Q235 Ss400 A36 GB JIS Hot Rolled Mild Steel Angle Bar Carbon Equal Steel Angel

This product line focuses on high-quality hot-rolled mild steel equal angle bars, meticulously manufactured to comply with two authoritative international standards-GB (Chinese National Standard) and JIS (Japanese Industrial Standard), with three core carbon structural steel grades: Q235, SS400, and A36 (ASTM A36). As a fundamental structural section steel, it features a precise 90-degree symmetrical L-shaped cross-section with identical leg lengths, engineered via advanced hot-rolling technology to deliver stable mechanical properties, strict dimensional accuracy, and superior processability. Designed for diverse industrial, construction, and fabrication applications, this carbon equal steel angle combines cost-efficiency, durability, and compliance with global standards, serving as a reliable structural material for projects of all scales worldwide.

Core Material Grades & Standard Compliance

All equal angle bars in this series are fabricated from high-purity mild carbon steel, with three mainstream grades that adhere to GB and JIS standards, catering to different load-bearing requirements and regional market demands, ensuring consistent quality and wide adaptability.

1. Q235 Carbon Steel Equal Angle Bar (GB Standard)

Q235 is a classic general-purpose mild carbon structural steel grade complying with GB/T 700 (Chinese National Standard for Carbon Structural Steel). The letter "Q" denotes yield strength, with 235 representing a minimum yield strength of 235 MPa, providing reliable load-bearing capacity for light to medium-duty structural applications. Characterized by low carbon content, Q235 exhibits excellent weldability, cuttability, and formability, requiring no complex heat treatment for routine use. It features a uniform internal microstructure, free from porosity and inclusions, ensuring consistent batch-to-batch performance, making it a cost-effective choice for general construction, auxiliary structures, and routine fabrication projects.

2. SS400 Carbon Steel Equal Angle Bar (JIS Standard)

SS400 is a standard general-purpose carbon structural steel grade conforming to JIS G3101 (Japanese Industrial Standard for Hot-Rolled Steel for General Structure). The abbreviation "SS" stands for Steel Structure, while 400 indicates a minimum tensile strength of 400 MPa. With moderate carbon content, SS400 offers balanced mechanical properties, including good ductility, plasticity, and weldability, suitable for a wide range of light to medium-duty structural applications. This grade is widely recognized in Asian and global markets for its stable performance and cost-efficiency, ideal for industrial frameworks, support brackets, and general manufacturing.

3. A36 (ASTM A36) Carbon Steel Equal Angle Bar (Global Standard)

A36, formally known as ASTM A36, is a globally ubiquitous mild carbon structural steel grade complying with ASTM International standards, fully compatible with both GB and JIS application scenarios. It features a minimum yield strength of 250 MPa and a tensile strength range of 400-550 MPa, balancing exceptional ductility, toughness, and processability. This grade requires no complex pre-heat or post-weld heat treatment under normal application conditions, exhibiting excellent compatibility with all standard welding, cutting, and bending processes. A36 equal angle bars are ideal for versatile structural uses, from general support brackets to main framework components, fully meeting international quality and safety standards for structural steel.

Production Process & Product Features

Our Q235, SS400, and A36 equal angle bars are manufactured via advanced hot-rolling (HR) technology, using high-quality continuous-cast mild steel billets that undergo rigorous raw material inspection to ensure purity and compliance with GB and JIS standards. The multi-pass hot-rolling process precisely shapes the billets into the symmetrical 90-degree L-shaped cross-section, followed by controlled cooling and high-precision straightening to maintain perfect flatness, verticality, and dimensional consistency.

The finished products feature a smooth, clean surface with minimal oxide scale, free from visible cracks, scratches, or mechanical damages, and a uniform cross-section throughout the entire length. As mild steel angle bars, they exhibit exceptional processability, supporting conventional processing methods such as arc welding, gas cutting, cold bending, and drilling, which greatly simplifies on-site fabrication and installation. The hot-rolled manufacturing process enhances the material's toughness and ductility, ensuring it can withstand bending, shear, and compressive forces without deformation or fracture.

Key Product Advantages

Dual Standard Compliance: Manufactured in strict accordance with GB and JIS standards, fully compatible with global application scenarios and regional market requirements, with complete quality certification available.

Multi-Grade Versatility: Q235, SS400, and A36 grades cover light, medium, and heavy-duty load requirements, providing flexible material choices for different project scales and budget considerations.

Symmetrical Equal Angle Design: 90-degree symmetrical cross-section ensures even stress distribution, preventing stress concentration and enhancing overall structural stability, ideal for symmetric load-bearing scenarios.

Superior Processability: Excellent weldability, cuttability, and bendability support efficient on-site processing and installation, reducing construction and fabrication time and labor costs.

Strict Dimensional Accuracy: Precise control over leg length, thickness, and right-angle precision meets GB and JIS tolerance standards, ensuring seamless compatibility with project designs.

Cost-Effective Mild Steel Construction: Dense internal structure, stable mechanical properties, and competitive pricing for bulk orders, making it suitable for large-scale projects and long-term procurement.

Main Application Scenarios

This series of Q235, SS400, A36 GB JIS hot-rolled mild steel equal angle bars is extensively applied in industrial, construction, and manufacturing fields. Its symmetrical design and multi-grade options make it ideal for building frameworks, roof trusses, wall brackets, storage shelves, and balanced support structures. Specific applications include industrial workshops, commercial buildings, warehouse constructions, bridge auxiliary facilities, transmission tower components, mechanical equipment bases, and general hardware manufacturing. Q235 is preferred for cost-sensitive light-duty projects, SS400 for JIS-standard applications in Asian markets, and A36 for global projects requiring international standard compliance. With its reliable quality, dual standard adherence, and versatile performance, this equal steel angle serves as an indispensable structural material for global engineering and fabrication projects.