Q235 S235jr S355jr High Quality Hot Rolled Construction Structure Angle Steel

Our hot-rolled mild steel angles, available in Q235, Ss400, and A36 grades, are premium carbon steel angle iron products meticulously manufactured in compliance with GB (Chinese) and JIS (Japanese) standards. As a direct factory supplier, we leverage advanced hot-rolling technology and strict quality control protocols to ensure consistent performance, dimensional accuracy, and reliability of each batch. These mild steel angles, also known as carbon steel angle irons, are engineered to cater to diverse structural and industrial needs, combining excellent processability with cost-effectiveness, making them a staple choice for global construction and manufacturing projects.

The core strength of this product line lies in its adoption of three globally recognized mild steel grades, all aligned with authoritative international and national standards. Q235, a classic carbon structural steel complying with GB/T 700 (Chinese standard), features a 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 tensile strength ranging from 370-500 MPa. It exhibits exceptional weldability and formability, making it ideal for general structural applications such as building frames, wall supports, and staircases. Ss400, adhering to JIS G 3101 (Japanese standard), is a versatile carbon steel with a minimum yield strength of 245 MPa and tensile strength of 400-510 MPa; its excellent processability and durability suit a wide range of uses, including machinery brackets, shipbuilding accessories, and infrastructure components. A36, a widely accepted American standard (ASTM) carbon steel, boasts a minimum yield strength of 250 MPa and tensile strength of 400-550 MPa, renowned for its superior ductility and weldability, making it a preferred choice for bridges, heavy-duty frameworks, and industrial machinery bases.

All our mild steel angles are produced via advanced hot-rolling technology, a critical process that enhances their structural integrity and performance. During production, steel billets are heated to a high temperature (1100-1250°C) to achieve optimal malleability, then precisely rolled into the desired angle profiles. This high-temperature processing refines the steel's grain structure, eliminates internal defects such as porosity and inclusions, and significantly improves toughness and ductility. The hot-rolling process also results in a natural black oxide finish, which provides a uniform surface texture and ensures tight dimensional tolerances in line with GB and JIS standards. This not only reduces the need for secondary processing but also guarantees consistent cross-sectional geometry, enabling uniform stress distribution when integrated into structural systems.

As a direct factory manufacturer, we implement comprehensive quality control measures throughout the entire production cycle to ensure product excellence. Raw materials undergo strict incoming inspections, including chemical composition analysis and mechanical property testing, to verify compliance with Q235, Ss400, and A36 grade requirements. During the hot-rolling process, real-time monitoring is conducted to maintain dimensional accuracy and profile consistency. Final products are subjected to rigorous post-production checks, including verification of leg length, thickness, angle squareness, and mechanical performance (tensile, yield, and impact tests). These stringent protocols ensure that every batch of mild steel angles meets the strict criteria of GB and JIS standards, making our products reliable and eligible for global markets.

The versatility of our Q235, Ss400, and A36 hot-rolled mild steel angles is reflected in their extensive applications across industries. They are widely used in building construction (residential and commercial frameworks, roof trusses, guardrails), infrastructure projects (highway supports, bridge components, railway accessories), machinery manufacturing (equipment frames, bases, brackets), shipbuilding, and automotive production. The diverse grade options allow engineers and contractors to select the most suitable material for specific load-bearing and environmental requirements, while the hot-rolled angle design facilitates easy assembly through welding, bolting, or riveting.

In summary, our factory-produced Q235, Ss400, and A36 hot-rolled mild steel angles combine the advantages of authoritative GB/JIS standard compliance, advanced manufacturing technology, rigorous quality control, and cost-effectiveness. With excellent mechanical properties, superior processability, and reliable performance, these carbon steel angle irons provide a trusted structural solution for both light-duty and medium-duty applications. Backed by our direct manufacturing expertise, we deliver consistent, high-quality products to meet the diverse needs of global customers.