Ss400 S235jr S355jr Equal/Unequal 80*80 Steel Angle Ms Steel

Our Ss400, S235jr, and S355jr mild steel (MS) angle bars-available in both equal and unequal configurations, with a focus on the high-demand 80*80 equal angle specification-are engineered to deliver exceptional versatility and reliability for diverse structural and industrial applications. Compliant with international standards (Ss400: JIS G 3101; S235jr/S355jr: EN 10025), these angle bars are crafted from high-quality mild steel with strictly controlled chemical compositions (low carbon content, optimized manganese levels, and trace amounts of silicon, phosphorus, and sulfur), ensuring consistent mechanical properties, structural integrity, and adaptability to varied load-bearing requirements.

Each material grade within this lineup offers tailored mechanical performance to suit specific application scenarios. S235jr, a widely used European standard mild steel, features a minimum yield strength of 235 MPa and a tensile strength range of 360-510 MPa, making it ideal for light to medium-duty structural components. S355jr, a high-strength European grade, delivers enhanced load-bearing capacity with a minimum yield strength of 355 MPa and tensile strength of 470-630 MPa, suitable for heavy-duty structural applications. Ss400, a Japanese standard carbon steel, provides a minimum yield strength of 235 MPa and tensile strength of 400-510 MPa, balancing strength and workability for general construction needs. All grades exhibit excellent ductility (elongation ≥21%) and weldability, compatible with standard welding processes (shielded metal arc welding, gas metal arc welding), enabling seamless on-site fabrication and integration into complex assemblies.

These mild steel angle bars are available in both equal and unequal L-shaped configurations, with the 80*80 equal angle (80mm leg length, thickness ranging from 5mm to 12mm) being a standout specification for balanced load distribution. Manufactured via advanced hot-rolling technology (conducted at temperatures above 900°C, exceeding the steel's recrystallization point), the angle bars benefit from refined grain structures that enhance toughness, impact resistance, and fatigue performance. The hot-rolling process also ensures precise dimensional accuracy-consistent leg squareness, uniform thickness, and tight tolerances-while the natural surface finish facilitates excellent adhesion for subsequent protective treatments. For unequal angle variants, a wide range of leg length combinations (e.g., 80*50, 80*63) are available to meet custom structural design requirements.

Designed for versatility in construction and industrial applications, these Ss400, S235jr, and S355jr mild steel angle bars are widely utilized in commercial and residential building framing, industrial workshop bracing, bridge components, storage rack systems, mechanical equipment frames, and prefabricated modules. The 80*80 equal angle, in particular, is favored for structural framing, floor joists, and wall studs due to its balanced load-bearing capacity. Their mild steel composition enables compatibility with various surface protection techniques-hot-dip galvanization, epoxy coating, powder coating-significantly improving corrosion resistance and extending service life in harsh environments such as coastal areas, industrial zones, and outdoor infrastructure.

Stringent quality assurance protocols are implemented throughout the production cycle to ensure compliance with JIS G 3101 and EN 10025 standards. Comprehensive testing includes chemical composition analysis (optical emission spectrometry), mechanical property verification (tensile, yield, elongation tests), dimensional inspection with precision tools, and surface defect detection. These measures guarantee consistent performance across every batch. For engineers, contractors, and fabricators seeking multi-standard, high-performance mild steel angle bars-including the popular 80*80 specification-our product lineup offers unparalleled adaptability and reliability for diverse project requirements.