ASTM A36 JIS Ss400 Q235 Q345 S235jr 40X40X4mm Hot Rolled Steel Iron Angle Bar

Our ASTM A36 JIS Ss400 Q235 Q345 S235jr 40X40X4mm Hot Rolled Steel Iron Angle Bar is a precision-engineered structural component, featuring a fixed equal leg specification (40mm×40mm leg length, 4mm thickness) and manufactured from globally recognized carbon steel grades. As a hot-rolled equal angle bar, it integrates consistent mechanical performance, excellent structural stability, and reliable processability, making it an ideal choice for diverse industrial, construction, and manufacturing applications that demand standardized dimensions and superior load-bearing capacity.

A core advantage of our angle steel lies in the superior quality of the base materials employed. We utilize high-grade steel grades including Q195, Q235, and S235, all of which are renowned for their excellent mechanical properties. Q195 steel offers reliable ductility and formability, making it suitable for applications requiring moderate strength and easy processing. Q235, a widely used carbon structural steel, exhibits outstanding tensile strength, yield strength, and toughness, ensuring stable performance in load-bearing structures. S235, compliant with international standards, boasts consistent chemical composition and mechanical properties, facilitating its application in cross-border projects and scenarios with strict quality certifications.

In terms of manufacturing craftsmanship, our angle steel undergoes a sophisticated production process that includes precision hot rolling, strict dimension control, and advanced surface treatment. The hot rolling process enhances the steel's internal structure, improving its strength and structural integrity, while the rigorous dimension inspection ensures that each product adheres to the specified tolerances, guaranteeing accurate fitting in assembly. The surface treatment, which may include pickling, phosphating, or galvanizing (optional), effectively prevents corrosion, extends the product's service life, and enhances its aesthetic appearance.

Structurally, the fixed 40X40X4mm equal leg L-shaped cross-section endows the angle bar with exceptional torsional rigidity and balanced load-bearing capacity. The symmetric leg design ensures uniform stress distribution when subjected to axial or bending loads, making it particularly suitable for assembling symmetric structural components such as frames, brackets, supports, and crossbeams. The 4mm thickness and 40mm leg length strike an optimal balance between weight and strength, enabling it to bear moderate to heavy loads while maintaining structural lightness-ideal for applications where space and weight constraints exist. Additionally, the inherent properties of the selected carbon steel grades enhance the angle bar's resistance to deformation and fatigue, ensuring long-term stability in both static and cyclic load scenarios.

This 40X40X4mm hot-rolled steel angle bar, available in multiple global standard grades, finds extensive applications across industries worldwide. In the construction sector, it is widely used in residential/commercial building frames, roof trusses, stair railings, prefabricated wall panels, and bridge auxiliary structures. In machinery manufacturing, it serves as key components in equipment frames, tool bases, conveyor supports, and agricultural machinery parts. It is also a staple in infrastructure projects such as power transmission tower brackets, communication tower components, highway guardrail supports, and port facility frameworks. Additionally, it is suitable for fabricating storage racks, scaffolding crossbars, and industrial workshop platforms, thanks to its standardized dimensions that enable quick assembly and interchangeability.

Quality assurance is strictly implemented throughout the production cycle. Raw material inspections verify the chemical composition and mechanical properties of each steel grade (ASTM A36, JIS Ss400, Q235, Q345, S235jr) to ensure compliance with respective standards. In-process inspections monitor hot-rolling temperature, rolling speed, and dimensional accuracy to avoid deviations. Final inspections include tensile testing, bending testing, impact testing, and surface quality checks, with all products passing rigorous tests before delivery. Each batch is accompanied by a traceable quality certificate, documenting material specifications, test results, and compliance with international standards. The fixed 40X40X4mm specification ensures batch consistency, reducing assembly errors and improving construction efficiency for customers.

As a standardized, high-performance structural solution, the ASTM A36 JIS Ss400 Q235 Q345 S235jr 40X40X4mm Hot Rolled Steel Iron Angle Bar combines global standard compatibility, fixed-dimension convenience, and reliable mechanical performance. Whether for international construction projects, machinery manufacturing, or infrastructure development, it provides engineers and contractors with a cost-effective, interchangeable material that enhances structural stability and construction efficiency. Its consistent quality and broad applicability make it a trusted choice in the global structural steel market.