A36 Q195 Q235 Q345 40*40*4mm 25*25*3mm Angle Steel

Angle steel, available in premium grades (A36, Q195, Q235, Q345) and fixed dimensional specifications (40*40*4mm, 25*25*3mm), is a high-performance structural component widely applied in construction, machinery manufacturing, and light-duty infrastructure projects. Characterized by its standard L-shaped equal cross-section, this angle steel is engineered to balance structural strength, dimensional precision, and cost-effectiveness, with its defined material grades and sizes catering to targeted application scenarios that demand reliable load-bearing and assembly compatibility.

This angle steel product line features four key material grades, each with distinct mechanical properties to match varied load and environmental requirements. A36, an internationally recognized carbon structural steel grade, offers excellent ductility and weldability, with a minimum yield strength of 250 MPa and tensile strength ranging from 400 to 550 MPa, ensuring stability in medium-load structural applications. Q195, a low-carbon steel grade (Chinese GB/T standard), boasts a minimum yield strength of 195 MPa and tensile strength of 315-430 MPa, characterized by superior formability and machinability, ideal for light-duty structural components.

Q235 and Q345, also adhering to Chinese GB/T standards, further expand the product's applicability. Q235, a cost-effective carbon structural steel, has a minimum yield strength of 235 MPa and tensile strength of 375-500 MPa, making it a staple for general construction, scaffolding, and light machinery frames. Q345, a high-strength low-alloy (HSLA) steel, delivers enhanced load-bearing capacity with a minimum yield strength of 345 MPa and tensile strength of 470-630 MPa, suitable for heavy-duty or high-rise structural components that require resistance to deformation.

The product is available in two precise equal-angle dimensions: 40*40*4mm and 25*25*3mm (leg length * leg length * thickness). The 40*40*4mm specification offers higher cross-sectional area and moment of inertia, providing stronger load-bearing capacity for medium-duty applications such as building frame supports, small bridge components, and equipment bases. The 25*25*3mm specification, with its compact size and lightweight characteristics, is optimized for light-duty scenarios including interior decoration frameworks, light scaffolding, and small machinery brackets.

All grades and sizes of this angle steel are manufactured via advanced hot rolling technology, which refines the material's grain structure and ensures uniform mechanical properties. The hot rolling process involves heating steel billets to temperatures above 1000°C, followed by precision rolling to form the exact L-shaped profile, guaranteeing strict dimensional accuracy and smooth surface quality. This manufacturing advantage enables easy fabrication processes such as cutting, drilling, welding, and bending, facilitating seamless integration with other structural materials like steel plates, pipes, and concrete.

The targeted applicability of A36, Q195, Q235, Q345 angle steel in 40*40*4mm and 25*25*3mm sizes is reflected in diverse industrial scenarios. In residential and commercial construction, the 40*40*4mm specification is used for floor joists, roof truss supports, and balcony railings; the 25*25*3mm size is applied in ceiling frameworks and partition wall reinforcements. In machinery manufacturing, both sizes serve as components for equipment frames, conveyor guides, and chassis brackets, with material grades selected based on load intensity. Additionally, they are widely used in temporary structures such as construction scaffolding and event venues due to their easy assembly and reliable performance.

In summary, the A36, Q195, Q235, Q345 angle steel with 40*40*4mm and 25*25*3mm specifications offers a targeted and reliable structural solution. The combination of distinct material properties and precise dimensional designs ensures optimal performance in both light-duty and medium-duty applications. With excellent machinability, weldability, and adherence to international and domestic standards, this angle steel product line delivers consistent quality and practical value, making it a preferred choice for engineers and project managers in global construction and manufacturing projects.

In summary, the ASTM A36, A53, Q235, and Q345 iron angle bar steel series represents a comprehensive range of structural solutions, combining the reliability of international and domestic standards. Each grade's unique mechanical properties, coupled with the advantages of hot rolling technology, ensure exceptional performance, durability, and versatility. Whether for general construction, heavy-duty infrastructure, or industrial machinery, this product line delivers consistent quality and value, making it a preferred choice for global engineering projects.