This product line specializes in premium hot rolled equal steel angle bars, a fundamental and widely utilized carbon iron structural section steel, manufactured to rigorous international quality standards with two core material grades: SS400 and S275jr. Engineered as equal leg angle steel, it features a precise 90-degree symmetrical L-shaped cross-section with identical side length and thickness dimensions, crafted via advanced hot rolling technology to deliver consistent mechanical properties, dimensional accuracy and structural reliability. Tailored for general structural and engineering applications, this carbon iron angle steel combines cost efficiency, exceptional processability and durable load-bearing performance, making it a preferred choice for global construction, machinery fabrication and infrastructure projects.
Material Grades & Core Performance Specifications
1. SS400 Carbon Steel Equal Angle Bar
SS400 is a standard general-purpose carbon structural steel grade complying with Japanese Industrial Standards (JIS G3101), classified as ordinary hot rolled steel for general structure use. The abbreviation "SS" stands for Steel Structure, while 400 denotes the minimum tensile strength of 400 MPa. This grade features moderate carbon content, balanced mechanical properties, and outstanding versatility, with excellent cold formability, weldability and machinability without the need for pre-heat treatment or post-weld heat treatment under normal working conditions. SS400 equal angle bars offer stable compressive and bending resistance, suitable for light to medium-duty structural applications, with strictly controlled chemical composition to ensure no internal defects and consistent batch-to-batch quality, fully meeting international dimensional tolerances and surface quality requirements.
2. S275jr Carbon Steel Equal Angle Bar
S275jr is a high-quality non-alloy structural steel grade produced in accordance with European Standard EN 10025-2, a widely recognized grade for hot rolled structural sections across European and global markets. The number 275 represents a minimum yield strength of 275 MPa, ensuring superior load-bearing capacity compared to conventional general carbon steel grades, while "JR" indicates guaranteed impact toughness at room temperature (20℃), enhancing its resistance to dynamic loads and reducing the risk of brittle fracture. S275jr angle steel maintains excellent welding and bending performance, with refined internal structure achieved through controlled rolling processes, delivering higher dimensional stability and straightness. It is designed for medium to heavy-duty structural frameworks that require enhanced strength and reliable toughness, fully adhering to international structural steel safety and performance benchmarks.
Production Process & Key Product Characteristics
Our equal steel angle bars are produced through professional hot rolling technology using high-quality carbon steel billets as raw materials, undergoing strict smelting, continuous casting and precision rolling procedures to ensure dense internal structure, free from porosity, cracks, inclusions and other common defects. The precision rolling and straightening processes enable tight control over critical parameters including side length, thickness, right-angle accuracy and overall straightness, complying with international standard tolerances to guarantee seamless on-site cutting, welding and assembly. The surface is clean and smooth, with minimal oxide scale and no mechanical damages, supporting direct secondary processing such as drilling, bending, sawing and welding. As an equal leg structural section, its symmetrical design ensures uniform stress distribution, enabling effective resistance to axial pressure, shear force and bending moment, adapting to diverse structural stress conditions in engineering projects.
Core Quality & Application Advantages
International Standard Compliance: Strictly manufactured in line with JIS G3101 (SS400) and EN 10025-2 (S275jr) standards, with full inspection of chemical composition and mechanical properties to meet global industrial and construction requirements.
Premium Hot Rolled Quality: Advanced hot rolling process ensures uniform material structure, stable mechanical properties, high dimensional accuracy and excellent straightness, eliminating deformation and dimensional deviations.
Outstanding Processability: Both SS400 and S275jr grades feature exceptional weldability, cold formability and machinability, supporting flexible on-site processing and installation, lowering construction difficulty and project costs.
Wide Application Adaptability: Dual grade options cover different load-bearing demands; SS400 for cost-effective general applications, S275jr for higher strength and toughness requirements, suitable for multiple engineering fields.
Durable & Cost-Effective: High-quality carbon iron material ensures long service life, corrosion resistance under normal environmental conditions, and optimal cost-performance ratio for large-scale project procurement.
Complete Specification Range: Available in a full range of equal angle sizes to match various structural design requirements, with customizable length options available to meet specific project customization needs.
Main Application Fields
This hot rolled carbon iron equal angle steel is extensively applied in a broad spectrum of structural and industrial fields, including building construction, steel structure fabrication, machinery manufacturing, transportation infrastructure, power engineering, storage shelf construction, pipeline support systems and general industrial fabrication. Typical applications include building frame brackets, roof trusses, transmission tower components, engineering machinery supports, storage shelves, bridge auxiliary structures, vehicle frame parts and daily hardware structures. SS400 angle bars are widely used in residential buildings, light industrial workshops and general support structures; S275jr angle bars are preferred for commercial buildings, medium industrial steel structures, infrastructure components and other projects requiring higher structural safety and load-bearing standards.
With comprehensive quality control covering raw material selection, production processing and finished product inspection, our best quality hot rolled SS400 and S275jr equal steel angle bars deliver consistent performance, reliable quality and stable supply, serving as a core structural material for various engineering projects worldwide.
