Q235 hot-rolled 120-degree angle steel, available in both equal and unequal leg configurations with the standard specification of 100×100×5, is a specialized structural component engineered for applications requiring non-standard angular support and load-bearing. As a high-quality carbon structural steel product, it combines the reliable mechanical properties of Q235 steel, precision hot-rolling manufacturing, and a unique 120-degree L-shaped cross-section, making it a versatile choice for specialized construction, engineering, and custom fabrication projects that demand precise angular alignment and structural stability.
Crafted from Q235 carbon structural steel, this 120-degree angle steel boasts consistent and reliable mechanical properties that underpin its performance in specialized applications. Q235 is a low-carbon steel grade with a controlled chemical composition, featuring a minimum yield strength of 235 MPa and tensile strength ranging from 375 to 450 MPa. It exhibits excellent ductility, weldability, and machinability, allowing for easy forming, cutting, and assembly-critical for custom structural applications that require precise fitting. The material's balanced properties ensure it can withstand moderate to heavy loads while maintaining structural integrity, making it suitable for both static and moderately dynamic load scenarios in specialized projects.
The defining feature of this product is its unique 120-degree angular design, which differentiates it from standard 90-degree angle steel and caters to specialized structural needs. Unlike the conventional right angle, the 120-degree angle between the two legs provides enhanced structural stability in applications where diagonal support, triangular framing, or non-perpendicular connections are required. The product is available in both equal and unequal leg configurations, with the 100×100×5 specification representing the equal leg variant-where both legs measure 100mm in length and 5mm in thickness, forming a symmetrical 120-degree L-shape that ensures uniform force distribution across the cross-section.
The 100×100×5 equal leg 120-degree angle steel is meticulously manufactured through a precision hot-rolling process, ensuring dimensional accuracy and structural consistency. Steel billets of Q235 are heated to a controlled temperature of approximately 1200℃-above the recrystallization temperature-to soften the material, then subjected to specialized rolling with custom dies to form the 120-degree angle and 100×100×5 dimensions. Precision rolling ensures uniform leg thickness, accurate angular alignment (strictly adhering to 120 degrees), and a smooth surface finish, eliminating dimensional deviations that could compromise structural performance. Post-rolling, the angle steel undergoes controlled cooling to refine the grain structure, relieve internal stresses, and enhance toughness, ensuring each piece meets the rigorous requirements of specialized structural applications.
In addition to the standard 100×100×5 equal leg configuration, the Q235 120-degree angle steel is also available in unequal leg variants, where the two legs feature different lengths (while maintaining the 120-degree angle) to accommodate asymmetric load-bearing needs. The unequal leg design provides directional strength, making it suitable for specialized scenarios such as triangular trusses, diagonal bracing, and custom structural frames where load distribution is uneven. Both equal and unequal leg configurations retain the same Q235 material properties and 120-degree angular design, ensuring versatility across diverse specialized projects.
This Q235 hot-rolled 120-degree angle steel (including the 100×100×5 specification) complies with relevant industrial standards for carbon structural steel, ensuring dimensional precision, material uniformity, and performance consistency. The 100×100×5 equal leg variant is particularly suited for applications requiring symmetrical 120-degree support, such as triangular roof trusses, diagonal bracing in industrial frames, custom steel fabrications, and specialized engineering structures. Its 5mm thickness provides substantial load-bearing capacity, while the 100mm leg length offers sufficient contact area for secure connection with other structural components.
Widely applied in specialized structural scenarios, this Q235 120-degree angle steel is an indispensable component for projects that require non-standard angular support. It is commonly used in the construction of triangular trusses, custom steel frames, diagonal bracing systems, and specialized industrial equipment supports; in engineering projects for bridge auxiliary structures, offshore platforms, and power transmission towers; and in custom fabrication for architectural features, machinery frames, and non-standard structural connections. Its excellent weldability allows for seamless integration with other steel sections, while its Q235 material ensures long-term durability and reliability in diverse environmental conditions.
With its unique 120-degree angular design, reliable Q235 material properties, precision hot-rolling manufacturing, and versatile equal/unequal leg configurations, this angle steel meets the specialized demands of modern construction and engineering projects. The 100×100×5 equal leg variant, in particular, offers a standardized solution for symmetrical 120-degree support needs, combining structural stability, processability, and cost-effectiveness. Whether for custom fabrications or specialized structural applications, Q235 hot-rolled 120-degree angle steel delivers consistent performance, ensuring structural safety and long-term value.
| Equal Angle |
| Specification(mm) | Theoretical weight(kg/m) | Specification(mm) | Theoretical weight(kg/m) |
| 25*25*2.5 | 0.98 | 90*90*7 | 9.59 |
| 25*25*3 | 1.12 | 90*90*8 | 10.90 |
| 30*30*2.5 | 1.17 | 90*90*9 | 9.59 |
| 30*30*3 | 1.36 | 90*90*10 | 13.30 |
| 30*30*4 | 1.78 | 100*100*6 | 9.22 |
| 30*30*5 | 2.16 | 100*100*7 | 10.70 |
| 38*38*3 | 1.72 | 100*100*8 | 12.1 |
| 38*38*4 | 2.26 | 100*100*10 | 14.90 |
| 40*40*3 | 1.83 | 100*100*12 | 17.90 |
| 40*40*4 | 2.41 | 100*100*13 | 19.10 |
| 40*40*5 | 2.92 | 110*110*7 | 11.92 |
| 40*40*6 | 3.50 | 110*110*8 | 13.47 |
| 45*45*4 | 2.74 | 110*110*10 | 16.69 |
| 45*45*5 | 3.38 | 125*125*8 | 15.51 |
| 50*50*3 | 2.33 | 125*125*10 | 19.14 |
| 50*50*4 | 3.06 | 125*125*12 | 22.70 |
| 50*50*5 | 3.77 | 130*130*9 | 17.90 |
| 50*50*6 | 4.43 | 130*130*10 | 19.70 |
| 50*50*8 | 5.82 | 130*130*12 | 23.40 |
| 55*55*5 | 4.17 |






















