. With a carbon content of approximately 0.45%, it offers a balanced combination of properties, including high strength, moderate weldability, and good machinability. It's stronger and harder than low-carbon steels like 1018, while still retaining better machinability than higher-carbon grades. This versatility makes it ideal for components requiring wear resistance and durability, such as gears, shafts, axles, and studs. Heat treatment can further enhance its mechanical properties.

4130 steel square bars are low-alloy structural steel bars known for their exceptional strength-to-weight ratio and versatility. Composed of chromium, molybdenum, carbon, and manganese, these bars exhibit superior toughness, fatigue resistance, and weldability. Widely used in aerospace, automotive, and machinery industries, they are ideal for manufacturing high-stress components like gears, shafts, and structural frames. 4130 steel can be heat-treated to enhance hardness and tensile strength (up to 670 MPa) while maintaining ductility. Its square cross-section provides stability for precision machining and load-bearing applications. These bars are valued for their corrosion resistance and ability to withstand extreme temperatures, making them a preferred choice for demanding engineering projects.

4340 Steel Square Bars are high-strength, low-alloy steel bars renowned for their exceptional toughness, fatigue resistance, and versatility. Composed of chromium, molybdenum, nickel, carbon, and manganese, these bars offer superior hardenability and wear resistance, making them ideal for demanding applications. 4340 steel can be heat-treated via quenching and tempering to achieve ultimate tensile strengths exceeding 1,400 MPa while maintaining ductility. Its square cross-section ensures stability during precision machining and load-bearing tasks. Valued for withstanding extreme temperatures and heavy loads, these bars are preferred for critical engineering projects requiring durability and reliability.

S235JR Steel Square Bars are non-alloy structural steel bars widely used in construction, engineering, and manufacturing. Composed primarily of carbon, manganese, and trace elements like sulfur and phosphorus, they offer balanced mechanical properties, including good tensile strength (360–510 MPa) and yield strength (235 MPa). Compliant with EN 10025-2 standards, these bars are valued for their excellent weldability, machinability, and formability, making them ideal for structural frameworks, bridges, and machinery components. Cost-effective and versatile, S235JR bars are preferred for projects requiring reliable performance without the complexity of high-alloy steels.

S275JR Steel Square Bars are non-alloy structural steel bars widely used in construction, engineering, and fabrication. Composed primarily of carbon, manganese, and trace elements, they offer enhanced mechanical properties compared to S235JR, with a yield strength of 275 MPa and tensile strength ranging from 410–580 MPa. Compliant with EN 10025-2 standards, these bars excel in weldability, machinability, and formability, making them ideal for load-bearing structures, bridges, and machinery components. Cost-effective and versatile, S275JR bars are preferred for projects requiring higher strength than S235JR while maintaining ease of processing.

S355JR Steel Square Bars are non-alloy structural steel bars widely used in construction, engineering, and heavy fabrication. Composed primarily of carbon, manganese, and trace elements, they offer enhanced mechanical properties with a minimum yield strength of 355 MPa and tensile strength ranging from 470–630 MPa. Compliant with EN 10025-2 standards, these bars excel in weldability, machinability, and formability, making them ideal for load-bearing structures, bridges, and industrial machinery. Cost-effective and versatile, S355JR bars are preferred for projects requiring higher strength than S275JR while maintaining ease of processing.

SS400 Steel Square Bars are carbon structural steel bars widely used in construction, engineering, and fabrication. Composed primarily of carbon and manganese, they offer balanced mechanical properties with a yield strength of 245 MPa and tensile strength ranging from 400–510 MPa. Compliant with JIS G3101 standards, these bars excel in weldability, machinability, and formability, making them ideal for structural frameworks, bridges, and machinery components. Their square cross-section enhances stability in load-bearing designs and precision fabrication. Cost-effective and versatile, SS400 bars are preferred for projects requiring reliable performance without the complexity of high-alloy steels.

H13 Steel Square Bars are high-performance hot work tool steel bars renowned for their exceptional thermal stability, toughness, and wear resistance. Composed primarily of chromium, molybdenum, vanadium, and carbon, these bars exhibit superior hardness and resistance to thermal fatigue, making them ideal for high-temperature applications. Compliant with ASTM A681 standards, H13 bars are widely used in die casting, forging, and extrusion molds where repeated exposure to extreme heat and mechanical stress is common. Their ability to maintain structural integrity under cyclic heating and cooling cycles ensures durability in demanding environments. The square cross-section enhances stability during precision machining and load-bearing tasks.