Our Q235, Ss400, and A36 hot rolled mild steel equal angle bars are premium carbon structural steel products, meticulously manufactured in strict compliance with GB (Chinese National Standard), JIS (Japanese Industrial Standard), and relevant international standards. As specialized equal angle bars, they integrate high-quality mild steel materials, advanced hot-rolling technology, and a symmetric equal-angle design, delivering exceptional mechanical properties, superior processability, and reliable durability-making them an indispensable choice for diverse industrial, construction, and engineering applications worldwide.
The core advantage of this product line lies in its adoption of three globally recognized mild steel grades, each aligned with authoritative GB, JIS, and international standards, ensuring consistent chemical composition, mechanical performance, and structural integrity across every batch. These graded materials cater to varied load-bearing and application requirements, providing engineers and contractors with flexible, performance-matched solutions.
Q235, a classic carbon structural steel complying with GB/T 700 (Chinese National Standard), features a well-balanced chemical composition (0.12%-0.20% carbon, 0.30%-0.65% manganese) and reliable mechanical properties. With a minimum yield strength of 235 MPa and a tensile strength range of 370-500 MPa, it exhibits excellent weldability, formability, and ductility. This grade is widely used for light to medium-duty structural applications, including residential and commercial building frames, wall supports, staircases, and small-scale machinery brackets.
Ss400, adhering to JIS G 3101 (Japanese Industrial Standard), is a versatile mild carbon steel renowned for its balanced performance and processability. It boasts a minimum yield strength of 245 MPa and a tensile strength of 400-510 MPa, with controlled levels of harmful impurities to ensure toughness and durability. Ss400 is ideal for general structural purposes, such as bridge accessories, shipbuilding components, industrial equipment frames, and infrastructure supports, adapting seamlessly to diverse fabrication needs.
A36, a globally accepted American standard (ASTM) carbon steel, is celebrated for its superior ductility, weldability, and cost-effectiveness. With a minimum yield strength of 250 MPa and a tensile strength range of 400-550 MPa, it features a controlled chemical makeup (0.25%-0.29% carbon, 1.03%-1.65% manganese) that enables easy cutting, drilling, and welding. A36 is a preferred choice for heavy-duty structural applications, including building frameworks, bridge girders, heavy machinery bases, and large-scale infrastructure projects.
All our mild steel equal angle bars are produced via advanced hot-rolling technology, the gold standard for structural steel manufacturing. During production, steel billets of Q235, Ss400, and A36 grades are heated to a high temperature (1100-1250°C) to achieve optimal malleability, then precisely rolled into symmetric equal-angle profiles. This high-temperature processing refines the steel's grain structure, eliminates internal defects such as porosity and inclusions, and significantly enhances toughness and ductility-ensuring the angle bars can withstand lateral and axial loads without deformation.
The equal-angle design is a key feature of this product, with two legs of identical length and thickness that ensure uniform stress distribution across the cross-section. This symmetric structure is critical for maintaining structural stability in framing and support applications, allowing for balanced load transmission and reducing the risk of structural failure. Additionally, the hot-rolling process forms a natural black oxide finish, which provides a uniform surface texture and tight dimensional tolerances, adhering strictly to GB, JIS, and ASTM standards. This finish minimizes the need for secondary processing, facilitates easy surface treatment (such as painting or galvanizing), and ensures seamless integration with other structural components.
As a product compliant with GB and JIS standards, our hot rolled mild steel equal angle bars undergo rigorous quality control protocols throughout the entire production cycle. Raw materials are subject to strict incoming inspections, including chemical composition analysis and mechanical property testing, to verify grade authenticity and compliance. During hot rolling, real-time monitoring ensures consistent profile dimensions, leg squareness, and surface quality. Final products are subjected to comprehensive post-production checks, including tensile, yield, and impact tests, as well as dimensional verification, to guarantee that every unit meets the highest performance and safety standards.
This Q235 Ss400 A36 hot rolled mild steel equal angle bar exhibits exceptional versatility, finding extensive application across industries. It is widely used in building construction (residential, commercial, and industrial frameworks), infrastructure projects (highways, bridges, tunnels), machinery manufacturing (equipment frames, bases, brackets), shipbuilding, automotive production, and agricultural engineering. The diverse grade options allow for precise matching to project-specific load-bearing, environmental, and cost requirements, ensuring project efficiency and long-term structural reliability.
In summary, our Q235 Ss400 A36 GB JIS hot rolled mild steel equal angle bars combine the advantages of globally recognized steel grades, advanced manufacturing technology, and strict standard compliance. With excellent mechanical properties, superior processability, and a practical equal-angle design, they deliver a cost-effective, reliable structural solution for light-duty to heavy-duty applications. Backed by GB and JIS certification and rigorous quality control, this product line is a trusted choice for global customers seeking high-performance mild steel angle bars.
