25mm X 25mm 20X20X2 100X100X12 200X200X25 Grade Q235B Ss540 4140 Equal Angle Steel

25mm X 25mm 20X20X2 100X100X12 200X200X25 Grade Q235B SS540 4140 Equal Angle Steel is a high-performance structural steel product characterized by its fixed standard specifications, diverse premium material grades, and symmetrical equal L-shaped cross-section. Engineered to meet strict industry standards and diverse load-bearing requirements, this equal angle steel integrates four core standard sizes and three high-quality steel grades, making it a versatile and reliable material for various industrial, construction, and engineering projects worldwide.

The product's superior mechanical performance and wide applicability are rooted in its three carefully selected steel grades-Q235B, SS540, and 4140-each with strictly controlled chemical compositions and mechanical properties tailored to different project demands. Q235B, a Chinese national standard (GB/T 700) carbon structural steel, features a carbon content of 0.12%-0.20% and manganese content of 0.30%-0.70%, offering a minimum yield strength of 235 MPa and a tensile strength range of 370-500 MPa. The "B" grade ensures notch impact resistance at 20°C, providing excellent ductility and weldability, making it ideal for medium-load applications such as light building frames, balcony railings, and small-scale structural supports.

SS540, a high-strength structural steel, delivers enhanced load-bearing capacity with a minimum yield strength of 540 MPa and a tensile strength range of 600-750 MPa. Its optimized chemical composition, including appropriate manganese and silicon additions, ensures superior toughness and wear resistance, suitable for heavy-load scenarios such as industrial machinery supports, large-scale building frameworks, and high-stress structural connections. Complementing these grades, 4140 is a chromium-molybdenum alloy steel, boasting a minimum yield strength of 415 MPa and tensile strength of 655-800 MPa, renowned for its excellent hardenability, toughness, and fatigue resistance, making it ideal for high-demand applications like heavy machinery components and precision structural parts.

This equal angle steel offers four fixed standard sizes to cater to diverse project needs, all manufactured with strict dimensional accuracy. The specifications include 20X20X2mm (leg length 20mm, thickness 2mm), 25mm×25mm (leg length 25mm, thickness ranging from 2mm to 6mm), 100X100X12mm (leg length 100mm, thickness 12mm), and 200X200X25mm (leg length 200mm, thickness 25mm). Each size adheres to strict dimensional tolerances, ensuring seamless integration with other structural components and compatibility with standard assembly processes. The equal L-shaped cross-section ensures balanced force distribution, reducing stress concentration and enhancing the overall structural stability of the projects it is applied to.

The manufacturing process of this equal angle steel combines advanced hot-rolling technology, ensuring the material's internal grain structure is refined and free from defects such as pores, inclusions, and microcracks. Hot rolling involves heating steel billets to temperatures above 1000°C, followed by precision rolling to form the symmetrical equal L-shaped cross-section. This process enhances the material's ductility, toughness, and structural integrity, making it easy to cut, bend, weld, and drill without compromising performance. All sizes are produced with uniform thickness and leg length, ensuring consistency across batches and reliable performance in practical applications.

Exceptional workability is a key attribute of this equal angle steel, with all grades compatible with standard welding methods (arc welding, MIG welding, TIG welding) and other fabrication processes. The material's ductility allows for flexible bending and forming, adapting to customized project designs without cracking or losing structural strength. Additionally, the surface of the angle steel can be further treated with hot-dip galvanization, electro-galvanization, or painting to enhance corrosion resistance, extending its service life in outdoor, humid, or corrosive environments such as infrastructure projects and outdoor construction.

Due to its diverse size range, premium material grades, and excellent performance, this equal angle steel is widely applied across multiple industries. The 20X20X2mm and 25mm×25mm sizes are ideal for light-load applications such as residential railings, small building frames, and decorative structures. The 100X100X12mm size is suitable for medium to heavy-load scenarios like industrial factory frameworks, roof trusses, and floor joists. The 200X200X25mm size, with its thick cross-section and high-strength material options (SS540, 4140), is designed for heavy-duty applications such as bridge bracings, heavy machinery supports, and large-scale infrastructure projects.

Each batch of this equal angle steel undergoes rigorous quality control procedures to ensure compliance with industry standards. Inspections include chemical composition analysis, mechanical property testing (yield strength, tensile strength, impact toughness), dimensional accuracy verification, and surface quality assessment. This strict quality control ensures that every product meets the high-performance requirements of diverse projects, delivering consistent reliability and durability. Combining versatile sizes, premium material grades, and excellent workability, this equal angle steel is a trusted choice for modern global engineering projects, balancing performance, adaptability, and cost-effectiveness.