Q235B Hot Rolled Standard Packing Model Number: Ss400 40X40mm Unqual Angle Steel

Material & Model Specifications​

1. Material: Q235B​

Q235B is a premium carbon structural steel grade conforming to China's GB/T 700 standard, with core performance indicators tailored for general structural applications:​

Mechanical Properties: Minimum yield strength of 235 MPa, tensile strength ranging from 375-500 MPa, and excellent ductility (elongation ≥26%). The "B" suffix indicates compliance with room-temperature impact test requirements (≥27 J at 20°C), ensuring structural safety under dynamic loads.​

Chemical Composition: Controlled carbon content (≤0.22%), manganese (≤1.40%), and low impurity levels (sulfur ≤0.045%, phosphorus ≤0.045%), which enhance weldability, machinability, and resistance to brittle fracture. It is equivalent to international grades such as ASTM A36 and JIS SS400, ensuring compatibility with global design standards.​

2. Model: SS400​

The SS400 model designation aligns with Japan's JIS G 3101 standard, a widely recognized benchmark for structural steel. This model confirms the product's adherence to:​

Uniform mechanical performance across batches, ensuring consistency in load-bearing capacity for large-scale projects.​

Compatibility with international fabrication practices, as SS400 is a common reference grade in cross-border construction and machinery manufacturing.​

3. Dimensions: 40X40mm Unequal Leg Design​

The 40X40mm nominal size refers to an unequal leg configuration (e.g., 40mm x 25mm or 40mm x 30mm, with leg thickness typically ranging from 3mm to 6mm, customizable by order). This asymmetric design offers unique structural advantages:​

Optimized load distribution for applications where one leg bears higher stress (e.g., edge supports, bracket connections).​

Space-saving installation in tight structural layouts, as the shorter leg reduces material overlap while maintaining structural rigidity.​

Hot Rolling Process Advantages​

The product is manufactured via precision hot rolling, a process that heats steel billets to above recrystallization temperature (≈1100-1250°C) before shaping:​

Structural Integrity: Hot rolling eliminates internal voids and refines the metal's grain structure, enhancing toughness and reducing the risk of cracking under load.​

Dimensional Accuracy: Advanced rolling mills ensure tight tolerances for leg length, thickness, and angle (90° ±1°), minimizing the need for post-production machining.​

Surface Quality: The process produces a smooth, scale-free surface (with optional pickling or galvanizing treatments available) that improves corrosion resistance and aesthetic appeal.​

Standard Packing Specifications​

To ensure safe transportation and efficient storage, the angle steel is supplied in standard industrial packaging:​

Packaging Form: Bundled with high-strength steel straps (25mm width, ≥500 MPa tensile strength) to secure individual lengths (standard lengths: 6m, 9m, 12m; cut-to-length available). Each bundle contains 50-100 pieces (depending on thickness) to balance handling convenience and load stability.​

Protection Measures: Bundles are wrapped in moisture-resistant kraft paper or PE film to prevent rust during transit, with clear labeling indicating material grade (Q235B), model (SS400), dimensions (40X40mm), length, batch number, and certification details.​

Logistics Compatibility: Standard packing dimensions (e.g., 6m length x 0.3m width x 0.2m height per bundle) are optimized for container shipping and warehouse stacking, reducing transportation costs and storage space.​

Application Scope​

Leveraging its material performance, unequal leg design, and standardized quality, this angle steel is widely used in:​

Construction: Edge supports for concrete slabs, bracings for lightweight steel frames, and connections for prefabricated buildings (where asymmetric load distribution is required).​

Industrial Fabrication: Brackets for conveyor systems, supports for electrical cabinets, and frames for small machinery-utilizing the material's weldability for seamless assembly.​

Infrastructure: Guardrail posts, sign supports, and drainage system brackets (Q235B's corrosion resistance, when paired with optional galvanization, suits outdoor environments).​

Mechanical Engineering: Components for agricultural machinery, material handling equipment, and automotive frames-benefiting from the unequal leg design's space-saving properties.​

Quality Assurance​

Each batch of Q235B hot rolled unequal angle steel undergoes strict quality control:​

Testing Protocols: Chemical composition analysis (via 光谱分析,OES), tensile and bending tests, impact tests, and dimensional inspection (using laser measuring tools) to ensure compliance with GB/T 700 and JIS G 3101.​

Certification: Every shipment includes a Certificate of Conformity (CoC) verifying material grade, mechanical properties, and batch traceability. Our production facilities are ISO 9001-certified, ensuring adherence to global quality management systems.​

This Q235B hot rolled unequal angle steel (Model: SS400, 40X40mm) combines technical precision, material reliability, and practical packaging-making it an ideal solution for demanding structural and fabrication projects worldwide.